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Title: Resonant purification of mixed states for closed and open quantum systems

Abstract

Pure states are fundamental for the implementation of quantum technologies, and several methods for the purification of the state of a quantum system S have been developed in the past years. In this work we describe a mechanism leading to purification of mixed states, based on the interaction of S with an auxiliary system P. Considering two-level systems and assuming a particular interaction between them, we study how the dynamical parameters of the system P affect the purification of S. By using analytical and numerical tools, we show that the purification process exhibits a resonant behavior in both the cases of system isolated from the external environment or not.

Authors:
 [1];  [2]
  1. Department of Mathematics, Iowa State University, Ames, Iowa 50011 (United States)
  2. (Trieste) (Italy)
Publication Date:
OSTI Identifier:
20982196
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 75; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevA.75.024301; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AUXILIARY SYSTEMS; IMPLEMENTATION; INTERACTIONS; MIXED STATE; PURIFICATION; QUANTUM COMPUTERS; QUANTUM ENTANGLEMENT; QUANTUM MECHANICS

Citation Formats

Romano, Raffaele, and The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, I-34014 Miramare - Grignano. Resonant purification of mixed states for closed and open quantum systems. United States: N. p., 2007. Web. doi:10.1103/PHYSREVA.75.024301.
Romano, Raffaele, & The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, I-34014 Miramare - Grignano. Resonant purification of mixed states for closed and open quantum systems. United States. doi:10.1103/PHYSREVA.75.024301.
Romano, Raffaele, and The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, I-34014 Miramare - Grignano. Thu . "Resonant purification of mixed states for closed and open quantum systems". United States. doi:10.1103/PHYSREVA.75.024301.
@article{osti_20982196,
title = {Resonant purification of mixed states for closed and open quantum systems},
author = {Romano, Raffaele and The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, I-34014 Miramare - Grignano},
abstractNote = {Pure states are fundamental for the implementation of quantum technologies, and several methods for the purification of the state of a quantum system S have been developed in the past years. In this work we describe a mechanism leading to purification of mixed states, based on the interaction of S with an auxiliary system P. Considering two-level systems and assuming a particular interaction between them, we study how the dynamical parameters of the system P affect the purification of S. By using analytical and numerical tools, we show that the purification process exhibits a resonant behavior in both the cases of system isolated from the external environment or not.},
doi = {10.1103/PHYSREVA.75.024301},
journal = {Physical Review. A},
number = 2,
volume = 75,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}