9 papers
Multipartite Markov Gaps and Entanglement Wedge Multiway Cuts
Norihiro Iizuka, Akihiro Miyata, Mitsuhiro Nishida
The Markov gap, defined as the difference between reflected entropy and mutual information, serves as a diagnostic for quantum recoverability and multipartite entanglement. In holo…
Why many-partite entanglement is essential for holography
Norihiro Iizuka, Simon Lin, Mitsuhiro Nishida
We argue that many-partite entanglement is ubiquitous in holography and holographic quantum error correction codes. We base our claim on genuine multi-entropy, a new measure for mu…
More on genuine multi-entropy and holography
Norihiro Iizuka, Simon Lin, Mitsuhiro Nishida
By generalizing the construction of genuine multi-entropy for genuine multi-partite entanglement proposed in the previous paper arXiv:2502.07995, we give a p…
Genuine multi-entropy and holography
Norihiro Iizuka, Mitsuhiro Nishida
Is bipartite entanglement sufficient for holography? Through the analysis of the Markov gap, it is known that the answer is no. In this paper, we give a new perspective on this iss…
Black Hole Multi-Entropy Curves
Norihiro Iizuka, Simon Lin, Mitsuhiro Nishida
We investigate the multi-partite entanglement structure of an evaporating black hole and its Hawking radiation by dividing the radiation into finer subsystems. We approximate an ev…
A note on the non-planar corrections for the Page curve in the PSSY model via the IOP matrix model correspondence
Norihiro Iizuka, Mitsuhiro Nishida
We develop a correspondence between the PSSY model and the IOP matrix model by comparing their Schwinger-Dyson equations, Feynman diagrams, and parameters. Applying this correspond…
Logarithmic singularities of Renyi entropy as a sign of chaos?
Norihiro Iizuka, Mitsuhiro Nishida
We propose that the logarithmic singularities of the Renyi entropy of local-operator-excited states for replica index can be a sign of quantum chaos. As concrete examples, we a…
Krylov complexity as an order parameter for deconfinement phase transitions at large
Takanori Anegawa, Norihiro Iizuka, Mitsuhiro Nishida
Krylov complexity has been proposed as a diagnostic of chaos in non-integrable lattice and quantum mechanical systems, and if the system is chaotic, Krylov complexity grows exponen…
Out-of-time-ordered correlators in the IP matrix model
Norihiro Iizuka, Mitsuhiro Nishida
We study the out-of-time-ordered correlators (OTOCs) in the IP matrix model. It was shown in arXiv:1602.06422 that OTOCs do not grow when the adjoint is massless. We generalize the…