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Quantum Physics

arXiv:1311.3100 (quant-ph)
[Submitted on 13 Nov 2013 (v1), last revised 12 Jul 2014 (this version, v4)]

Title:Controlling the coherence in a pure dephasing model for an arbitrarily prescribed time span

Authors:Lucio Fassarella
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Abstract:We present an open-loop unitary strategy to control the coherence in a pure dephasing model (related to the phase-flip channel) that is able to recover, for whatever prescribed time span, the initial coherence at the end of the control process. The strategy's key idea is to steer the quantum state to the subset of invariant states and keep it there the necessary time, using a fine tuned control Hamiltonian.
Comments: 11 pages, 1 figure. Corrections and improvements on the previous version
Subjects: Quantum Physics (quant-ph); Optimization and Control (math.OC)
Cite as: arXiv:1311.3100 [quant-ph]
  (or arXiv:1311.3100v4 [quant-ph] for this version)
  https://doi.org/10.48550/arXiv.1311.3100

Submission history

From: Lucio Fassarella [view email]
[v1] Wed, 13 Nov 2013 12:15:38 UTC (27 KB)
[v2] Fri, 15 Nov 2013 18:26:56 UTC (22 KB)
[v3] Sat, 3 May 2014 17:37:18 UTC (24 KB)
[v4] Sat, 12 Jul 2014 17:52:04 UTC (24 KB)
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