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Decoherence-free subspaces and subsystems for a collectively depolarizing bosonic channel | | Jonathan L. Ball
; Konrad Banaszek
; | | Date: |
2 Jun 2005 | | Journal: | Open Syst. Inf. Dyn. 12, 121 (2005) DOI: 10.1007/s11080-005-5723-1 | | Subject: | quant-ph | | Abstract: | We discuss the structure of decoherence-free subsystems for a bosonic channel affected by collective depolarization. A single use of the channel is defined as a transmission of a pair of bosonic modes. Collective depolarization consists in a random linear U(2) transformation of the respective mode operators, which is assumed to be identical for $N$ consecutive uses of the channel. We derive a recursion formula that characterizes the dimensionality of available decoherence-free subsystems in such a setting. | | Source: | arXiv, quant-ph/0506020 | | Services: | Forum | Review | PDF | Favorites | |
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