Geometric phase gate for entangling two Bose-Einstein condensates

被引：20

作者：

Hussain, Mahmood Irtiza ^{[1
,2
]}

Ilo-Okeke, Ebubechukwu O. ^{[3
,4
]}

Byrnes, Tim ^{[4
]}

机构：

[1] Peking Univ, Sch Elect Engn & Comp Sci, State Key Lab Adv Opt Commun Syst & Networks, Beijing 100871, Peoples R China

[2] Griffith Univ, Ctr Quantum Dynam, Nathan, Qld 4111, Australia

[3] Fed Univ Technol Owerri, Dept Phys, Owerri, Imo State, Nigeria

[4] Natl Inst Informat, Chiyoda Ku, Tokyo 1018430, Japan

来源：

PHYSICAL REVIEW A | 2014年 / 89卷 / 05期

基金：

中国国家自然科学基金;

关键词：

QUANTUM TELEPORTATION; ATOM-CHIP; ENTANGLEMENT; CAVITY; STATE; COMMUNICATION; GENERATION; COHERENCE; PARTICLE; OBJECTS;

D O I：

10.1103/PhysRevA.89.053607

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose a method of entangling two spinor Bose-Einstein condensates using a geometric phase gate. The scheme relies upon only the ac Stark shift and a common controllable optical mode coupled to the spins. Our scheme allows for the creation of an (SSz)-S-z-type interaction where S-z is the total spin. The geometric phase gate can be executed in times of the order of 2 pi(sic)/G, where G is the magnitude of the Stark shift. In contrast to related schemes which relied on a fourth-order interaction to produce entanglement, this is a second-order interaction in the number of atomic transitions. Closed expressions for the entangling phase are derived and the effects of decoherence due to cavity decay, spontaneous emission, and incomplete de-entangling of the light to the Bose-Einstein condensates are analyzed.

引用

页数：7

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