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quant-ph2001
Decoherence of anomalously-fluctuating states of finite macroscopic systems
Akira Shimizu, Takayuki Miyadera, Akihisa Ukena
In quantum systems of a macroscopic size V, such as interacting many particles and quantum computers with many qubits, there exist pure states such that fluctuations of some intens…
quant-ph2001
Fragility of Thermodynamically-Abnormal Ground States of Finite Systems
Takayuki Miyadera, Akira Shimizu
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 enviro…