Scrambling and recovery of quantum information in inhomogeneous quenches in two-dimensional conformal field theories

K Goto, M Nozaki, S Ryu, K Tamaoka, MT Tan - Physical Review Research, 2024 - APS
We study various quantum quench processes induced by the Möbius/sine-square
deformation of the Hamiltonian in two-dimensional conformal field theories starting from the …

Probing chaos by magic monotones

K Goto, T Nosaka, M Nozaki - Physical Review D, 2022 - APS
There is a property of a quantum state called “magic.” As shown by the Gottesman-Knill
theorem, so-called stabilizer states, which are composed of only Clifford gates, can be …

Spatial deformation of many-body quantum chaotic systems and quantum information scrambling

K Goto, T Guo, T Nosaka, M Nozaki, S Ryu, K Tamaoka - Physical Review B, 2024 - APS
We numerically study the effect of spatial inhomogeneity on quantum information
scrambling, a process of spreading and locally hiding quantum information in quantum …

Holographic quantum scars

D Liska, V Gritsev, W Vleeshouwers, J Minář - SciPost Physics, 2023 - scipost.org
We discuss a construction of quantum many-body scars in the context of holography. We
consider two-dimensional conformal field theories and use their dynamical symmetries …

Entanglement dynamics of the non-unitary holographic channel

K Goto, M Nozaki, K Tamaoka, MT Tan - Journal of High Energy Physics, 2023 - Springer
A bstract We study the dynamical properties of a strongly scrambling quantum circuit
involving a projective measurement on a finite-sized region by studying the operator …

Quantum information scrambling in non-Markovian open quantum system

LP Han, J Zou, H Li, B Shao - Entropy, 2022 - mdpi.com
In this paper, we investigate the dynamics of a spin chain whose two end spins interact with
two independent non-Markovian baths by using the non-Markovian quantum state diffusion …

Ergodicity Breaking and Deviation from Eigenstate Thermalization in Relativistic Quantum Field Theory

M Srdinšek, T Prosen, S Sotiriadis - Physical review letters, 2024 - APS
The validity of the ergodic hypothesis in quantum systems can be rephrased in the form of
the eigenstate thermalization hypothesis (ETH), a set of statistical properties for the matrix …

Local operator entanglement in spin chains

E Mascot, M Nozaki, M Tezuka - SciPost Physics Core, 2023 - scipost.org
Understanding how and whether local perturbations can affect the entire quantum system is
a fundamental step in understanding non-equilibrium phenomena such as thermalization …

Entanglement dynamics in 2d HCFTs on the curved background: the case of q-Möbius Hamiltonian

C Bai, A Miyata, M Nozaki - Journal of High Energy Physics, 2024 - Springer
A bstract We will explore the dynamical property of non-equilibrium phenomena induced by
two-dimensional holographic conformal field theory (2d holographic CFT) Hamiltonian on …

Chaos by magic

K Goto, T Nosaka, M Nozaki - arXiv preprint arXiv:2112.14593, 2021 - arxiv.org
There is a property of a quantum state called magic. It measures how difficult for a classical
computer to simulate the state. In this paper, we study magic of states in the integrable and …