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Zhou, HJ
Kinked Entropy and Discontinuous Microcanonical Spontaneous Symmetry Breaking
AbstractSpontaneous symmetry breaking (SSB) in statistical physics is a macroscopic collective phenomenon. For the paradigmatic Q-state Potts model it means a transition from the disordered color-symmetric phase to an ordered phase in which one color dominates. Existing mean field theories imply that SSB in the microcanonical statistical ensemble (with energy being the control parameter) should be a continuous process. Here we study microcanonical SSB on the random-graph Potts model and discover that the entropy is a kinked function of energy. This kink leads to a discontinuous phase transition at certain energy density value, characterized by a jump in the density of the dominant color and a jump in the microcanonical temperature. This discontinuous SSB in random graphs is confirmed by microcanonical Monte Carlo simulations, and it is also observed in bond-diluted finite-size lattice systems.
Subject AreaPhysics
MOST Discipline CataloguePhysics, Multidisciplinary
Indexed BySCIE
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhou, HJ. Kinked Entropy and Discontinuous Microcanonical Spontaneous Symmetry Breaking[J]. PHYSICAL REVIEW LETTERS,2019,122(16):160601.
APA Zhou, HJ.(2019).Kinked Entropy and Discontinuous Microcanonical Spontaneous Symmetry Breaking.PHYSICAL REVIEW LETTERS,122(16),160601.
MLA Zhou, HJ."Kinked Entropy and Discontinuous Microcanonical Spontaneous Symmetry Breaking".PHYSICAL REVIEW LETTERS 122.16(2019):160601.
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