Thermalizing quantum machines: Dissipation and entanglement

被引：248

作者：

Scarani, V

Ziman, M

Stelmachovic, P

Gisin, N

Buzek, V

机构：

[1] Univ Geneva, Appl Phys Grp, CH-1211 Geneva 4, Switzerland

[2] Slovak Acad Sci, Res Ctr Quantum Informat, Bratislava 84228, Slovakia

[3] Masaryk Univ, Fac Informat, Brno 60200, Czech Republic

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 09期

关键词：

Data processing - Eigenvalues and eigenfunctions - Hamiltonians - Information theory - Optimization - Theorem proving - Thermal effects - Thermodynamics;

D O I：

10.1103/PhysRevLett.88.097905

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the relaxation of a quantum system towards the thermal equilibrium using tools developed within the context of quantum information theory. We consider a model in which the system is a qubit, and reaches equilibrium after several successive two-qubit interactions (thermalizing machines) with qubits of a reservoir. We characterize completely the family of thermalizing machines. The model shows a tight link between dissipation, fluctuations, and the maximal entanglement that can be generated by the machines. The interplay of quantum and classical information processes that give rise to practical irreversibility is discussed.

引用

页码：979051 / 979054

页数：4

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