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Quantum Interference and Optical Tuning of Self-Trapped Exciton State in Double Halide Perovskite 认领 引用
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作者 Kai-Xuan Xu Xin-Bao Liu +9 位作者 Simin Pang Zhe Zhang Yubin Wang Haonan Chang Jiajun Luo Jiang Tang Qihua Xiong Sheng Meng Shiwu Gao Jun Zhang 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第3期87-101,共15页
Self-trapped excitons(STEs),known for their unique radiative properties,have been harnessed in diverse photonic devices;however,their comprehensive understanding and manipulation remain elusive.In this study,we presen... Self-trapped excitons(STEs),known for their unique radiative properties,have been harnessed in diverse photonic devices;however,their comprehensive understanding and manipulation remain elusive.In this study,we present novel experimental and theoretical evidence revealing the hybrid nature and optical tunability of STE state in Cs2Ag0.4Na0.6InCl6.The detection of the Fano resonance in laser energy-dependent Raman and photoluminescence spectra indicates the emergence of an exciton-phonon hybrid state,arising from robust quantum interference between the discrete phonon and continuum exciton states.Moreover,we demonstrate continuous tuning of this hybrid state with the energy and intensity of the laser field.These findings lay the foundation for a comprehensive understanding of the nature of STE and their potential for state control. 展开更多
关键词 photonic deviceshowevertheir self trapped exciton state optical tuning exciton phonon hybrid state fano resonance photoluminescence spectra quantum interference double halide perovskite
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Few-shot driven construction method of a large-scale light-trapped insect annotation data based on vision foundation models and self-supervised learning 认领 引用
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作者 Yanchen You Zelin Feng +7 位作者 Zhe Wang Lingyi Li Ju Luo Jun Lü Haowen Zhang Baojun Yang Shuhua Liu Qing Yao 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2026年第7期2915-2935,共21页
The intelligent pest-monitoring light trap based on machine vision employs specific light spectra to attract pests,infrared heating to eliminate pests,and artificial intelligence models to recognize and count them.Ach... The intelligent pest-monitoring light trap based on machine vision employs specific light spectra to attract pests,infrared heating to eliminate pests,and artificial intelligence models to recognize and count them.Achieving optimal model performance requires a high-quality insect annotated dataset.However,traditional manual annotation is expert-dependent,time-consuming,and inefficient for large-scale multi-class insect labeling.This study establishes an efficient,few-shot learning approach to construct a large-scale light-trapped insect dataset through a two-stage annotation framework:detection followed by classification.Specifically,a MLTIDD addresses scale and receptive field disparities between large and tiny insects.Based on a fine-tuned Grounding DINO,SAM and SAHI are integrated to detect insects at multiple scales.Subsequently,InsectSSRL,an iBOT-based self-supervised method,learns robust insect feature representations from the extensive set of unlabeled insect sub-images detected by MLTIDD.It enhances feature extraction capability for insect subimages through three proxy tasks.This feature extractor supports a classification model to pre-classify insect sub-images.Following expert correction,labels are traced back to original images to complete annotation work for the light-trapped insect dataset.Experimental results demonstrate that under limited samples,MLTIDD achieved 79.6%average precision(AP)50-95 and 90.8%average recall(AR),surpassing DINO by 7.0 and 4.7 percentage points.InsectSSRL attained 85.87%top-1 accuracy in k-NN evaluation.In few-shot classification,Swin-T pre-trained with InsectSSRL and fine-tuned on 5%of InsectID achieved 80.35%accuracy,exceeding iBOT by 2.08 and COCO-based transfer learning by 11.3 percentage points.The proposed pipeline improved mAP50-95 by 10.91 and AR by 8.26 percentage points compared to DINO and iBOT,while reducing expert annotation time by approximately 80%relative to manual labeling. 展开更多
关键词 intelligent pest-monitoring light trap insect dataset construction few-shot learning self-supervised learning insect detection and classification automated insect annotation
