7 citations · 23 across the 5 of their papers we have counts for
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cond-mat.quant-gas2016★ 7 cited
Are Quasiparticles and Phonons Identical in Bose--Einstein Condensates?
Kazumasa Tsutsui, Yusuke Kato, Takafumi Kita
We study an interacting spinless Bose-Einstein condensate to clarify theoretically whether the spectra of its quasiparticles (one-particle excitations) and collective modes (two-pa…
cond-mat.stat-mech2016★ 4 cited
Quantum Correlations of Ideal Bose and Fermi Gases in the Canonical Ensemble
Kazumasa Tsutsui, Takafumi Kita
We derive an expression for the reduced density matrices of ideal Bose and Fermi gases in the canonical ensemble, which corresponds to the Bloch--De Dominicis (or Wick's) theorem i…