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Nearly Critical Superfluids in Keldysh-Schwinger Formalism

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arxiv 2304.06008 v2 pith:CDRHTNIS submitted 2023-04-12 hep-th

Aristomenis Donos , Polydoros Kailidis This is my paper · ORCID
classification hep-th
keywords theoryeffectivecriticaldynamicsformalismkeldysh-schwingerordersuperfluids
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abstract

We examine the effective theory of critical dynamics near superfluid phase transitions in the framework of the Keldysh-Schwinger formalism. We focus on the sector capturing the dynamics of the complex order parameter and the conserved current corresponding to the broken global symmetry. After constructing the theory up to quadratic order in the $a$-fields, we compare the resulting stochastic system with Model F as well as with holography. We highlight the role of a time independent gauge symmetry of the effective theory also known as ``chemical shift". Finally, we consider the limiting behaviour at energies much lower than the gap of the amplitude mode by integrating out the high energy degrees of freedom to reproduce the effective theory of superfluids.

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Cited by 3 Pith papers

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  1. Schwinger-Keldysh effective field theory of type-B Goldstone: near-diagonal geometry and Berry term

    hep-th 2026-08 conditional novelty 6.0 of 10

    A Schwinger-Keldysh effective field theory for type-B Goldstones is constructed via near-diagonal geometry and a transgression Berry term, with dissipative spectra for the ferromagnet and an SU(2)×U(1) sigma model.

  2. Holographic Schwinger-Keldysh effective field theories including a non-hydrodynamic mode

    hep-th 2024-11 conditional novelty 6.0 of 10

    A holographic derivation of Schwinger-Keldysh effective actions for diffusion with a non-hydrodynamic mode, yielding the Maxwell-Cattaneo action for slow modes and a new frequency-dependent action for IR modes.

  3. Chiral phase transition: effective field theory and holography

    hep-th 2024-12 conditional novelty 5.0 of 10

    A Schwinger-Keldysh effective field theory for the chiral phase transition, with chiral charges and condensate as dynamical variables, is constructed and its coefficients are computed in a modified AdS/QCD model, with...

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