Zobrazeno 1 - 10
of 88
pro vyhledávání: '"Vale, C J"'
Autor:
Dyke, P., Musolino, S., Kurkjian, H., Ahmed-Braun, D. J. M., Pennings, A., Herrera, I., Hoinka, S., Kokkelmans, S. J. J. M. F., Colussi, V. E., Vale, C. J.
Symmetry-breaking phase transitions are central to our understanding of states of matter. When a continuous symmetry is spontaneously broken, new excitations appear that are tied to fluctuations of the order parameter. In superconductors and fermioni
Externí odkaz:
http://arxiv.org/abs/2310.03452
Publikováno v:
Phys. Rev. Lett. 127, 100405 (2021)
We present an experimental study of a two component Fermi gas following an interaction quench into the superfluid phase. Starting with a weakly attractive gas in the normal phase, interactions are ramped to unitarity at a range of rates and we measur
Externí odkaz:
http://arxiv.org/abs/2103.07033
Autor:
Kuhn, C. C. N., Hoinka, S., Herrera, I., Dyke, P., Kinnunen, J. J., Bruun, G. M., Vale, C. J.
Publikováno v:
Phys. Rev. Lett. 124, 150401 (2020)
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
Externí odkaz:
http://arxiv.org/abs/1912.03830
Publikováno v:
Phys. Rev. Lett. 122, 203401 (2019)
We present an experimental study of the high-energy excitation spectra of unitary Fermi gases. Using focussed beam Bragg spectroscopy, we locally probe atoms in the central region of a harmonically trapped cloud where the density is nearly uniform, e
Externí odkaz:
http://arxiv.org/abs/1902.07853
Publikováno v:
Phys. Rev. Lett. 121, 120402 (2018)
We present an experimental investigation of collective oscillations in harmonically trapped Fermi gases through the crossover from two to three dimensions. Specifically, we measure the frequency of the radial monopole or breathing mode as a function
Externí odkaz:
http://arxiv.org/abs/1804.05102
Akademický článek
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Publikováno v:
Phys. Rev. Lett. 116, 045302 (2016)
Thermodynamic properties of matter are conveniently expressed as functional relations between variables known as equations of state. Here we experimentally determine the compressibility, density and pressure equations of state for an attractive 2D Fe
Externí odkaz:
http://arxiv.org/abs/1508.04502
Autor:
Dyke, P., Fenech, K., Peppler, T., Lingham, M. G., Hoinka, S., Zhang, W., Mulkerin, B., Hu, H., Liu, X. -J., Vale, C. J.
Publikováno v:
Phys. Rev. A 93, 011603 (2016)
Ultracold Fermi gases subject to tight transverse confinement offer a highly controllable setting to study the two-dimensional (2D) BCS to Berezinskii-Kosterlitz-Thouless superfluid crossover. Achieving the 2D regime requires confining particles to t
Externí odkaz:
http://arxiv.org/abs/1411.4703
Publikováno v:
Phys. Rev. Lett. 112, 100404 (2014)
We present measurements of the local (homogeneous) density-density response function of a Fermi gas at unitarity using spatially resolved Bragg spectroscopy. By analyzing the Bragg response across one axis of the cloud we extract the response functio
Externí odkaz:
http://arxiv.org/abs/1308.5487
Publikováno v:
Phys. Rev. Lett. 109, 050403 (2012)
We present an experimental investigation of the dynamic spin response of a strongly interacting Fermi gas using Bragg spectroscopy. By varying the detuning of the Bragg lasers, we show that it is possible to measure the response in the spin and densi
Externí odkaz:
http://arxiv.org/abs/1203.4657