Possible realization of Josephson charge qubits in two coupled Bose-Einstein condensates

被引：15

作者：

Chen, ZB ^{[1
]}

Zhang, YD

机构：

[1] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China

[2] CCAST, World Lab, Beijing 100080, Peoples R China

来源：

PHYSICAL REVIEW A | 2002年 / 65卷 / 02期

关键词：

D O I：

10.1103/PhysRevA.65.022318

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate that two coupled Bose-Einstein condensates (BECs) at zero temperature can be used to realize a qubit which is the counterpart of Josephson charge qubits. The two BECs are weakly coupled and confined in an asymmetric double-well trap. When the "charging energy" of the system is much larger than the Josephson energy and the system is biased near a degeneracy point, the two BECs represent a qubit with two states differing only by one atom. The realization of the BEC qubits in realistic BEC experiments is briefly discussed.

引用

页数：4

共 45 条

[21] OSCILLATORY EXCHANGE OF ATOMS BETWEEN TRAPS CONTAINING BOSE CONDENSATES [J].

JAVANAINEN, J .

PHYSICAL REVIEW LETTERS, 1986, 57 (25) :3164-3166

[22] A silicon-based nuclear spin quantum computer [J].

Kane, BE .

NATURE, 1998, 393 (6681) :133-137

[23] Quantum statistics and dynamics of Kerr nonlinear couplers [J].

Korolkova, N ;

Perina, J .

OPTICS COMMUNICATIONS, 1997, 136 (1-2) :135-149

[24] Deterministic delivery of a single atom [J].

Kuhr, S ;

Alt, W ;

Schrader, D ;

Müller, M ;

Gomer, V ;

Meschede, D .

SCIENCE, 2001, 293 (5528) :278-280

[25] Bose-Einstein condensation in the alkali gases: Some fundamental concepts [J].

Leggett, AJ .

REVIEWS OF MODERN PHYSICS, 2001, 73 (02) :307-356

[26] Quantum computation with quantum dots [J].

Loss, D ;

DiVincenzo, DP .

PHYSICAL REVIEW A, 1998, 57 (01) :120-126

[27] PHASE-DIFFERENCE OPERATOR [J].

LUIS, A ;

SANCHEZSOTO, LL .

PHYSICAL REVIEW A, 1993, 48 (06) :4702-4708

[28] Quantum-state engineering with Josephson-junction devices [J].

Makhlin, Y ;

Schön, G ;

Shnirman, A .

REVIEWS OF MODERN PHYSICS, 2001, 73 (02) :357-400

[29] Josephson-junction qubits with controlled couplings [J].

Makhlin, Y ;

Schön, G ;

Shnirman, A .

NATURE, 1999, 398 (6725) :305-307

[30] Quantum dynamics of an atomic Bose-Einstein condensate in a double-well potential [J].

Milburn, GJ ;

Corney, J ;

Wright, EM ;

Walls, DF .

PHYSICAL REVIEW A, 1997, 55 (06) :4318-4324

← 1 2 3 4 5 →