Keio University

output

19932026

most citedAn addressable quantum dot qubit with fault-tolerant control fidelity

975 citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions

Showing 2011 · cond-mat.quant-gasShow all

7 papers · 2 filters

cond-mat.quant-gas2011★ 39 cited

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

Shunji Tsuchiya, Ryota Watanabe, Yoji Ohashi

We theoretically investigate excitation properties in the pseudogap regime of a trapped Fermi gas. Using a combined $T$ -matrix theory with the local density approximation, we calcu…

cond-mat.quant-gas2011

Inhomogeneous Pseudogap Phenomenon in the BCS-BEC Crossover Regime of a Trapped Superfluid Fermi Gas

Ryota Watanabe, Shunji Tsuchiya, Yoji Ohashi

We investigate pseudogap phenomena in the unitarity limit of a trapped superfluid Fermi gas. Including effect of strong pairing fluctuations within a $T$ -matrix approximation, as w…

cond-mat.quant-gas2011★ 4 cited

$π$ -junction and spontaneous current state in a superfluid Fermi gas

Takashi Kashimura, Shunji Tsuchiya, Yoji Ohashi

We discuss an idea to realize a spontaneous current in a superfluid Fermi gas. When a polarized Fermi superfluid ($N_\up > N_\dwn$, where $N_{σ}$ is the number of atoms in the hyperf…

cond-mat.quant-gas2011★ 9 cited

Anomalous tunneling of collective excitations and effects of superflow in the polar phase of a spin-1 spinor Bose-Einstein condensate

Shohei Watabe, Yusuke Kato, Yoji Ohashi

We investigate tunneling properties of collective modes in the polar phase of a spin-1 spinor Bose-Einstein condensate. This spinor BEC state has two kinds of gapless modes, i.e.,…

cond-mat.quant-gas2011

Theory of Photoemission-type Experiment in the BCS-BEC Crossover Regime of a Superfluid Fermi Gas

Ryota Watanabe, Shunji Tsuchiya, Yoji Ohashi

We theoretically investigate the recent photoemission-type experiment on $^{40}$ K Fermi gases done by JILA group. Including pairing fluctuations within a strong-coupling $T$ -matrix…

cond-mat.quant-gas2011★ 111 cited

Interaction of half-quantized vortices in two-component Bose-Einstein condensates

Minoru Eto, Kenichi Kasamatsu, Muneto Nitta +2

We study the asymptotic interaction between two half-quantized vortices in two-component Bose-Einstein condensates. When two vortices in different components are placed at distance…

cond-mat.quant-gas2011★ 14 cited

Tunneling properties of Bogoliubov mode and spin wave modes in supercurrent states of a spin-1 ferromagnetic spinor Bose-Einstein condensate