2005/07/08 by William Gordon Ritter
Chemistry · Computer Science · Physics and Astronomy · #Molecular spectroscopy and chirality #Quantum Information and Cryptography #Quantum Mechanics and Applications #quant-ph
paper · pdf · doi:10.1103/physreva.72.012305
published as Phys. Rev. A 72, 012305 (2005) · 7 pages
openalex publication_date 2005/07/08 · arxiv created 2005/08/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Since there are many examples in which no decoherence-free subsystems exist (among them all cases where the error generators act irreducibly on the system Hilbert space), it is of interest to search for novel mechanisms which suppress decoherence in these more general cases. Drawing on recent work (quant-ph/0502153) we present three results which indicate decoherence suppression without the need for noiseless subsystems. There is a certain trade-off; our results do not necessarily apply to an arbitrary initial density matrix or for completely generic noise parameters. On the other hand, our computational methods are novel and the result---suppression of decoherence in the error-algebra approach without noiseless subsystems---is an interesting new direction.