23 citations · 93 across the 13 of their papers we have counts for
13 papers
Exact spectrum and anomalous relaxation in the open disorder-free Sachdev-Ye-Kitaev system
Soshun Ozaki, Hironobu Yoshida, Hosho Katsura
We study a disorder-free variant of the Sachdev-Ye-Kitaev (SYK) model with dissipation within the Gorini-Kossakowski-Sudarshan-Lindblad formalism. By utilizing the integrability of…
Dissipative free fermions in disguise
Kohei Fukai, Hironobu Yoshida, Hosho Katsura
Recently, a class of spin chains known as ``free fermions in disguise'' (FFD) has been discovered, which possess hidden free-fermion spectra even though they are not solvable via t…
Theory of Steady States for Lindblad Equations beyond Time-Independence: Classification, Uniqueness and Symmetry
Hironobu Yoshida, Ryusuke Hamazaki
We present a rigorous and comprehensive classification of the asymptotic behavior of time-dependent Gorini-Kossakowski-Sudarshan-Lindblad (GKSL) equations under the assumption of H…
Open quantum spin chains with non-reciprocity: a theoretical approach based on the time-dependent generalized Gibbs ensemble
Alice Marché, Hironobu Yoshida, Alberto Nardin +2
We study an open quantum spin chain with non-reciprocal dissipation using a theoretical approach known as time-dependent generalized Gibbs ensemble. In the regime of weak dissipati…
Asymptotically optimal unitary estimation in by the analysis of graph Laplacian
Satoshi Yoshida, Hironobu Yoshida, Mio Murao
Unitary estimation is the task to estimate an unknown unitary operator with queries to the corresponding unitary operation, and its accuracy is evaluated b…
Superconductivity and Low Energy Excitations in an Attractive Hubbard Model
Yukimi Goto, Tohru Koma, Hironobu Yoshida
We study an attractive Hubbard model on bipartite lattices. In the grand canonical formalism,we prove the existence of superconducting long-range order in the ground state on Lieb…
Edge-Edge Correlations without Edge-States: -clustering State as Ground State of the Extended Attractive SU(3) Hubbard Chain
Hironobu Yoshida, Niclas Heinsdorf, Hosho Katsura
We explore the phase diagram of the extended attractive SU() Hubbard chain with two-body hopping and nearest-neighbor attraction at half-filling. In the large on-site attraction…
Universality and two-body losses: lessons from the effective non-Hermitian dynamics of two particles
Alice Marché, Hironobu Yoshida, Alberto Nardin +2
We study the late-time dynamics of two particles confined in one spatial dimension and subject to two-body losses. The dynamics is exactly described by a non-Hermitian Hamiltonian…
Uniqueness of steady states of Gorini-Kossakowski-Sudarshan-Lindblad equations: a simple proof
Hironobu Yoshida
We present a simple proof of a sufficient condition for the uniqueness of non-equilibrium steady states of Gorini-Kossakowski-Sudarshan-Lindblad equations. We demonstrate the appli…
Jordan Decomposition of Non-Hermitian Fermionic Quadratic Forms
Shunta Kitahama, Hironobu Yoshida, Ryo Toyota +1
We give a rigorous proof of Conjecture 3.1 by Prosen [Prosen T 2010 J. Stat. Mech. P07020] on the nilpotent part of the Jordan decomposition of a quadratic fermioni…
Liouvillian gap and single spin-flip dynamics in the dissipative Fermi-Hubbard model
Hironobu Yoshida, Hosho Katsura
Motivated by recent progress in cold-atom experiments, we analyze the SU() Fermi-Hubbard model on a -dimensional hypercubic lattice with two-body loss. By focusing on states…
Exact eigenstates of extended SU() Hubbard models: Generalizations of -pairing states with -particle off-diagonal long-range order
Hironobu Yoshida, Hosho Katsura
We consider -particle generalizations of -pairing states in a chain of -component fermions and show that these states are exact (high-energy) eigenstates of an extended SU…
Rigorous results on the ground state of the attractive SU() Hubbard model
Hironobu Yoshida, Hosho Katsura
We study the attractive SU() Hubbard model with particle-hole symmetry. The model is defined on a bipartite lattice with the number of sites in the subla…