Quantum Measurement Operations with Nanomagnets and SQUIDs
Mesoscale and Nanoscale Physics
2007-05-23 v1
Abstract
The low-energy behaviour of 2 coupled nanomagnets or 2 coupled SQUIDs, interacting with their environment, can be described by the model of a ``Pair or Interacting Spins Coupled to an Environmental Sea'' (PISCES). These physical systems can then be used for a measurement operation in which system, apparatus and environment are all treated quantum mechanically. We design a ``Bell/Coleman-Hepp'' measuring system, and show that in principle one may design a situation in which quantum interference between system and apparatus can upset the usual measurement operation.
Cite
@article{arxiv.cond-mat/9908424,
title = {Quantum Measurement Operations with Nanomagnets and SQUIDs},
author = {M. Dube and P. C. E. Stamp},
journal= {arXiv preprint arXiv:cond-mat/9908424},
year = {2007}
}
Comments
6 pages, 1 figure