Controllable manipulation and entanglement of macroscopic quantum states in coupled charge qubits

被引：125
作者：
You, JQ
Tsai, JS
Nori, F [1 ]
机构：
[1] Inst Phys & Chem Res, Wako, Saitama 3510198, Japan
[2] NEC Corp Ltd, Fundamental Res Labs, Tsukuba, Ibaraki 3058051, Japan
[3] Univ Michigan, Ctr Study Complex Syst, Dept Phys, Ctr Theoret Phys, Ann Arbor, MI 48109 USA
来源：
PHYSICAL REVIEW B | 2003年 / 68卷 / 02期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevB.68.024510
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present an experimentally implementable method to couple Josephson charge qubits and to generate and detect macroscopic entangled states. A large-junction superconducting quantum interference device is used in the qubit circuit for both coupling qubits and implementing the readout. Also, we explicitly show how to achieve a microwave-assisted macroscopic entanglement in the coupled-qubit system.
引用
收藏
页数：8
相关论文
共 25 条
  • [1] Entanglement and decoherence of a micromechanical resonator via coupling to a Cooper-pair box
    Armour, AD
    Blencowe, MP
    Schwab, KC
    [J]. PHYSICAL REVIEW LETTERS, 2002, 88 (14) : 148301/1 - 148301/4
  • [2] AVERIN DV, CONDMAT0304166
  • [3] Tunable coupling of superconducting qubits
    Blais, A
    van den Brink, AM
    Zagoskin, AM
    [J]. PHYSICAL REVIEW LETTERS, 2003, 90 (12) : 4
  • [4] BUISSON O, 2001, MACROSCOPIC QUANTUM, P137
  • [5] Implementation of a combined charge-phase quantum bit in a superconducting circuit
    Cottet, A
    Vion, D
    Aassime, A
    Joyez, P
    Esteve, D
    Devoret, MH
    [J]. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2002, 367 (1-4): : 197 - 203
  • [6] Quantum superposition of distinct macroscopic states
    Friedman, JR
    Patel, V
    Chen, W
    Tolpygo, SK
    Lukens, JE
    [J]. NATURE, 2000, 406 (6791) : 43 - 46
  • [7] HEKKING FWJ, CONDMAT0201284
  • [8] Quantum-state engineering with Josephson-junction devices
    Makhlin, Y
    Schön, G
    Shnirman, A
    [J]. REVIEWS OF MODERN PHYSICS, 2001, 73 (02) : 357 - 400
  • [9] Josephson-junction qubits with controlled couplings
    Makhlin, Y
    Schön, G
    Shnirman, A
    [J]. NATURE, 1999, 398 (6725) : 305 - 307
  • [10] Superposition of two mesoscopically distinct quantum states: Coupling a Cooper-pair box to a large superconducting island
    Marquardt, F
    Bruder, C
    [J]. PHYSICAL REVIEW B, 2001, 63 (05):
123