利用超导量子相干装置一步制备W类纠缠态

J4 ›› 2010, Vol. 27 ›› Issue (3): 314-318.

利用超导量子相干装置一步制备W类纠缠态

丁智勇,何娟,吴韬

阜阳师范学院物理与电子科学学院，安徽阜阳 236029

收稿日期:2009-10-26 修回日期:2009-12-28 出版日期:2010-05-28 发布日期:2010-05-11
通讯作者: 丁智勇（1980－），男，汉族，安徽无为人，阜阳师范学院物电学院讲师，主要研究领域为量子物理。 E-mail:dzy_8012@163.com
作者简介:丁智勇（1980－），男，汉族，安徽无为人，阜阳师范学院物电学院讲师，主要研究领域为量子物理。E-mail：dzy_8012@163.com。
基金资助:
安徽省高等学校优秀青年人才基金项目（2008jq1118、2009SQRZ152），安徽省教育厅自然科学研究项目（KJ2009B003），阜阳师范学院自然科学研究重点项目（2008LZ01），阜阳师范学院自然科学研究青年项目（2008LQ04）。

One step for generation of W-class states via superconducting quantum interference devices

DING Zhi-Yong, HE Juan, WU Tao

School of Physics and Electronic Science, Fuyang Normal College, Fuyang 236029, China

Received:2009-10-26 Revised:2009-12-28 Published:2010-05-28 Online:2010-05-11

摘要/Abstract

摘要：

鉴于一种新形式的W类纠缠态作为纠缠通道可以实现概率为100%的量子隐形传态和密集编码的特殊优势，我们提出一个基于超导量子相干装置在单模谐振腔中制备该W类纠缠态的方案。在这个方案里，只需利用超导量子相干装置和腔场发生共振相互作用，一步便可制备W类纠缠态。在目前的腔QED技术条件下, 该方案是可以实现的。

关键词: 量子信息∣W类纠缠态∣超导量子相干装置∣共振

Abstract:

A scheme for generation a class of W entangled state is presented. This paper relies on the superconducting quantum interference devices (SQUIDs) simultaneously interact with single-mode cavity field under resonant circumstances. The distinct feature of this paper lies in that the whole course of preparation only for one step. The scheme can be implemented by the present cavity QED techniques.

Key words: quantum information∣W-class state∣SQUIDs∣resonant

丁智勇何娟吴韬. 利用超导量子相干装置一步制备W类纠缠态[J]. J4, 2010, 27(3): 314-318.

DING Zhi-Yong, HE Juan, WU Tao. One step for generation of W-class states via superconducting quantum interference devices[J]. J4, 2010, 27(3): 314-318.

参考文献

[1] Einstein A, Podolsky B, and Rosen N. Can quantumn-mechanical description of physical reality be considered complete? [J]. Phys. Rev., 1935, 47: 777-780.
[2] Bell J S , Physics( Long Island City, N.Y.) 1, 195(1965).
[3] Bennett C H, Brassard G, Crepeau C, Jozsa R, Peres A, and Wootters W K. Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels [J]. Phys. Rev. Lett., 1993, 70: 1895-1899.
[4] Ekert A K. Quantum cryptography based on Bell’s theorem [J]. Phys. Rev. Lett., 1991, 67: 661-663.
[5] Bennett C H, and Wiesner S J. Communication via one- and two-particle operators on Einstein-Podolsky-Rosen states [J]. Phys. Rev. Lett., 1992, 69: 2881-2884.
[6] Zhang S J, MA C, Ye L. Generation of N-qubit cluster states via nonresonant cavity QED and meanwhile driven by a classical field [J]. Chinese Journal of quantum electronics(量子电子学报). 2008,25(3): 328
[7] Tao R, Zheng X H, Cao Z L. A scheme for generating cluster state with Josephson charge qubit [J]. Chinese Journal of quantum electronics(量子电子学报). 2009, 26(5): 570
[8] Karlsson A, Bourennane M. Quantum teleportation using three-particle entanglement [J]. Phys. Rev. A., 1998, 58: 4394~4400.
[9] Dür W, Vidal G, and Cirac J I. Three qubits can be entangled in two inequivalent ways [J]. Phys. Rev. A., 2000, 62: 062314.
[10] Guo G C, Zhang Y S. Scheme for preparation of the W state via cavity quantum electrodynamics[J]. Phys. Rev. A., 2002, 65:054302.
[11] Gorbachev V N, et al. Can the states of the W-class be suitable for teleportation? [J]. Phys. Lett. A .,2003, 314: 267-271.
[12] Deng Z J, Feng M, and Gao K L. Simple scheme for generation an n-qubit W state in cavity QED [J]. Phys. Rev. A., 2006, 73: 014302.
[13] Shi B S, Tomita A. Teleportation of an unknown state by W state [J]. Phys.Lett. A., 2002, 296: 161-164.
[14] Agrawal P, Pati A. Perfect teleportation and superdense coding with W states [J]. Phys. Rev. A., 2006, 74: 062320.
[15] Cabrillo C, Cirac J I, Fernandez P G, and Zoller P. Creation of entangled states of distant atoms by interference [J]. Phys. Rev. A., 1999, 59, 1025
[16] Gershenfield N A, Chuang I L [J]. Science 1997, 275, 350
[17] Guo G P, Li C F, Li J, and Guo G C. Scheme for the preparation of multiparticle entanglement in cavity QED [J]. Phys. Rev. A. , 2002, 65, 042102.
[18] Yang C P, Chu S I, and Han Siyuan, Quantum Information Transfer with SQUID Qubits in cavity QED: A Dark-State Scheme with Tolerance for Nonuniform Device Parameter [J]. Phys. Rev. Lett., 2004, 92: 117902.
[19] Kis Z, Paspalakis E. Arbitrary rotation and entanglement of flux SQUID qubits [J]. Phys. Rev. B., 2004, 69: 024510.
[20] Wang X B, Keiji M. Nonadiabatic detection of the geometric phase of the macroscopic quantum state with a symmetric SQUID [J]. Phys. Rev. B., 2002, 65: 172508.
[21] Blais A, Zagoskin A M. Operation of universal gates in a solid-state quantum computer based on clean Josephson junctions between d-wave superconductors [J]. Phys. Rev. A., 2000, 61: 042308.
[22] Yu Y, Han S, Chu X, Chu S-I, and Wang, Coherent Temporal Oscillations of Macroscopic Quantum States in a Josephson Junction [J]. Science, 2002, 296, 889.
[23] Chiorescu I, Nakamura Y, Harmans C J P M, and Mooij J E. Coherent Quantum Dynamics of a Superconducting Flux Qubit [J]. Science, 2003, 299, 1869.
[24] Han S, Rouse R, and Lukens J E. Generation of a Population Inversion between Quantum States of a Macroscopic Variable [J]. Phys. Rev. Lett., 1996, 76: 3404-3407.
[25] Chen C Y, Feng M, and Gao K L. Toffoli gate originating from a single resonant interaction with cavity QED [J]. Phys. Rev. A., 2006, 73: 064304.
[26] Zhou Z, Chu S-I, Han S. Quantum computing with superconducting devices: A three-level SQUID qubit [J]. Phys. Rev. B., 2002, 66: 054527. [27] Brune M, Hagley E, Dreyer J, et al. Observing the progressive decoherence of the “Meter” in a quantum measurement [J]. Phys. Rev. Lett., 1996, 77: 4887.