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Experimental Proposal on Non-Abelian Aharonov-Bohm Caging Effect with a Single Trapped Ion 认领 引用
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作者 Zhiyuan Liu Wanchao Yao +4 位作者 Sai Li Yi Li Yue Li Zheng-Yuan Xue Yiheng Lin 《Chinese Physics Letters》 SCIE EI CAS CSCD 2025年第6期9-18,共10页
In the lattice system,when the synthetic flux reaches aπphase along a closed loop under the synthetic gauge field,destructive interference occurs and gives rise to the localization phenomenon.This is known as the Aha... In the lattice system,when the synthetic flux reaches aπphase along a closed loop under the synthetic gauge field,destructive interference occurs and gives rise to the localization phenomenon.This is known as the Aharonov-Bohm(AB)caging effect.It provides a powerful tool for the study of quantum transport and dynamical effects.In the system where lattice sites possess internal structure and the underlying gauge field is non-Abelian,localization can also occur,forming the non-Abelian AB caging.Here,we propose an experimental scheme to synthesize non-Abelian gauge fields with a single trapped ion by coupling multiple internal levels and Fock states in its motion via laser fields.In contrast to the Abelian AB caging,we numerically observe that the non-Abelian AB caging occurs either when the interference matrix is nilpotent,or when the initial state is specifically set.Our experimental scheme broadens the study of localization phenomena and provides a novel tool for the study of non-Abelian physics. 展开更多
关键词 synthetic flux quantum transport dynamical effectsin localization Aharonov Bohm caging effect gauge field lattice sites trapped ion non abelian gauge fields
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High-Fidelity Two-Qubit Quantum Logic Gates in a Trapped-Ion Chain Using Axial Motional Modes 认领 引用
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作者 Xingyu Zhao Ji Bian +3 位作者 Yi Li Yue Li Mengxiang Zhang Yiheng Lin 《Chinese Physics Letters》 SCIE EI CAS CSCD 2025年第11期139-149,共11页
Trapped-ion systems are one of the leading platforms for quantum information processing, where a key challenge is to scale up system size while maintaining high-fidelity two-qubit operations. A promising approach is t... Trapped-ion systems are one of the leading platforms for quantum information processing, where a key challenge is to scale up system size while maintaining high-fidelity two-qubit operations. A promising approach is to build high-performance modules interconnected via strong coupling. In particular, axial motional modes offer a practical mechanism to couple the ions in a chain, enabling the preparation of Greenberger–Horne–Zeilinger states with up to 24 ions using global operations, as well as high-fidelity two-qubit gates(96.6%–98.0%) in fully connected five-ion chains. Here, we demonstrate two-qubit quantum logic gates in a 5-ion40Ca+chain using axial modes, achieving fidelities exceeding 99% for adjacent pairs and over 98% for arbitrary pairs by carefully tackling dominant error sources. Our results are beneficial to the development of scalable ion-trap quantum processors,quantum simulation and quantum-enhanced metrology. 展开更多
关键词 global operations trapped ion systems axial motional modes preparation greenberger horne zeilinger states quantum information processing high fidelity gates strong coupling scale up system size
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Interacting Mathieu equation,synchronization dynamics and collision-induced velocity exchange in trapped ions 认领 引用
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作者 Asma Benbouza Xiaoshui Lin +1 位作者 Jin Ming Cui Ming Gong 《Communications in Theoretical Physics》 SCIE CAS CSCD 2025年第8期67-81,共15页
Recently,large-scale trapped ion systems have been realized in experiments for quantum simulation and quantum computation.They are the simplest systems for dynamical stability and parametric resonance.In this model,th... Recently,large-scale trapped ion systems have been realized in experiments for quantum simulation and quantum computation.They are the simplest systems for dynamical stability and parametric resonance.In this model,the Mathieu equation plays the most fundamental role for us to understand the stability and instability of a single ion.In this work,we investigate the dynamics of trapped ions with the Coulomb interaction based on the Hamiltonian equation.We show