Spontaneous symmetry breaking in correlated wave functions

ORAL

Abstract

We show that Jastrow-Slater wave functions, in which a density-density Jastrow factor is applied onto an uncorrelated fermionic state, may possess long-range order even when all symmetries are preserved in the wave function. This fact is mainly related to the presence of a sufficiently strong Jastrow term (also including the case of full Gutzwiller projection, suitable for describing spin models). Selected examples are reported, including the spawning of N\'eel order and dimerization in spin systems, and the stabilization of density and orbital order in itinerant electronic systems. [1] Ryui Kaneko, Luca F. Tocchio, Roser Valent\'i, Federico Becca, and Claudius Gros, arXiv:1510.08653.

Authors

  • Ryui Kaneko

    Goethe-Universitaet Frankfurt

  • Luca F. Tocchio

    Consiglio Nazionale delle Ricerche (CNR) and International School for Advanced Studies (SISSA)

  • Roser Valenti

    Goethe-Universitaet Frankfurt, Institute for Theoretical Physics, University of Frankfurt, Frankfurt a.M., Germany, Institut für Theoretische Physik, Goethe-Universität Frankfurt am Main, Institute of Theoretical Physics, University of Frankfurt

  • Federico Becca

    Consiglio Nazionale delle Ricerche (CNR) and International School for Advanced Studies (SISSA)

  • Claudius Gros

    Institute for Theoretical Physics, Goethe University Frankfurt, Goethe-Universitaet Frankfurt