Optimal working point in dissipative quantum annealing

被引：23
作者：
Arceci, Luca [1 ]
Barbarino, Simone [1 ]
Rossini, Davide [2 ,3 ]
Santoro, Giuseppe E. [1 ,4 ,5 ]
机构：
[1] SISSA, Via Bonomea 265, I-34136 Trieste, Italy
[2] Univ Pisa, Dipartimento Fis, Largo Pontecorvo 3, I-56127 Pisa, Italy
[3] Ist Nazl Fis Nucl, Largo Pontecorvo 3, I-56127 Pisa, Italy
[4] CNR IOM Democritos Natl Simulat Ctr, Via Bonomea 265, I-34136 Trieste, Italy
[5] Abdus Salaam Int Ctr Theoret Phys, POB 586, I-34014 Trieste, Italy
来源：
PHYSICAL REVIEW B | 2018年 / 98卷 / 06期
关键词：
ISING-MODEL; ADIABATIC EVOLUTION; SPIN-GLASS; SYSTEMS; ALGORITHM; DYNAMICS;
D O I：
10.1103/PhysRevB.98.064307
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study the effect of a thermal environment on the quantum annealing dynamics of a transverse-field Ising chain. The environment is modeled as a single Ohmic bath of quantum harmonic oscillators weakly interacting with the total transverse magnetization of the chain in a translationally invariant manner. We show that the density of defects generated at the end of the annealing process displays a minimum as a function of the annealing time, the so-called optimal working point, only in rather special regions of the bath temperature and coupling strength plane. We discuss the relevance of our results for current and future experimental implementations with quantum annealing hardware.
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页数：11
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