that the many-body interaction will not influence the phase diagram for instability.Then,the dynamics of this model in the large damping limit will also be analytically calculated using few trapped ions.Furthermore,we find that in the presence of modulation,synchronization dynamics can be observed,showing an exchange of velocities between distant ions on the left side and on the right side of the trap.These dynamics resemble that of the exchange of velocities in Newton's cradle for the collision of balls at the same time.These dynamics are independent of their initial conditions and the number of ions.As a unique feature of the interacting Mathieu equation,we hope this behavior,which leads to a quasi-periodic solution,can be measured in current experimental systems.Finally,we have also discussed the effect of anharmonic trapping potential,showing the desynchronization during the collision process.It is hoped that the dynamics in this many-body Mathieu equation with damping may find applications in quantum simulations.This model may also find interesting applications in dynamics systems as a pure mathematical problem,which may be beyond the results in the Floquet theorem. 展开更多
关键词 trapped ions Mathieu equation Floquet theory synchronization many-body interactions
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Robust quantum gate optimization with first-order derivatives of ion–phonon and ion–ion couplings in trapped ions 认领 引用
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作者 Jing-Bo Wang 《Chinese Physics B》 SCIE EI CAS CSCD 2025年第4期287-294,共8页
Trapped ion hardware has made significant progress recently and is now one of the leading platforms for quantum computing.To construct two-qubit gates in trapped ions,experimentalmanipulation approaches for ion chains... Trapped ion hardware has made significant progress recently and is now one of the leading platforms for quantum computing.To construct two-qubit gates in trapped ions,experimentalmanipulation approaches for ion chains are becoming increasingly prevalent.Given the restricted control technology,how implementing high-fidelity quantum gate operations is crucial.Many works in current pulse design optimization focus on ion–phonon and effective ion–ion couplings while ignoring the first-order derivative terms expansion impacts of these two terms brought on by experiment defects.This paper proposes a novel robust quantum control optimization method in trapped ions.By introducing the first-order derivative terms caused by the error into the optimization cost function,we generate an extremely robust Mølmer–Sørensen gate with infidelity below 10−3 under a drift noise range of±10 kHz,the relative robustness achieves a tolerance of±5%,compared to the 200-kHz frequency spacing between phonon modes,and for time noise drift,the tolerance reached to 2%.Our work reveals the vital role of the first-order derivative terms of coupling in trapped ion pulse control optimization,especially the first-order derivative terms of ion–ion coupling.It provides a robust optimization scheme for realizing more efficient entangled states in trapped ion platforms. 展开更多
关键词 trapped ion quantum computing robust optimization high-fidelity quantum gates magnus expansion
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Design and Performance of an Improved Trapped Vortex Combustor 认领 引用 被引量：8
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作者 JIN Yi HE Xiaomin +2 位作者 JIANG Bo WU Zejun DING Guoyu 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2012年第6期864-870,共7页
A trapped vortex combustor(TVC)has been a very promising novel concept for it offers improvements in lean blow out,altitude relight,operating range,as well as a potential to decrease NOx emissions compared to conventi... A trapped vortex combustor(TVC)has been a very promising novel concept for it offers improvements in lean blow out,altitude relight,operating range,as well as a potential to decrease NOx emissions compared to conventional combustors.The present paper discusses the improved designs of the new combustor over the prior ones of our research group,including that:a)the over-all dimensions,both axial and radial,are reduced to those of an actual aero-engine combustor;b)the air flow distribution is optimized,and especially 15%of the air is fed into the liner as cooling air;c)a straight-wall diffuser with divergence angle 9°is added.A series of experiments(cavity-fueled only,under atmospheric pressure)has