Norihiro Iizuka

Multipartite Entanglement Can Probe Wormhole Moduli Invisible to Bipartite Entanglement

Takanori Anegawa, Norihiro Iizuka

In a companion paper, we found that near the untwisted point of a four-boundary AdS $_{3}$ wormhole, whenever the complete bipartite Ryu-Takayanagi entropy vector is insensitive to a…

Genuine Multi-Entropy in Abelian Chern--Simons Theory: Exact Key-Ring Collapse and Its Breakdown for Generic Link States

Yen-Cheng Chang, Kaberi Goswami, Norihiro Iizuka +1

We study genuine multi-entropy in Abelian $U (1)_{k}$ Chern-Simons theory. For key-ring link states, where only the linking numbers between one distinguished component $K$ and the rem…

Notes on the Graph-Encoded Manifolds for the (Genuine) Multi-Entropy

Norihiro Iizuka

Genuine multi-entropy is the part of the $q$ -partite multi-entropy that captures entanglement genuinely shared among all $q$ parties, rather than entanglement alr…

Genuine Multi-Entropy in the Toric Code

Sriram Akella, Norihiro Iizuka, Akihiro Miyata

We study genuine multi-entropy as a diagnostic of multipartite entanglement in the toric code, which provides a controlled setting for probing multipartite structures in topologica…

Structural Obstruction to Replica Symmetry Breaking for Multi-Entropy in Random Tensor Networks

Sriram Akella, Norihiro Iizuka

We study replica symmetry breaking (RSB) for multi-entropy in the random-tensor-network (RTN) domain-wall spin model. Our main result is that, within this framework, multi-entropy…

hep-th2025★ 1 cited

Symmetry-resolved genuine multi-entropy: Haar random and graph states

Norihiro Iizuka, Simon Lin

We study the symmetry-resolved genuine multi-entropy, a measure that captures genuine multi-partite entanglement, in Haar random states and random graph states in the presence of a…

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 $GM [q]$ 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…

Dissipation in the $1/ D$ expansion for planar matrix models

Takanori Anegawa, Norihiro Iizuka, Daniel Kabat

We consider the thermal behavior of a large number of matrix degrees of freedom in the planar limit. We work in $0 + 1$ dimensions, with $D$ matrices, and use $1/ D$ as an expansion p…

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 $n$ can be a sign of quantum chaos. As concrete examples, we a…