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arXiv · 1103.5449

Dissipation-induced pure Gaussian state

Kei Koga·Naoki Yamamoto
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Abstract

This paper provides some necessary and sufficient conditions for a generalMarkovian Gaussian master equation to have a unique pure steady state. The conditions are described by simple matrix equations; thus the so-called environment engineering problem for pure-Gaussian-state preparation can be straightforwardly dealt with in the linear algebraic framework. In fact, based on one of those conditions, for an arbitrary given pure Gaussian state,we obtain a complete parametrization of the Gaussian master equation having that state as a unique steady state; this leads to a systematic procedure for engineering a desired dissipative system.We demonstrate some examples including Gaussian cluster states.

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Kei Koga, Naoki Yamamoto. 2012-02-18. Dissipation-induced pure Gaussian state. https://doi.org/10.1103/physreva.85.022103

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