9 papers
Spectral Topology and Universal Krylov Dynamics
Jeff Murugan, Hendrik J. R. Van Zyl, Masataka Watanabe
The leading asymptotic growth of Lanczos coefficients is controlled by spectral tails and furnishes a coarse classification of Krylov dynamics. We show that the \textit{global topo…
Rethinking quantum information in gravity and fields
Kanato Goto, Yuta Hamada, Kohtaro Kato +6
This paper presents a curated selection of research questions at the intersection of quantum gravity and quantum information, chosen to highlight issues that we regard as particula…
Emergent Andreev Reflection from a Lattice Duality Defect
Atsushi Ueda, Tokiro Numasawa, Boris De Vos +1
Andreev reflection converts an incoming fermion into an outgoing hole and is usually tied to a superconducting interface. We show that an analogous charge-conjugating boundary cond…
What happens to wavepackets of fermions when scattered by the Maldacena-Ludwig wall?
Yuji Tachikawa, Keita Tsuji, Masataka Watanabe
We study wavepackets of exotic excitations after two-dimensional fermions are scattered by the boundary condition constructed by Maldacena and Ludwig, which turns elementary excita…
Gauge theory and mixed state criticality
Takamasa Ando, Shinsei Ryu, Masataka Watanabe
In mixed quantum states, the notion of symmetry is divided into two types: strong and weak symmetry. While spontaneous symmetry breaking (SSB) for a weak symmetry is detected by tw…
A JT/KPZ correspondence
Masataka Watanabe
We point out a correspondence between the Jackiw--Teitelboim (JT) gravity and the stationary measure of the Kardar--Parisi--Zhang (KPZ) equation on an interval. By relating the Sch…