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 2015 · cond-mat.quant-gasShow all

12 papers · 2 filters

cond-mat.quant-gas2015★ 11 cited

Evolution of Cooper pairs with zero-center-of-mass momentum and their first-order correlation function in a two-dimensional ultracold Fermi gas near the observed Berezinskii-Kosterlitz-Thouless transition

Morio Matsumoto, Daisuke Inotani, Yoji Ohashi

We investigate the center-of-mass momentum distribution $n_{Q}$ of Cooper pairs and their first-order correlation function $g_{1} (r)$ in a strongly interacting two-dimens…

cond-mat.quant-gas2015★ 20 cited

Strong-coupling corrections to spin susceptibility in the BCS-BEC crossover regime of a superfluid Fermi gas

H. Tajima, R. Hanai, Y. Ohashi

We theoretically investigate the uniform spin susceptibility $χ$ in the superfluid phase of an ultracold Fermi gas in the BCS (Bardeen-Cooper-Schrieffer)-BEC (Bose-Einstein condens…

cond-mat.quant-gas2015★ 48 cited

Short range inter-vortex interaction and interacting dynamics of half-quantized vortices in two-component Bose-Einstein condensates

Kenichi Kasamatsu, Minoru Eto, Muneto Nitta

We study the interaction and dynamics of two half-quantized vortices in two-component Bose- Einstein condensates. Using the Pade approximation for the vortex core profile, we calcu…

cond-mat.quant-gas2015★ 23 cited

Specific heat and effects of pairing fluctuations in the BCS-BEC crossover regime of an ultracold Fermi gas

Pieter van Wyk, Hiroyuki Tajima, Ryo Hanai +1

We investigate the specific heat at constant volume $C_{V}$ in the BCS (Bardeen-Cooper-Schrieffer)-BEC (Bose-Einstein condensation) crossover regime of an ultracold Fermi gas above t…

cond-mat.quant-gas2015★ 12 cited

Pairing fluctuations and anisotropic pseudogap phenomenon in an ultracold superfluid Fermi gas with plural $p$ -wave superfluid phases

Daisuke Inotani, Yoji Ohashi

We investigate superfluid properties of a one-component Fermi gas with a uniaxially anisotropic $p$ -wave pairing interaction, $U_{x} > U_{y} = U_{z}$ (where $U_{i}$ ( $i = x, y, z)$ is a $p_{i}$ -wave…

cond-mat.quant-gas2015★ 3 cited

Rashbon bound states associated with a spherical spin-orbit coupling in an ultracold Fermi gas with an $s$ -wave interaction

T. Yamaguchi, D. Inotani, Y. Ohashi

We investigate the formation of rashbon bound states and strong-coupling effects in an ultracold Fermi gas with a spherical spin-orbit interaction, $H_{\rm so}=λ{\bf p}\cdot{\bf σ}…

cond-mat.quant-gas2015

Spin susceptibility and effects of inhomogeneous strong pairing fluctuations in a trapped ultracold Fermi gas

Hiroyuki Tajima, Ryo Hanai, Yoji Ohashi

We theoretically investigate magnetic properties of a unitary Fermi gas in a harmonic trap. Including strong pairing fluctuations within the framework of an extended $T$ -matrix app…

cond-mat.quant-gas2015★ 2 cited

Momentum distribution of Cooper-pairs and strong-coupling effects in a two-dimensional Fermi gas near the Berezinskii-Kosterlitz-Thouless transition

M. Matsumoto, D. Inotani, Y. Ohashi

We investigate strong-coupling properties of a two-dimensional ultracold Fermi gas in the normal state. Including pairing fluctuations within the framework of a $T$ -matrix approxim…

cond-mat.quant-gas2015★ 1 cited

Strong Coupling Effects on the Specific Heat of an Ultracold Fermi Gas in the Unitarity Limit

Pieter van Wyk, Hiroyuki Tajima, Ryo Hanai +1

We investigate strong-coupling corrections to the specific heat $C_{V}$ in the normal state of an ultracold Fermi gas in the BCS-BEC crossover region. A recent experiment on a $^{6}$ Li…

cond-mat.quant-gas2015★ 3 cited

Triplet pair amplitude in a trapped $s$ -wave superfluid Fermi gas with broken spin rotation symmetry

Yuki Endo, Daisuke Inotani, Ryo Hanai +1

We investigate the possibility that the broken spatial inversion symmetry by a trap potential induces a spin-triplet Cooper-pair amplitude in an $s$ -wave superfluid Fermi gas. Bein…

cond-mat.quant-gas2015★ 9 cited

Proposed method to realize the $p$ -wave superfluid state using a $s$ -wave superfluid Fermi gas with a synthetic spin-orbit interaction

T. Yamaguchi, Y. Ohashi

We theoretically propose an idea to reach the $p$ -wave superfluid phase in an ultracold Fermi gas. The key of our idea is that the pairing symmetry of a Fermi superfluid is fully d…

cond-mat.quant-gas2015★ 9 cited

Single-particle spectral density of the unitary Fermi gas: Novel approach based on the operator product expansion, sum rules and the maximum entropy method

Philipp Gubler, Naoki Yamamoto, Tetsuo Hatsuda +1

Making use of the operator product expansion, we derive a general class of sum rules for the imaginary part of the single-particle self-energy of the unitary Fermi gas. The sum rul…