Thermal States as Universal Resources for Quantum Computation with Always-On Interactions

被引：35

作者：

Li, Ying ^{[1
]}

Browne, Daniel E. ^{[1
,2
]}

Kwek, Leong Chuan ^{[1
,3
,4
]}

Raussendorf, Robert ^{[5
]}

Wei, Tzu-Chieh ^{[5
]}

机构：

[1] Natl Univ Singapore, Ctr Quantum Technol, Singapore 117548, Singapore

[2] UCL, Dept Phys & Astron, London WC1E 6BT, England

[3] Nanyang Technol Univ, Natl Inst Educ, Singapore, Singapore

[4] Nanyang Technol Univ, Inst Adv Studies, Singapore, Singapore

[5] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 06期

基金：

新加坡国家研究基金会; 加拿大自然科学与工程研究理事会;

关键词：

BOND GROUND-STATES; TRAPPED IONS; ANTIFERROMAGNETS; COMPUTER; PHYSICS; GASES; PHASE;

D O I：

10.1103/PhysRevLett.107.060501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Measurement-based quantum computation utilizes an initial entangled resource state and proceeds with subsequent single-qubit measurements. It is implicitly assumed that the interactions between qubits can be switched off so that the dynamics of the measured qubits do not affect the computation. By proposing a model spin Hamiltonian, we demonstrate that measurement-based quantum computation can be achieved on a thermal state with always-on interactions. Moreover, computational errors induced by thermal fluctuations can be corrected and thus the computation can be executed fault tolerantly if the temperature is below a threshold value.

引用

页数：4

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