Decoherence and measurement in open quantum systems

Vladimir Privman; Dima V. Mozyrsky

doi:10.1117/12.391966

13 July 2000 Decoherence and measurement in open quantum systems

Vladimir Privman, Dima V. Mozyrsky

Proceedings Volume 4047, Quantum Computing; (2000) https://doi.org/10.1117/12.391966
Event: AeroSense 2000, 2000, Orlando, FL, United States

Abstract

We review results of a recently developed model of a microscopic quantum system interacting with the macroscopic world components which are modeled by collections of bosonic modes. The interaction is via a general operator (Lambda) of the system, coupled to the creation and annihilation operators of the environment modes. We assume that in the process of a nearly instantaneous quantum measurement, the function of the environment involves two distinct parts: the pointer and the bath. Interaction of the system with the bath leads to decoherence such that the system and the pointer both evolve into a statistical mixture state described by the density matrix such that the system is in one of the eigenstates of (Lambda) with the correct quantum mechanical probability, whereas the expectation values of pointer operators retain amplified information on that eigenstate. We argue that this process represents the initial step of a quantum measurement.

Citation Download Citation

Vladimir Privman and Dima V. Mozyrsky "Decoherence and measurement in open quantum systems", Proc. SPIE 4047, Quantum Computing, (13 July 2000); https://doi.org/10.1117/12.391966

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available