2003/04/02 by K. M. Fonseca-Romero, K. M. Fonseca Romero, Romero, K. M. Fonseca +7
Computer Science · Physics and Astronomy · #Blockchain Technology Applications and Security #Cryptography and Data Security #FOS: Physical sciences #Quantum Physics (quant-ph) #quant-ph
paper · pdf · doi:10.48550/arxiv.quant-ph/0304018
9 pages, no figures, submitted to Phys. Rev. A. This is a completelly rewritten and expanded version of quant-ph/0202031
arxiv created 2003/04/02 · openalex publication_date 2003/04/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Decoherence free subspaces (DFS) is a theoretical tool towards experimental implementation of quantum information storage and processing. However, they represent an experimental challenge, since conditions for their existence are very stringent. This work explores the situation in which a system of N oscillators coupled to a bath of harmonic oscillators is close to satisfy the conditions for the existence of DFS. We show, in the Born-Markov limit and for small deviations from separability and degeneracy conditions, that there are weak decoherence subspaces which resemble the original notion of DFS.