Thermalization induced by quantum scattering
- URL: http://arxiv.org/abs/2012.01062v1
- Date: Wed, 2 Dec 2020 10:04:30 GMT
- Title: Thermalization induced by quantum scattering
- Authors: Samuel L. Jacob, Massimiliano Esposito, Juan M. R. Parrondo, Felipe
Barra
- Abstract summary: We study a fixed quantum system Y subject to collisions with massive particles X described by wave-packets.
We derive the scattering map for system Y and show that the induced evolution crucially depends on the width of the incident wave-packets.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We use quantum scattering theory to study a fixed quantum system Y subject to
collisions with massive particles X described by wave-packets. We derive the
scattering map for system Y and show that the induced evolution crucially
depends on the width of the incident wave-packets compared to the level spacing
in Y . If Y is non-degenerate, sequential collisions with narrow wave-packets
cause Y to decohere. Moreover, an ensemble of narrow packets produced by
thermal effusion causes Y to thermalize. On the other hand, broad wave-packets
can act as a source of coherences for Y , even in the case of an ensemble of
incident wave-packets given by the effusion distribution, preventing
thermalization. We illustrate our findings on several simple examples and
discuss the consequences of our results in realistic experimental situations.
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