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TT: Fachverband Tiefe Temperaturen
TT 71: Many-Body Quantum Dynamics I (joint session DY/TT)
TT 71.6: Talk
Thursday, March 21, 2024, 10:45–11:00, A 151
Non-equilibrium dynamics of bosons with dipole symmetry: Emergence of new symmetry broken steady states — •Md Mursalin Islam1,3, Krishnendu Sengupta2, and Rajdeep Sensarma3 — 1Max Planck Institute for the Physics of Complex Systems, Dresden, Germany — 2Indian Association for the Cultivation of Science, Kolkata, India — 3Tata Institute of Fundamental Research, Mumbai, India
We study equilibrium and dynamical phase diagrams of an interacting system of N-component charged bosons with dipole symmetry. In the large N limit, the equilibrium phase diagram of these bosons shows a first-order transition between two phases. The first one is a localized normal phase where both the global U(N) and the dipole symmetries are conserved and the second one is a delocalized condensed phase where both the symmetries are broken. In contrast, the steady state after an instantaneous quantum quench from the condensed phase shows an additional, delocalized normal phase, where the global U(N) symmetry is conserved but the dipole symmetry is broken, for a range of the quench parameters. A study of the ramp dynamics of the model shows that the above-mentioned steady state exists only above a critical ramp rate.
Keywords: Quantum quench; Non-equilibrium field theory; Bosons with dipole symmetry; Non-equilibrium dynamics; Fracton