NDLI: Universal Controlled-Phase Gates Between Distant Atoms Separately Trapped in Thermal Cavities

Content Provider	Springer Nature Link
Author	Wang, Dong Ye, Liu
Copyright Year	2014
Abstract	Nonlocal implementation of a family of universal two-qubit controlled-phase gates is investigated in the regime of cavity quantum electrodynamics (CQED) system. With the driving of classical field, the atoms taken as qubits can be efficiently coupled to thermal cavities. In the course of the implementation, atomic spontaneous emission and cavity decay are negligible. With the help of quantum repeaters, our proposal can accomplish entanglement-based a family of universal controlled-phase logic gates for remote two atoms with high fidelity and success probability. Remarkably, our proposal is able to break through the limitation that error probability scales exponentially with the length of the channel. Furthermore, experimental feasibility of the scenario presented is evaluated and it turns out that it is realizable according to today’s CQED technologies. It is here emphasised that our proposal might be important to long-distance communication in prospective quantum multi-node networks.
Starting Page	1380
Ending Page	1387
Page Count	8
File Format	PDF
ISSN	00207748
Journal	International Journal of Theoretical Physics
Volume Number	54
Issue Number	4
e-ISSN	15729575
Language	English
Publisher	Springer US
Publisher Date	2014-09-21
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Controlled-phase gate CQED Entanglement Quantum repeater Physics Quantum Physics Elementary Particles, Quantum Field Theory Theoretical, Mathematical and Computational Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Mathematics

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