214 citations · 1.6k across the 81 of their papers we have counts for
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gr-qc2020★ 3 cited
Null wave front as Ryu-Takayanagi surface
Jun Tsujimura, Yasusada Nambu
The Ryu-Takayanagi formula provides the entanglement entropy of quantum field theory as an area of the minimal surface (Ryu-Takayangi surface) in a corresponding gravity theory. Th…
gr-qc2020★ 6 cited
Squeezing of primordial gravitational waves as quantum discord
Akira Matsumura, Yasusada Nambu
We investigate the squeezing of primordial gravitational waves (PGWs) in terms of quantum discord. We construct a classical state of PGWs without quantum discord and compare it wit…