1998/11/04 by J. Steinbach, Jörg Steinbach, Steinbach, J. +3
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum Physics (quant-ph) #quant-ph
paper · pdf · doi:10.48550/arxiv.quant-ph/9811011
24 Pages, RevTex, also see http://www.thphys.may.ie/jtwamley/jtwamley.html Submitted to PRA. (CHANGED to two-column style)
openalex publication_date 1998/11/04 · arxiv created 1998/11/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We examine the dynamics of a qubit stored in the motional degrees of freedom of an ultra-cold ion in an ion trap which is subject to the decoherence effects of a finite-temperature bath. We discover an encoding of the qubit, in two of the motional modes of the ion, which is stable against the occurrence of either none or one quantum jump. For the case of a zero-temperature bath we describe how to transfer only the information concerning the occurrence of quantum jumps and their types to a measuring apparatus, without affecting the ion's motional state significantly. We then describe how to generate a unitary restoration of the qubit given the jump information, through Raman processes generated by a series of laser pulses.