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Using unitary operations to preserve quantum states in the presence of relaxation

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arxiv quant-ph/0210078 v1 pith:7T3Y2HAK submitted 2002-10-11 quant-ph

Benjamin Recht , Yael Maguire , Seth Lloyd , I.L. Chuang , N.A. Gershenfeld This is my paper · ORCID
classification quant-ph
keywords quantumlossoperationspreserverelaxationstatessystemsunitary
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When a quantum system interacts with an external environment, it undergoes the loss of quantum correlation (decoherence) and the loss of energy (relaxation) and eventually all of the quantum information becomes classical. Here we show a general principle to use unitary operations to establish and preserve particular non-equilibrium states in arbitrary relaxing quantum systems. We elucidate these concepts with examples of state preservation in one-spin and two-spin entangled systems.

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Cited by 1 Pith paper

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  1. Microscopic and phenomenological models of driven systems in structured reservoirs

    quant-ph 2019-08 accept novelty 6.0 of 10

    For a driven qubit in a structured reservoir, the microscopic master equation predicts steady states different from those of the fixed-dissipator model, allowing reservoir-engineered target states.

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