been conducted to investigate the performance of the improved TVC.Experimental results show that at the inlet temperature of 523 K,the inlet pressure of 0.1 MPa,stable operation of the TVC test rig is observed for the Mach number 0.15-0.34,indicating good flame stability;the combustion efficiency obtained in this paper falls into the range of 60%-96%;as the total excess air ratio increases,the combustion efficiency decreases,while the increase of the inlet temperature is beneficial to high combustion efficiency;besides,the optimal Mach numbers for high combustion efficiency under different inlet conditions are confirmed.The outlet temperature profiles feature a bottom in the midheight of the exit.This paper demonstrates the feasibility for the TVC to be applied to a realistic aero-engine preliminarily and provides reference for TVC design. 展开更多
关键词 combustion trapped vortex combustor improved design performance experimental demonstration
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Fault zone structures of northern and southern portions of the main central fault generated by the 2008 Wenchuan earthquake using fault zone trapped waves 认领 引用 被引量：17
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作者 Songlin Li Xiaoling Lai +1 位作者 Zhixiang Yao Qing Yang 《Earthquake Science》 2009年第4期417-424,共8页
The rupture process of the May 12, 2008 Ms8.0 Wenchuan earthquake was very complex. To study the rupture zones generated by this earthquake, four dense temporary seismic arrays across the two surface breaking traces o... The rupture process of the May 12, 2008 Ms8.0 Wenchuan earthquake was very complex. To study the rupture zones generated by this earthquake, four dense temporary seismic arrays across the two surface breaking traces of the main-shock were deployed in July and recorded a great amount of aftershocks. This paper focuses on the data interpretation of two arrays across the central main fault, the northern array line 1 and southern array line 3. The fault zone trapped waves recorded by the two arrays were used to study the structure of the central main fault and the difference between the northern and southern portions. The results show that the widths of the rupture zone are about 170-200 m and 200-230 m for northern and southern portions respectively. And the corresponding dip angles are 80° and 70°. The seismic velocity inside the fracture zone is about one half of the host rock. By comparison, the northern portion of the rupture zone is slightly narrower and steeper than the southern portion. Besides these differences, one more interesting and important difference is the positions of the rupture zone with respect to surface breaking traces. At the northern portion, the rupture zone is centered at the surface breaking trace, while at the southern portion it is not but is shifted to the northwest. This difference reflects the difference of rupture behaviors between two portions of the central main fault. The width of the rupture zone is smaller than that of MS.1 Kunlun earthquake though these two earthquakes have almost the same magnitudes. Multiple ruptures may be one factor to cause the narrower rupture zone. 展开更多
关键词 Wenchuan earthquake seismic rupture zone fault zone trapped waves
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Preparation of the four-qubit cluster states in cavity QED and the trapped-ion system 认领 引用 被引量：9
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作者 郑小娟 徐慧 +1 位作者 方卯发 朱开成 《Chinese Physics B》 SCIE EI CAS 2010年第3期338-342,共5页
This paper proposes a simple scheme to generate a four-atom entangled cluster state in cavity quantum electrodynamics. With the assistantce of a strong classical field the cavity is only virtually excited and no quant... This paper proposes a simple scheme to generate a four-atom entangled cluster state in cavity quantum electrodynamics. With the assistantce of a strong classical field the cavity is only virtually excited and no quantum information will be transferred from the atoms to the cavity during the preparation for a four-atom entangled cluster state, and thus the scheme is insensitive to the cavity field states and cavity decay. Assuming that deviation of laser intensity is 0.01 and that of simultaneity for the interaction is 0.01, it shows that the fidelity of the resulting four-atom entangled cluster state is about 0.9886. The scheme can also be used to generate a four-ion entangled cluster state in a hot trapped-ion system. Assuming that deviation of laser intensity is 0.01, it shows that the fidelity of the resulting four-ion entangled cluster state is about 0.9990. Experimental feasibility for achieving this scheme is also discussed. 展开更多
