Shunji Tsuchiya

Single-particle properties and pseudogap effects in the BCS-BEC crossover regime of an ultracold Fermi gas above Tc

We investigate strong-coupling effects on normal-state properties of an ultracold Fermi gas. Within the framework of

Superfluid-Mott insulator transition of spin-1 bosons in an optical lattice

T

Possibility of a first-order superfluid-mott-insulator transition of spinor bosons in an optical lattice

-matrix approximation in terms of pairing fluctuations, we calculate the single-particle density of states (DOS), as well as the spectral weight, over the entire BCS\char21{}Bose-Einstein condensate (BEC) crossover region above the superfluid phase-transition temperature

Superfluid density of states and pseudogap phenomenon in the BCS-BEC crossover regime of a superfluid Fermi gas

{T}_{\text{c}}

Solitons in two-dimensional Bose-Einstein condensates

. Starting from the weak-coupling BCS regime, we show that the so-called pseudogap develops in DOS above

Pseudogap temperature and effects of a harmonic trap in the BCS-BEC crossover regime of an ultracold Fermi gas

{T}_{\text{c}}

Spin imbalance effect on the Larkin-Ovchinnikov-Fulde-Ferrel state

, which becomes remarkable in the crossover region. The pseudogap structure continuously changes into a fully gapped one in the strong-coupling BEC regime, where the gap energy is directly related to the binding energy of tightly bound molecules. We determine the pseudogap temperature

Photoemission spectrum and effect of inhomogeneous pairing fluctuations in the BCS-BEC crossover regime of an ultracold Fermi gas

{T}^{\ensuremath{\ast}}

Stability of Bose-Einstein condensates in a Kronig-Penney potential

where the dip structure in DOS vanishes. The value of

Fermionic solutions of chiral Gross–Neveu and Bogoliubov–de Gennes systems in nonlinear Schrödinger hierarchy

{T}^{\ensuremath{\ast}}