Decoherence in a scalable adiabatic quantum computer

被引：72

作者：

Ashhab, S. ^{[1
]}

Johansson, J. R.

Nori, Franco

机构：

[1] RIKEN, Inst Phys & Chem Res, Frontier Res Syst, Wako, Saitama 35101, Japan

[2] Univ Michigan, Dept Phys, CSCS, Ctr Theoret Phys, Ann Arbor, MI 48109 USA

来源：

PHYSICAL REVIEW A | 2006年 / 74卷 / 05期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevA.74.052330

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We consider the effects of decoherence on Landau-Zener crossings encountered in a large-scale adiabatic-quantum-computing setup. We analyze the dependence of the success probability-i.e., the probability for the system to end up in its new ground state-on the noise amplitude and correlation time. We determine the optimal sweep rate that is required to maximize the success probability. We then discuss the scaling of decoherence effects with increasing system size. We find that those effects can be important for large systems, even if they are small for each of the small building blocks.

引用

页数：6

共 30 条

[1]

ANKERHOLD J, 2005, PHYS REV LETT, V91, P6803

[2] INFLUENCE OF DISSIPATION ON THE LANDAU-ZENER TRANSITION [J].

AO, P ;

RAMMER, J .

PHYSICAL REVIEW LETTERS, 1989, 62 (25) :3004-3007

[3] Robustness of adiabatic quantum computation [J].

Childs, AM ;

Farhi, E ;

Preskill, J .

PHYSICAL REVIEW A, 2002, 65 (01) :123221-1232210

[4] Analog analogue of a digital quantum computation [J].

Farhi, E ;

Gutmann, S .

PHYSICAL REVIEW A, 1998, 57 (04) :2403-2406

[5]

FARHI E, QUANTPH0001106

[6] Adiabatic quantum computing for random satisfiability problems [J].

Hogg, T .

PHYSICAL REVIEW A, 2003, 67 (02) :7

[7] Observation of macroscopic Landau-Zener transitions in a superconducting device [J].

Izmalkov, A ;

Grajcar, M ;

Il'Ichev, E ;

Oukhanski, N ;

Wagner, T ;

Meyer, HG ;

Krech, W ;

Amin, MHS ;

Van Den Brink, AM ;

Zagoskin, AM .

EUROPHYSICS LETTERS, 2004, 65 (06) :844-849

[8]

KAYANUMA Y, 1984, J PHYS SOC JPN, V53, P108, DOI 10.1143/JPSJ.53.108

[9]

KAYANUMA Y, 1984, J PHYS SOC JPN, V53, P118, DOI 10.1143/JPSJ.53.118

[10]

Landau L., 1932, Phys. Z. Sowjetunion, V2, P118, DOI DOI 10.1098/RSPA.1932.0165

← 1 2 3 →