Optimizing a phase gate using quantum interference

被引:52
作者
Charron, E
Tiesinga, E
Mies, F
Williams, C
机构
[1] Univ Paris 11, CNRS, Photophys Mol Lab, F-91405 Orsay, France
[2] NIST, Atom Phys Div, Gaithersburg, MD 20899 USA
关键词
D O I
10.1103/PhysRevLett.88.077901
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A controlled interference is proposed to reduce, by two orders of magnitude, the decoherence of a quantum gate for which the gate fidelity is limited by coupling to states other than the \0] and \1] qubit states. This phenomenon is demonstrated in an ultracold neutral atom implementation of a phase gate using qubits based on motional states in individual wells of an optical lattice.
引用
收藏
页码:779011 / 779014
页数:4
相关论文
共 25 条
[1]  
[Anonymous], P 35 ANN S FDN COMP
[2]  
Brankin R., 1993, Contributions in Numerical Mathematics, P41
[3]   Quantum logic gates in optical lattices [J].
Brennen, GK ;
Caves, CM ;
Jessen, PS ;
Deutsch, IH .
PHYSICAL REVIEW LETTERS, 1999, 82 (05) :1060-1063
[4]   Entangling dipole-dipole interactions for quantum logic with neutral atoms [J].
Brennen, GK ;
Deutsch, IH ;
Jessen, PS .
PHYSICAL REVIEW A, 2000, 61 (06) :10
[5]   Two cold atoms in a harmonic trap [J].
Busch, T ;
Englert, BG ;
Rzazewski, K ;
Wilkens, M .
FOUNDATIONS OF PHYSICS, 1998, 28 (04) :549-559
[6]   Quantum gates with neutral atoms: Controlling collisional interactions in time-dependent traps [J].
Calarco, T ;
Hinds, EA ;
Jaksch, D ;
Schmiedmayer, J ;
Cirac, JI ;
Zoller, P .
PHYSICAL REVIEW A, 2000, 61 (02) :11
[7]   QUANTUM COMPUTATIONS WITH COLD TRAPPED IONS [J].
CIRAC, JI ;
ZOLLER, P .
PHYSICAL REVIEW LETTERS, 1995, 74 (20) :4091-4094
[8]   A scalable quantum computer with ions in an array of microtraps [J].
Cirac, JI ;
Zoller, P .
NATURE, 2000, 404 (6778) :579-581
[9]  
DiVincenzo DP, 2000, FORTSCHR PHYS, V48, P771, DOI 10.1002/1521-3978(200009)48:9/11<771::AID-PROP771>3.0.CO
[10]  
2-E