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Article overview
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Stabilizing qubit coherence via tracking-control | | Daniel A. Lidar
; Sara Schneider
; | | Date: |
6 Oct 2004 | | Journal: | Quant. Info. and Computation 5, 350 (2005) | | Subject: | quant-ph | | Affiliation: | Center for Quantum Information and Quantum Control, University of Toronto | | Abstract: | We consider the problem of stabilizing the coherence of a single qubit subject to Markovian decoherence, via the application of a control Hamiltonian, without any additional resources. In this case neither quantum error correction/avoidance, nor dynamical decoupling applies. We show that using tracking-control, i.e., the conditioning of the control field on the state of the qubit, it is possible to maintain coherence for finite time durations, until the control field diverges. | | Source: | arXiv, quant-ph/0410048 | | Services: | Forum | Review | PDF | Favorites | |
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