Fragility of Thermodynamically-Abnormal Ground States of Finite Systems

Details Fragility of Thermodynamically-Abnormal Ground States of Finite Systems Fragility of Thermodynamically-Abnormal Ground States of Finite Systems

2001-09-14

arxiv.org/abs/quant-ph/0109065v1

Physics

Quantum Physics

Scientific paper

We study a general macroscopic quantum system of a finite size, which will exhibit a symmetry breaking if the system size goes to infinity, when the system interacts with an environment. We evaluate the decoherence rates of the anomalously fluctuating vacuum (AFV), which is the symmetric ground state, and the pure phase vacua (PPVs). By making full use of the locality and huge degrees of freedom, we show that there can exist an interaction with an environment which makes the decoherence rate of the AFV anomalously fast, whereas PPVs are less fragile.

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