关键词 cavity quantum electrodynamics （QED） trapped ions cluster state
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Rock Damage Structure of the South Longmen-Shan Fault in the 2008 M8 Wenchuan Earthquake Viewed with Fault-Zone Trapped Waves and Scientific Drilling 认领 引用 被引量：9
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作者 LI Yonggang XU Zhiqin LI Haibing 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2014年第2期444-467,共24页
This article is to review results from scientific drilling and fault-zone trapped waves （FZTWs） at the south Longman-Shan fault （LSF） zone that ruptured in the 2008 May 12 M8 Wenchuan earthquake in Sichuan,China.I... This article is to review results from scientific drilling and fault-zone trapped waves （FZTWs） at the south Longman-Shan fault （LSF） zone that ruptured in the 2008 May 12 M8 Wenchuan earthquake in Sichuan,China.Immediately after the mainshock,two Wenchuan Fault Scientific Drilling （WFSD） boreholes were drilled at WFSD-1 and WFSD-2 sites approximately 400 m and 1 km west of the surface rupture along the Yinxiu-Beichuan fault （YBF）,the middle fault strand of the south LSF zone.Two boreholes met the principal slip of Wenchuan earthquake along the YBF at depths of 589-m and 1230-m,respectively.The slip is accompanied with a 100-200-m-wide zone consisting of fault gouge,breccia,cataclasite and fractures.Close to WFSD-1 site,the nearly-vertical slip of ～4.3-m with a 190-m wide zone of highly fractured rocks restricted to the hanging wall of the YBF was found at the ground surface after the Wenchuan earthquake.A dense linear seismic array was deployed across the surface rupture at this venue to record FZTWs generated by aftershocks.Observations and 3-D finite-difference simulations of FZTWs recorded at this cross-fault array and network stations close to the YBF show a distinct low-velocity zone composed by severely damaged rocks along the south LSF at seismogenic depths.The zone is several hundred meters wide along the principal slip,within which seismic velocities are reduced by ～30-55％ from wall-rock velocities and with the maximum velocity reduction in the ～200-m-wide rupture core zone at shallow depth.The FZTW-inferred geometry and physical properties of the south LSF rupture zone at shallow depth are in general consistent with the results from petrological and structural analyses of cores and well log at WFSD boreholes.We interpret this remarkable low-velocity zone as being a break-down zone during dynamic rupture in the 2008 M8 earthquake.We examined the FZTWS generated by similar earthquakes before and after the 2008 mainshock and observed that seismic velocities within fault core zone was reduced by ～10％ due to severe damage of fault rocks during the M8 mainshock.Scientific drilling and locations of aftershocks generating prominent FZTWs also indicate rupture bifurcation along the YBF and the Anxian-Guangxian fault （AGF）,two strands of the south LSF at shallow depth.A combination of seismic,petrologic and geologic study at the south LSF leads to further understand the relationship between the fault-zone structure and rupture dynamics,and the amplification of ground shaking strength along the low-velocity fault zone due to its waveguide effect. 展开更多
关键词 Rupture zone rock damage structure scientific drilling fault-zone trapped waves Wenchuan Earthquake Longmen-Shan Fault
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Quantum Entropic Dynamics of a Trapped Ion in a Standing Wave 认领 引用 被引量：9
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作者 FANG Mao-Fa ZHOU Peng S.Swain 《Chinese Physics Letters》 SCIE EI CAS 2000年第12期885-887,共3页
By performing a unitary transformation,we transform the Hamiltonian of the trapped ion in any position of standing wave to that of the normal Jaynes-Cummings model in ionic bare basis and we obtain a general evolution... By performing a unitary transformation,we transform the Hamiltonian of the trapped ion in any position of standing wave to that of the normal Jaynes-Cummings model in ionic bare basis and we obtain a general evolution operator of the trapped ion system.We study the quantum entropic dynamics of the phonons and trapped ion.Our results show that,when the trapped ion is located at the node of standing wave,the quantum entropic dynamics of phonons and trapped ion are the same as the one of the field in the Jaynes-Cummings model.When the trapped ion deviates from the node of standing wave,the entropies of the phonons and ion keep their maximum value except at the initial stage,and the phonons and trapped ion become extremely entangled. 展开更多
