检索结果-南通市图书馆

同方期刊数据库

Quantum computation and simulation with vibrational modes of trapped ions

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2021年第6期30卷 1-17页

作者： Wentao Chen Jaren Gan Jing-Ning Zhang Dzmitry Matuskevich Kihwan Kim Department of Physics Tsinghua UniversityBeijing 100084China Centre for Quantum Technologies National University of Singapore3 Science Drive 2117543 SingaporeSingapore Beijing Academy of Quantum Information Sciences Beijing 100193China Department of Physics National University of Singapore2 Science Drive 3117551 SingaporeSingapore

Vibrational degrees of freedom in trapped-ion systems have recently been gaining attention as a quantum resource,beyond the role as a mediator for entangling quantum operations on internal degrees of freedom,because of the large available Hilbert *** vibrational modes can be represented as quantum harmonic oscillators and thus offer a Hilbert space with infinite *** we review recent theoretical and experimental progress in the coherent manipulation of the vibrational modes,including bosonic encoding schemes in quantum information,reliable and efficient measurement techniques,and quantum operations that allow various quantum simulations and quantum computation *** describe experiments using the vibrational modes,including the preparation of non-classical states,molecular vibronic sampling,and applications in quantum *** finally discuss the potential prospects and challenges of trapped-ion vibrational-mode quantum information processing.

关键词： quantum computation quantum simulation trapped ions vibrational modes

Quantum logic gates with two-level trapped ions beyond Lamb-Dicke limit

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2009年第4期18卷 1352-1356页

作者：郑小娟罗益民蔡建武 School of Material Science and Engineering Central South University School of Physics Science and Technology Central South University Department of Physics Hunan Industrial University

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.

关键词： trapped ions quantum phase gate swap gate beyond the Lamb Dicke limit

Quantum Nondemolition Measurement of the Collective Motional Energy of Two trapped ions

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2002年第4期37卷 479-482页

作者： ZHENGShi－Biao DepartmentofElectronicScienceandAppliedPhysics FuzhouUniversityFuzhou350002China

We propose a quantum nondemolition measurement of the collective motional energy of two trapped ions for the first *** is based on the excitation of the two ions by two lasers with appropriate frequencies and *** sche... 详细信息

关键词： quantum nondemolition measurement collective motional energy trapped ions

Motional Quantum-State Engineering and Implementation of a Quantum Phase-Gate for Multiple trapped ions

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2006年第2X期46卷 297-302页

作者： YANG Wen-Xing State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Center for Cold Atom Physics Wuhan Institute of Physics and Mathematics the Chinese Academy of Sciences Wuhan 430071 China Guaduate School of the Chinese Academy of Sciences Beijing 100049 China

We propose a scheme to generate a superposition of motional coherent states with arbitrary coefficients on a line in phase space and implement a quantum controlled phase-gate for multiple trapped ions with a single standing-wave laser pulse whose carrier frequency is tuned to the ions transition. In the scheme each ion does not need to be exactly positioned at the node of the standing wave, which is very important from viewpoint of experiment, Furthermore, our scheme may allow the generation of a superposition of coherent states with large mean phonon number for a large number of trapped ions in a fast way by choosing suitable laser intensity. We show that it can also be used to generate maximally entangled states of multiple trapped ions.

关键词： quantum-state engineering quantum computation trapped ions

Geometric Phases for Mixed States in trapped ions

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2006年第3X期46卷 423-428页

作者： LU Hong-Xia Department of Physics and Electronics Huaiyin Teachers College Huaian 213001 China

The generalization of geometric phase from the pure states to the mixed states may have potential applications in constructing geometric quantum gates. We here investigate the mixed state geometric phases and visibilities of the trapped ion system in both non-degenerate and degenerate cases. In the proposed quantum system, the geometric phases are determined by the evolution time, the initial states of trapped ions, and the initial states of photons. Moreover, special periods are gained under which the geometric phases do not change with the initial states changing of photon parts in both non-degenerate and degenerate cases. The high detection efficiency in the ion trap system implies that the mixed state geometric phases proposed here can be easily tested.

关键词： geometric phase mixed state trapped ions

Two Schemes for Generation of Entanglement for Vibronic Collective States of Multiple trapped ions

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2007年第3期47卷 421-426页

作者： YANG Wen-Xing LI Jia-Hua ZHNG An-Shou Department of Physics Southeast University NanJing 210096 China Molecular Physics Center for Cold Atom Physics Wuhan Institute of Physics and Mathematics the Chinese Academy of Sciences Wuhan 430071 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China Department of Physics Huazhong University of Science and Technology Wuhan 430074 China

We propose two schemes to prepare entanglement for the vibronic collective states of multiple trapped ions. The first scheme aims to generating multipartite entanglement for vibrational modes of trapped ions, which only requires a single laser beam tuned to the ionic carrier frequency. Our scheme works in the mediated excitation regime, in which the corresponding Rabi frequency is equal to the trap frequency. Beyond their fundamental importance, these states may be of interest for experimental studies on decoherence since the present scheme operates in a fast way. The second scheme aims to preparing the continuous variable multimode maximal1y Greenberger-Horne-Zeilinger state. The distinct advantage is that the operation time is only limited by the available laser intensity, not by the inherent mechanisms such as off-resonant excitations. This makes it promising to obtain entanglernent of multiple coherent and squeezing states with desired amplitudes in a reasonable time.

关键词： multipartite entanglement GHZ state trapped ions

Telecloning Quantum States with trapped ions

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2007年第5X期48卷 827-830页

作者： YANG Rong-Can LI Hong-Cai LIN Xiu HUANG Zhi-Ping School of Physics and OptoElectronics Technology Fujian Normal University Fuzhou 350007 China

We propose a scheme for telecloning quantum states with trapped ions. The scheme is based on a single ion interacting with a single laser pulse. In the protocol, an ion is firstly measured to determine whether the telecloning succeeds or not, and then another ion is detected to complete the whole procedure. The required experimental techniques are within the scope of what can be obtained in the ion-trap setup.

关键词： telecloning W states state-dependent trapped ions

Scheme for Implementation of Ancillary-Free 1→3 Optimal Phase-Covariant Quantum Cloning with trapped ions

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2008年第6期49卷 1499-1501页

作者： YANG Rong-Can LI Hong-Cai LIN Xiu HUANG Zhi-Ping XIE Hong School of Physics and Opto-Electronics Technology Fujian Normal University Fuzhou 350007 China

We propose a simple scheme for the implementation of the ancillary-free 1→3 optimal phase-covariant quantum cloning for x-y equatorial qubits in ion-trap system. In the scheme, the vibrational mode is only virtually excited, which is very important in view of decoherence. The present proposal can be realized based on current available technologies.

关键词： ancillary-free phase-covariant quantum cloning trapped ions

Teleportation of an Unknown Entangled State in trapped ions

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2007年第7期48卷 87-89页

作者： CHEN Mei-Feng MA Song-She Department of Electronic Science and Applied Physics,Fuzhou University,Fuzhou 350002,China Department of Electronic Science and Applied Physics Fuzhou University

A scheme is presented for teleportation of an unknown entangled ionic state between ions kept in two wellseparated traps,which is induced by means of two dispersive laser *** scheme is insensitive to the thermalmotion... 详细信息

关键词： teleportation entangled state trapped ions