Classification of a Supersolid: Trial Wavefunctions, Symmetry Breakings and Excitation Spectra

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• 作者：Yu Chen (1)
  Jinwu Ye (23) jy306@ccs.msstate.edu
  Guangshan Tian (1)
• 关键词：Ginsburg&#8211 ; Landau theory &#8211 ; Symmetry breakings &#8211 ; Supersolidons &#8211 ; Superfluid density waves &#8211 ; Quantum Monte ; Carlo simulations
• 刊名：Journal of Low Temperature Physics
• 出版年：2012
• 出版时间：November 2012
• 年：2012
• 卷：169
• 期：3-4
• 页码：149-168
• 全文大小：705.2 KB
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• 作者单位：1. Department of Physics, Peking University, Beijing, 100871 China2. Department of Physics and Astronomy, Mississippi State University, P.O. Box 5167, Mississippi State, MS 39762, USA3. Department of Physics, Capital Normal University, Beijing, 100048 China
• ISSN：1573-7357

文摘

A state of matter is characterized by its symmetry breaking and elementary excitations. A supersolid is a state which breaks both translational symmetry and internal U(1) symmetry. Here, we review some past and recent works in phenomenological Ginsburg-Landau theories, ground state trial wavefunctions and microscopic numerical calculations. We also write down a new effective supersolid Hamiltonian on a lattice. The eigenstates of the Hamiltonian contains both the ground state wavefunction and all the excited states (supersolidon) wavefunctions. We contrast various kinds of supersolids in both continuous systems and on lattices, both condensed matter and cold atom systems. We provide additional new insights in studying their order parameters, symmetry breaking patterns, the excitation spectra and detection methods.