关键词 Quantum trapped Standing
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Wave Scattering by Twin Surface-Piercing Plates Over A Stepped Bottom:Trapped Wave Energy and Energy Loss 认领 引用 被引量：2
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作者 DENG Zheng-zhi WANG Chen +3 位作者 WANG Chi YAO Yu OU Ze-ting WANG Li-xian 《China Ocean Engineering》 SCIE EI CSCD 2019年第4期398-411,共14页
To evaluate the trapped wave energy and energy loss, the problem of wave scattering by twin fixed vertical surface- piercing plates over a stepped bottom is numerically simulated using the open source package OpenFOAM... To evaluate the trapped wave energy and energy loss, the problem of wave scattering by twin fixed vertical surface- piercing plates over a stepped bottom is numerically simulated using the open source package OpenFOAM and the associated toolbox waves2Foam. The volume of fluid (VOF) method was employed to capture the free surface in the time domain. The validation of the present numerical model was performed by comparing with both the analytical and experimental results. The effects of the spacing between two plates and the configuration of stepped bottom on the hydrodynamic characteristics, such as reflection and transmission coefficients, viscous dissipation ratio, and relative wave height between the plates (termed as trapped wave energy), were examined. Moreover, the nonlinear effects of the incident wave height on the hydrodynamic characteristics were addressed as well. The results show that the step configuration can be tuned for efficient-performance of wave damping, and the optimum configurations of the step length B, the step height h1 and the spacing b, separately equaling λ/4, 3h/4, and 0.05h (λ and h are the wavelength and the water depth, respectively), are recommended for the trapping of wave energy. 展开更多
关键词 OpenFOAM twin surface-piercing plates viscous dissipation wave nonlinearity trapped wave energy
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Quantum teleportation by entanglement swapping with trapped ions 认领 引用 被引量：4
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作者 郑小娟 方卯发 +1 位作者 蔡建武 廖湘萍 《Chinese Physics B》 CAS 2006年第3期492-495,共4页
An effective teleportation scheme for an unknown ionic internal state via trapped ions is proposed without joint Bell-state measurement （BSM）. In the constructed quantum channel process, we make use of entanglement ... An effective teleportation scheme for an unknown ionic internal state via trapped ions is proposed without joint Bell-state measurement （BSM）. In the constructed quantum channel process, we make use of entanglement swapping to avoid decrease in entanglement during the distributing of particles. Thus our scheme provides new prospects for quantum teleportatlon in a longer distance. The distinct advant.age of our scheme is insensitive to the heating of vibrational mode. Furthermore, our scheme has no any individual optical access, and the successful probability also can reach 1. 展开更多
关键词 entanglement entanglement swapping quantum teleportation trapped ions
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Model-Simulated Coastal Trapped Waves Stimulated by Typhoon in Northwestern South China Sea 认领 引用 被引量：1
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作者 CAO Xuefeng SHI Hongyuan +4 位作者 SHI Maochong GUO Peifang WU Lunyu DING Yang WANG Lu 《Journal of Ocean University of China》 SCIE CAS CSCD 2017年第6期965-977,共13页
In this paper, we apply an unstructured grid coastal ocean model to simulate variations in the sea level and currents forced by two typhoons in the northwestern South China Sea(SCS). The model simulations show distinc... In this paper, we apply an unstructured grid coastal ocean model to simulate variations in the sea level and currents forced by two typhoons in the northwestern South China Sea(SCS). The model simulations show distinct differences for the two cases in which the typhoon paths were north and south of the Qiongzhou(QZ) Strait. In both cases, coastal trapped waves(CTWs) are stimulated but their propagation behaviors differ. Model sensitivity simulations suggest the dominant role played by alongshore wind in the eastern SCS(near Shanwei) and southeast of Hainan Island. We also examine the influence of the Leizhou Peninsula by changing the coastline in simulation experiments. Based on our results, we can draw the following conclusions: 1) The CTWs stimulated by the northern typhoon are stronger than the southern CTW. 2) In the two cases, the directions of the current structures of the QZ cross-transect are reversed. The strongest flow cores are both located in the middle-upper area of the strait and the results of our empirical orthogonal function analysis show that the vertical structure is highly barotropic. 