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High Energy Physics - Theory

Title: Exact evaluation of large-charge correlation functions in non-relativistic conformal field theory

Abstract: The large-charge master field which generates all n-point correlation functions with an insertion of large charge Q in non-relativistic conformal field theory is obtained. This field is used to compute Schr\"odinger-invariant n-point correlation functions of large-charge operators via a direct evaluation of the path integral. Conformal dimensions are found to agree with calculations based on the state-operator correspondence. The master field solution exhibits an emergent harmonic trap whose frequency is a function of the Euclidean time. The large-charge effective action with operator insertions describes a droplet of superfluid matter whose spatial size scales with the time separation of sources. The solution is used to compute Schr\"odinger symmetry breaking corrections in the large-charge effective field theory (EFT) due to a finite scattering length in the fundamental theory of fermions near unitarity. The scaling of these effects in the large-charge power counting scheme is established, and the size of the effects is quantified using input from quantum Monte Carlo simulations of the near-unitary gas, as well as from the large-N expansion at large charge.
Comments: 30 pages, 5 figures
Subjects: High Energy Physics - Theory (hep-th); Quantum Gases (cond-mat.quant-gas); High Energy Physics - Phenomenology (hep-ph); Nuclear Theory (nucl-th)
Cite as: arXiv:2403.18898 [hep-th]
  (or arXiv:2403.18898v1 [hep-th] for this version)

Submission history

From: Silas Beane [view email]
[v1] Wed, 27 Mar 2024 18:00:02 GMT (1273kb,D)

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