214 citations · 1.6k across the 81 of their papers we have counts for
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gr-qc2023★ 4 cited
Entanglement partners and monogamy in de Sitter universes
Yasusada Nambu, Koji Yamaguchi
We investigate entanglement of local spatial modes defined by a quantum field in a de Sitter universe. The introduced modes show dis-entanglement behavior when the separation betwe…
gr-qc2023★ 7 cited
Analog de Sitter universe in quantum Hall systems with an expanding edge
Yasusada Nambu, Masahiro Hotta
Expanding edges in quantum Hall systems can become a simulator of quantum 1+1 dimensional expanding universes. In these systems, edge exciations are represented as a chiral scalar…