Quantum decoherence reduction by increasing the thermal bath temperature.


The well-known increase of the decoherence rate with the temperature, for a quantum system coupled to a linear thermal bath, no longer holds for a different bath dynamics. This is shown by means of a simple classical nonlinear bath, as well as a quantum spin-boson model. The anomalous effect is due to the temperature dependence of the bath spectral profile. In the case of the second model, a link with the quantum Zeno effect is provided. The decoherence reduction via the temperature increase can be relevant for the design of quantum computers.

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@article{Montina2008QuantumDR, title={Quantum decoherence reduction by increasing the thermal bath temperature.}, author={A. Montina and Fortunato Tito Arecchi}, journal={Physical review letters}, year={2008}, volume={100 12}, pages={120401} }