The Experts below are selected from a list of 252 Experts worldwide ranked by ideXlab platform

Kenneth J Roche - One of the best experts on this subject based on the ideXlab platform.

  • cooper pairing above the Critical Temperature in a unitary fermi gas
    Physical Review Letters, 2013
    Co-Authors: Gabriel Wlazlowski, Piotr Magierski, Joaquin E Drut, Aurel Bulgac, Kenneth J Roche
    Abstract:

    We present an ab initio determination of the spin response of the unitary Fermi gas. Based on finite Temperature quantum Monte Carlo calculations and the Kubo linear-response formalism, we determine the Temperature dependence of the spin susceptibility and the spin conductivity. We show that both quantities exhibit suppression above the Critical Temperature of the superfluid-to-normal phase transition due to Cooper pairing. The spin diffusion transport coefficient does not display a minimum in the vicinity of the Critical Temperature and drops to very low values ${D}_{s}\ensuremath{\approx}0.8\ensuremath{\hbar}/m$ in the superfluid phase. All these spin observables show a smooth and monotonic behavior with Temperature when crossing the Critical Temperature ${T}_{c}$, until the Fermi liquid regime is attained at the Temperature ${T}^{*}$, above which the pseudogap regime disappears.

Gabriel Wlazlowski - One of the best experts on this subject based on the ideXlab platform.

  • cooper pairing above the Critical Temperature in a unitary fermi gas
    Physical Review Letters, 2013
    Co-Authors: Gabriel Wlazlowski, Piotr Magierski, Joaquin E Drut, Aurel Bulgac, Kenneth J Roche
    Abstract:

    We present an ab initio determination of the spin response of the unitary Fermi gas. Based on finite Temperature quantum Monte Carlo calculations and the Kubo linear-response formalism, we determine the Temperature dependence of the spin susceptibility and the spin conductivity. We show that both quantities exhibit suppression above the Critical Temperature of the superfluid-to-normal phase transition due to Cooper pairing. The spin diffusion transport coefficient does not display a minimum in the vicinity of the Critical Temperature and drops to very low values ${D}_{s}\ensuremath{\approx}0.8\ensuremath{\hbar}/m$ in the superfluid phase. All these spin observables show a smooth and monotonic behavior with Temperature when crossing the Critical Temperature ${T}_{c}$, until the Fermi liquid regime is attained at the Temperature ${T}^{*}$, above which the pseudogap regime disappears.

Piotr Magierski - One of the best experts on this subject based on the ideXlab platform.

  • cooper pairing above the Critical Temperature in a unitary fermi gas
    Physical Review Letters, 2013
    Co-Authors: Gabriel Wlazlowski, Piotr Magierski, Joaquin E Drut, Aurel Bulgac, Kenneth J Roche
    Abstract:

    We present an ab initio determination of the spin response of the unitary Fermi gas. Based on finite Temperature quantum Monte Carlo calculations and the Kubo linear-response formalism, we determine the Temperature dependence of the spin susceptibility and the spin conductivity. We show that both quantities exhibit suppression above the Critical Temperature of the superfluid-to-normal phase transition due to Cooper pairing. The spin diffusion transport coefficient does not display a minimum in the vicinity of the Critical Temperature and drops to very low values ${D}_{s}\ensuremath{\approx}0.8\ensuremath{\hbar}/m$ in the superfluid phase. All these spin observables show a smooth and monotonic behavior with Temperature when crossing the Critical Temperature ${T}_{c}$, until the Fermi liquid regime is attained at the Temperature ${T}^{*}$, above which the pseudogap regime disappears.

A. Jabarpour - One of the best experts on this subject based on the ideXlab platform.

  • Systematic of Critical Temperature of nuclear pairing transition
    Nuclear Physics A, 2018
    Co-Authors: R. Razavi, A. Rashed Mohassel, A. Rahmatinejad, A. Jabarpour
    Abstract:

    Abstract The Critical Temperature of nuclear pairing transition has been determined for 440 nuclei between 10 Be and 253 Cf within a microscopic model. The shell effect and mass number dependence of the Critical Temperature have been studied. The relation between the pairing gaps of neutrons and protons at zero Temperature, and the Critical Temperature have been investigated. The Critical Temperatures have been compared with the constant Temperatures extracted from the experimental nuclear level densities within a phenomenological model. The comparison shows that our theoretical calculations are consistent with the experimental evidences of pairing transition in nuclei.

R Oppermann - One of the best experts on this subject based on the ideXlab platform.

  • effects of randomness on the Critical Temperature in quasi two dimensional organic superconductors
    Physical Review B, 2012
    Co-Authors: E P Nakhmedov, Oktay Alekperov, R Oppermann
    Abstract:

    The effects of non-magnetic disorder on the Critical Temperature T_c of organic weak-linked layered superconductors with singlet in-plane pairing are considered. A randomness in the interlayer Josephson coupling is shown to destroy phase coherence between the layers and T_c suppresses smoothly in a large extent of the disorder strength. Nevertheless the disorder of arbitrarily high strength can not destroy completely the superconducting phase. The obtained quasi-linear decrease of the Critical Temperature with increasing disorder strength is in good agreement with experimental measurements.