3) The simulated CTWs divide into two branches in the QZ Strait for the northern typhoon, and an island trapped wave(ITW) around Hainan Island for the southern typhoon. 4) The Leizhou Peninsula plays a significant role in the distribution of the kinetic energy flux between the two CTW branches. In the presence of the Leizhou Peninsula, the QZ branch has only 39.7 percent of the total energy, whereas that ratio increases to 72.2 percent in its absence. 展开更多
关键词 coastal trapped waves typhoon surge coastline influence South China Sea ocean modeling
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Quantum logic gates with two-level trapped ions beyond Lamb-Dicke limit 认领 引用 被引量：2
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作者 郑小娟 罗益民 蔡建武 《Chinese Physics B》 SCIE EI CAS 2009年第4期1352-1356,共5页
In the system with two two-level ions confined in a linear trap, this paper presents a simple scheme to realize the quantum phase gate （QPG） and the swap gate beyond the Lamb Dicke （LD） limit. These two-qubit quan... In the system with two two-level ions confined in a linear trap, this paper presents a simple scheme to realize the quantum phase gate （QPG） and the swap gate beyond the Lamb Dicke （LD） limit. These two-qubit quantum logic gates only involve the internal states of two trapped ions. The scheme does not use the vibrational mode as the data bus and only requires a single resonant interaction of the ions with the lasers. Neither the LD approximation nor the auxiliary atomic level is needed in the proposed scheme. Thus the scheme is simple and the interaction time is very short, which is important in view of decoherence. The experimental feasibility for achieving this scheme is also discussed. 展开更多
关键词 trapped ions quantum phase gate swap gate beyond the Lamb Dicke limit
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Scheme for teleportation of unknown states of trapped ion 认领 引用 被引量：4
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作者 陈美锋 马宋设 《Chinese Physics B》 SCIE EI CAS 2008年第2期451-455,共5页
A scheme is presented for teleporting an unknown state in a trapped ion system. The scheme only requires a single laser beam. It allows the trap to be in any state with a few phonons, e.g. a thermal motion. Furthermor... A scheme is presented for teleporting an unknown state in a trapped ion system. The scheme only requires a single laser beam. It allows the trap to be in any state with a few phonons, e.g. a thermal motion. Furthermore, it works in the regime, where the Rabi frequency of the laser is on the order of the trap frequency. Thus, the teleportation speed is greatly increased, which is important for decreasing the decoherence effect. This idea can also be used to teleport an unknown ionic entangled state. 展开更多
关键词 teleportation trapped ion Rabi frequency
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MALDI coupled with laser-postionization and trapped ion mobility spectrometry contribute to the enhanced detection of lipids in cancer cell spheroids 认领 引用 被引量：1
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作者 Jing Chen Peisi Xie +3 位作者 Pengfei Wu Yu He Zian Lin Zongwei Cai 《Chinese Chemical Letters》 SCIE CAS CSCD 2024年第4期464-468,共5页
