Search results for "fermi gases"

showing 2 items of 2 documents

Fermionic superfluidity in optical lattices

2008

BCS-theorykylmäfysiikkaatomitisotoopitkaasutsuperfluidityFFLO phasefermi gasesoptical latticessupranesteetfermikaasutsuprajuoksevuussuprajohteet
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Small-amplitude collective modes of a finite-size unitary Fermi gas in deformed traps

2019

We have investigated collective breathing modes of a unitary Fermi gas in deformed harmonic traps. The ground state is studied by the Superfluid Local Density Approximation (SLDA) and small-amplitude collective modes are studied by the iterative Quasiparticle Random Phase Approximation (QRPA). The results illustrate the evolutions of collective modes of a small system in traps from spherical to elongated or pancake deformations. For small spherical systems, the influences of different SLDA parameters are significant, and, in particular, a large pairing strength can shift up the oscillation frequency of collective mode. The transition currents from QRPA show that the compressional flow patte…

EXCITATIONSCondensed Matter::Quantum GasesPhysicsCondensed matter physics010308 nuclear & particles physicsOscillationfermi gasestiheysfunktionaaliteoriaFOS: Physical sciences114 Physical sciences01 natural sciencesultracold gasesSuperfluidityQuantum Gases (cond-mat.quant-gas)random phase approximationPairing0103 physical sciencesQuasiparticleLocal-density approximationCondensed Matter - Quantum Gases010306 general physicsGround stateFermi gasRandom phase approximationdensity functional theoryPhysical Review A
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