86 citations · 457 across the 24 of their papers we have counts for
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Lee-Yang cluster expansion approach to the BCS-BEC crossover: BCS and BEC limits
Naoyuki Sakumichi, Yusuke Nishida, Masahito Ueda
It is shown that a cluster expansion technique, which is usually applied in the high-temperature regime to calcutate virial coefficients, can be applied to evaluate the superfluid…
Perron-Frobenius theorem on the superfluid transition of an ultracold Fermi gas
Naoyuki Sakumichi, Norio Kawakami, Masahito Ueda
The Perron-Frobenius theorem is applied to identify the superfluid transition of a two-component Fermi gas with a zero-range s-wave interaction. According to the quantum cluster ex…
Criteria of off-diagonal long-range order in Bose and Fermi systems based on the Lee-Yang cluster expansion method
Naoyuki Sakumichi, Norio Kawakami, Masahito Ueda
The quantum-statistical cluster expansion method of Lee and Yang is extended to investigate off-diagonal long-range order (ODLRO) in one- and multi-component mixtures of bosons or…