Quantum Dissipative Paraelectricity

• URL: http://arxiv.org/abs/2608.20168v1
• Date: Thu, 20 Aug 2026 15:22:29 GMT
• Title: Quantum Dissipative Paraelectricity
• Abstract summary: We study whether a quantum system with a double-well effective potential undergoes spontaneous symmetry breaking.<n>We introduce a quasi-exactly solvable model to study this problem in the context of ferroelectrics.<n>We identify a regime of emphquantum dissipative paraelectricity, in which observable symmetry breaking is suppressed.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Whether a quantum system with a double-well effective potential undergoes spontaneous symmetry breaking depends not only on the potential landscape but also on the kinetics and the coupling with additional degrees of freedom. Here we introduce a quasi-exactly solvable model to study this problem in the context of ferroelectrics, with results that apply to a broad class of quantum phase transitions. Exploiting the analytical solutions, we provide a strict definition of the quantum paraelectric regime and identify a distinct quantum ferroelectric regime in which symmetry breaking can be realized without tunneling features. We then show that explicit symmetry breaking cannot be inferred from the order-parameter Hamiltonian alone, but requires additional couplings. This leads us to identify a regime of \emph{quantum dissipative paraelectricity}, in which observable symmetry breaking is suppressed during the evolution toward the ground state, even when the double-well structure dominates over zero-point quantum fluctuations.

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