Quantum Monte Carlo Studies of Superfluid Fermi Gases TeX Export

@article{citeulike:4032822, abstract = {We report results of quantum Monte Carlo calculations of the ground state of dilute Fermi gases with attractive short range two-body interactions. The strength of the interaction is varied to study different pairing regimes which are characterized by the product of the s-wave scattering length and the Fermi wave vector, \$ak\_F\$. We report results for the ground state energy, the pairing gap \$\Delta\$ and the quasiparticle spectrum. In the weak coupling regime, \$1/ak\_F \< -1\$, we obtain BCS superfluid and the energy gap \$\Delta\$ is much smaller than the Fermi gas energy \$E\_{FG}\$. When \$ a \> 0\$, the interaction is strong enough to form bound molecules with energy \$E\_{mol}\$. For \$1/ak\_F \gtrsim 0.5\$ we find that weakly interacting composite bosons are formed in the superfluid gas with \$\Delta\$ and gas energy per particle approaching \$|E\_{mol}|/2\$. In this region we seem to have Bose-Einstein condensation (BEC) of molecules. The behavior of the energy and the gap in the BCS to BEC transition region, \$-0.5 \< 1/ak\_F \< 0.5\$ is discussed.}, archivePrefix = {arXiv}, author = {Chang, S. Y. and Carlson, J. and Pandharipande, V. R. and Schmidt, K. E.}, citeulike-article-id = {4032822}, citeulike-linkout-0 = {http://arxiv.org/abs/physics/0404115}, citeulike-linkout-1 = {http://arxiv.org/pdf/physics/0404115}, day = {16}, eprint = {physics/0404115}, keywords = {carlson, qmc, tsai}, month = {Jun}, posted-at = {2009-02-11 07:05:15}, priority = {2}, title = {Quantum Monte Carlo Studies of Superfluid Fermi Gases}, url = {http://arxiv.org/abs/physics/0404115}, year = {2004} }

TY - JOUR ID - citeulike:4032822 L3 - citeulike-article-id:4032822 N2 - We report results of quantum Monte Carlo calculations of the ground state of dilute Fermi gases with attractive short range two-body interactions. The strength of the interaction is varied to study different pairing regimes which are characterized by the product of the s-wave scattering length and the Fermi wave vector, $ak_F$. We report results for the ground state energy, the pairing gap $\Delta$ and the quasiparticle spectrum. In the weak coupling regime, $1/ak_F < -1$, we obtain BCS superfluid and the energy gap $\Delta$ is much smaller than the Fermi gas energy $E_{FG}$. When $ a > 0$, the interaction is strong enough to form bound molecules with energy $E_{mol}$. For $1/ak_F \gtrsim 0.5$ we find that weakly interacting composite bosons are formed in the superfluid gas with $\Delta$ and gas energy per particle approaching $|E_{mol}|/2$. In this region we seem to have Bose-Einstein condensation (BEC) of molecules. The behavior of the energy and the gap in the BCS to BEC transition region, $-0.5 < 1/ak_F < 0.5$ is discussed. TI - Quantum Monte Carlo Studies of Superfluid Fermi Gases KW - carlson KW - qmc KW - tsai AU - Chang, SY AU - Carlson, J AU - Pandharipande, VR AU - Schmidt, KE PY - 2004/Jun/16/ UR - http://arxiv.org/abs/physics/0404115 ER -