The role of Causality in Tunable Fermi Gas Condensates
Jen-Tsung Hsiang, Chi-Yong Lin, Da-Shin Lee, and Ray J. Rivers
TL;DR
This paper introduces a formalism for describing tunable Fermi gas condensates and investigates phonon creation analogous to particle creation in curved spacetime, enhancing understanding of quantum field effects in condensed matter.
Contribution
It develops a new theoretical framework for cold Fermi atom condensates with tunable sound speed and explores their potential to simulate cosmological particle creation.
Findings
Formalism for tunable Fermi gas condensates
Prediction of spontaneous phonon creation in analog curved spacetime
Insights into quantum effects in condensed matter systems
Abstract
We develop a new formalism for the description of the condensates of cold Fermi atoms whose speed of sound can be tuned with the aid of a narrow Feshbach resonance. We use this to look for spontaneous phonon creation that mimics spontaneous particle creation in curved space-time in Friedmann-Robertson-Walker and other model universes.
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