Cancer cell spheroids(CCS) are a valuable three-dimensional cell model in cancer studies because they could replicate numerous characteristics of solid tumors. Increasing researches have used matrix-assisted laser des... Cancer cell spheroids(CCS) are a valuable three-dimensional cell model in cancer studies because they could replicate numerous characteristics of solid tumors. Increasing researches have used matrix-assisted laser desorption/ionization mass spectrometry imaging(MALDI-MSI) to investigate the spatial distribution of endogenous compounds(e.g., lipids) in CCS. However, only limited lipid species can be detected owing to a low ion yield by using MALDI. Besides, it is still challenging to fully characterize the structural diversity of lipids due to the existence of isomeric/isobaric species. Here, we carried out the initial application of MALDI coupled with laser-postionization(MALDI-2) and trapped ion mobility spectrometry(TIMS) imaging in HCT116 colon CCS to address these challenges. We demonstrated that MALDI-2 is capable of detecting more number and classes of lipids in HCT116 colon CCS with higher signal intensities than MALDI. TIMS could successfully separate numerous isobaric/isomeric species of lipids in CCS. Interestingly, we found that some isomeric/isobaric species have totally different spatial distributions in colon CCS. Further MS/MS imaging analysis was employed to determine the compositions of fatty acid chains for isomeric species by examining disparities in signal intensities and spatial distributions of product ions. This work stresses the robust ability of TIMS and MALDI-2 imaging in analyzing endogenous lipids in CCS, which could potentially become powerful tools for future cancer studies. 展开更多
关键词 Matrix-assisted laser desorption/ionization(MALDI) Mass spectrometry imaging MALDI coupled with laser-postionization Trapped ion mobility spectrometry Cancer cell spheroids
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Generation of Three-Qutrit Singlet States with Two-Level Trapped Ions 认领 引用 被引量：1
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作者 杨榕灿 叶丽香 +1 位作者 林秀 陈翔 《Communications in Theoretical Physics》 SCIE CAS CSCD 2015年第10期391-394,共4页
We propose an adiabatic-passage scheme for the generation of three-qutrit singlet states with two-level trapped ions. Distinctly different from previous proposals, we encode qutrits in Dicke states with two-level ions... We propose an adiabatic-passage scheme for the generation of three-qutrit singlet states with two-level trapped ions. Distinctly different from previous proposals, we encode qutrits in Dicke states with two-level ions and use the adiabatic-evolution techniques in order not to exactly control the laser pulses, making the realization of the scheme much easier. Furthermore, the phonon is only virtually excited in the procedure, so the effect of the phonon losses can be reduced. 展开更多
关键词 singlet states adiabatic passage trapped ions
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A scheme for the implementation of unconventional geometric phase gates with trapped ions 认领 引用 被引量：1
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作者 谢鸿 李洪才 +2 位作者 杨榕灿 林秀 黄志平 《Chinese Physics B》 CAS 2007年第11期3382-3385,共4页
We propose a scheme for the realization of unconventional geometric two-qubit phase gates with two identical two-level ions, In the present scheme, the two ions are simultaneously illuminated by a standing-wave laser ... We propose a scheme for the realization of unconventional geometric two-qubit phase gates with two identical two-level ions, In the present scheme, the two ions are simultaneously illuminated by a standing-wave laser pulse with its pulse frequency being tuned to the ionic transition. The gate operation time can be much shorter, making the system robust against decoherence. In addition, we choose the appropriate experimental parameters to construct the geometric phase gate in one step, and thus avoid implementing the pure geometric single qubit operation. 展开更多
关键词 unconventional geometric phase gate trapped ions two-level ions
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Cluster states prepared by using hot trapped ions 认领 引用 被引量：1
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作者 杨榕灿 李洪才 +1 位作者 林秀 黄志平 《Chinese Physics B》 CAS 2007年第8期2219-2223,共5页
We propose a scheme for the preparation of one-dimensional and two-dimensional cluster states by using hot trapped ions. The scheme is based on the interaction between two ions and bichromatic radiation. The vibration... We propose a scheme for the preparation of one-dimensional and two-dimensional cluster states by using hot trapped ions. The scheme is based on the interaction between two ions and bichromatic radiation. The vibrational mode in our protocol is only virtually excited so that the system is insensitive to the thermal field. In addition, we only use two levels of ions as qubits and the successful probability may achieve 100%. 展开更多
关键词 cluster states hot trapped ions bichromatic radiation two-level ions
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