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Defect Formation Preempts Dynamical Symmetry Breaking in Closed Quantum Systems

By Carmine Ortix, Jorrit Rijnbeek and Jeroen van den Brink


We show that no matter how slowly a quantum-to-classical symmetry breaking process is driven, the adiabatic limit can never be reached in a macroscopic body. Massive defect formation preempts an adiabatic quantum-classical crossover and triggers the appearance of a symmetric non-equilibrium state that recursively collapses into the classical state, breaking the symmetry at punctured times. The presence of this state allows the quantum-classical transition to be investigated and controlled in mesoscopic devices by supplying externally the proper dynamical symmetry breaking perturbation.Comment: 4 pages, 4 figure

Topics: Quantum Physics, Condensed Matter - Quantum Gases
Year: 2011
DOI identifier: 10.1103/PhysRevB.84.144423
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