High-frequency sound in a unitary Fermi gas
We present an experimental and theoretical study of the phonon mode in a unitary Fermi
gas. Using two-photon Bragg spectroscopy, we measure excitation spectra at a momentum
of approximately half the Fermi momentum, both above and below the superfluid critical
temperature T c. Below T c, the dominant excitation is the Bogoliubov-Anderson (BA)
phonon mode, driven by gradients in the phase of the superfluid order parameter. The
temperature dependence of the BA phonon is consistent with a theoretical model based on …
gas. Using two-photon Bragg spectroscopy, we measure excitation spectra at a momentum
of approximately half the Fermi momentum, both above and below the superfluid critical
temperature T c. Below T c, the dominant excitation is the Bogoliubov-Anderson (BA)
phonon mode, driven by gradients in the phase of the superfluid order parameter. The
temperature dependence of the BA phonon is consistent with a theoretical model based on …
High Frequency Sound in a Unitary Fermi Gas
We present an experimental and theoretical study of the phonon mode in a unitary Fermi
gas. Using two-photon Bragg spectroscopy, we measure excitation spectra at a momentum
of approximately half the Fermi momentum, both above and below the superfluid critical
temperature T c. Below T c, the dominant excitation is the Bogoliubov-Anderson (BA)
phonon mode, driven by gradients in the phase of the superfluid order parameter. The
temperature dependence of the BA phonon is consistent with a theoretical model based on …
gas. Using two-photon Bragg spectroscopy, we measure excitation spectra at a momentum
of approximately half the Fermi momentum, both above and below the superfluid critical
temperature T c. Below T c, the dominant excitation is the Bogoliubov-Anderson (BA)
phonon mode, driven by gradients in the phase of the superfluid order parameter. The
temperature dependence of the BA phonon is consistent with a theoretical model based on …
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