Contact and Momentum Distribution of the Unitary Fermi Gas

TY - JOUR

T1 - Contact and Momentum Distribution of the Unitary Fermi Gas

AU - Rossi, Riccardo

AU - Ohgoe, Takahiro

AU - Kozik, Evgeny

AU - Prokof'ev, Nikolay

AU - Svistunov, Boris

AU - Van Houcke, Kris

AU - Werner, Felix

PY - 2018/9/27

Y1 - 2018/9/27

N2 - A key quantity in strongly-interacting resonant Fermi gases is the contact C, which characterizes numerous properties such as the momentum distribution at large momenta or the pair correlation function at short distances. The temperature dependence of C was measured at unitarity, where existing theoretical predictions differ substantially even at the qualitative level. We report accurate data for the contact and the momentum distribution of the unitary gas in the normal phase, obtained by Bold Diagrammatic Monte Carlo and Borel resummation. Our results agree with experimental data within error bars and provide crucial benchmarks for the development of advanced theoretical treatments and precision measurements.

AB - A key quantity in strongly-interacting resonant Fermi gases is the contact C, which characterizes numerous properties such as the momentum distribution at large momenta or the pair correlation function at short distances. The temperature dependence of C was measured at unitarity, where existing theoretical predictions differ substantially even at the qualitative level. We report accurate data for the contact and the momentum distribution of the unitary gas in the normal phase, obtained by Bold Diagrammatic Monte Carlo and Borel resummation. Our results agree with experimental data within error bars and provide crucial benchmarks for the development of advanced theoretical treatments and precision measurements.

UR - https://arxiv.org/abs/1303.6245

U2 - 10.1103/PhysRevLett.121.130406

DO - 10.1103/PhysRevLett.121.130406

M3 - Letter

SN - 0031-9007

VL - 121

JO - Physical Review Letters

JF - Physical Review Letters

M1 - 130406

ER -