Zobrazeno 1 - 10
of 234
pro vyhledávání: '"Žnidarič, Marko"'
Integrability is an exceptional property believed to hold only for systems with fine-tuned parameters. Contrary, we explicitly show that in homogeneous nearest-neighbor qubit circuits with a U(1) symmetry, i.e., circuits that repeatedly apply the sam
Externí odkaz:
http://arxiv.org/abs/2410.06760
Autor:
Znidaric, Marko
We study Ruelle-Pollicott resonances in translationally invariant quantum many-body lattice systems via spectra of momentum-resolved operator propagator on infinite systems. Momentum dependence gives insight into decay of correlation functions, showi
Externí odkaz:
http://arxiv.org/abs/2408.06307
We discuss dynamics obtained by increasing powers of non-normal matrices that are roots of the identity, and therefore have all eigenvalues on the unit circle. Naively, one would expect that the expectation value of such powers cannot grow as one inc
Externí odkaz:
http://arxiv.org/abs/2402.19201
Autor:
Duh, Urban, Znidaric, Marko
Publikováno v:
Phys. Rev. Research 6, 023068 (2024)
We study Floquet systems with translationally invariant nearest-neighbor 2-site gates. Depending on the order in which the gates are applied on an N-site system with periodic boundary conditions, there are factorially many different circuit configura
Externí odkaz:
http://arxiv.org/abs/2401.09708
Autor:
Znidaric, Marko
Publikováno v:
Phys. Rev. B 109, 075105 (2024)
We study a recently discussed XX spin chain with non-local dephasing [arXiv:2310.03069] in a steady-state boundary-driven setting, confirming superdiffusive magnetization transport in the thermodynamic limit. The emergence of superdiffusion is rather
Externí odkaz:
http://arxiv.org/abs/2311.07375
Autor:
Znidaric, Marko
Publikováno v:
Phys. Rev. Research 5, 033145 (2023)
Phantom relaxation is relaxation with a rate that is not given by a finite spectral gap. Studying the average purity dynamics in a staircase random Haar circuit and the spectral decomposition of a non-symmetric matrix describing the underlying Markov
Externí odkaz:
http://arxiv.org/abs/2306.07876
Publikováno v:
Physical Review B 107, 235408 (2023)
We describe dynamics of transverse spin-helix state (SHS) -- a product state with spatially rotating magnetization -- under anisotropic Heisenberg XXZ spin chain evolution. Due to experimental relevance we especially focus on magnetization dynamics.
Externí odkaz:
http://arxiv.org/abs/2303.16632
Autor:
Znidaric, Marko
Publikováno v:
J. Phys. A: Math. Theor. 56, 434001 (2023)
We want to understand how relaxation process from an initial non-generic state proceeds towards a long-time typical state reached under unitary quantum evolution. One would expect that after some initial correlation time relaxation will be a simple e
Externí odkaz:
http://arxiv.org/abs/2301.06395
Autor:
Ghosh, Roopayan, Žnidarič, Marko
The relaxation of observables to their non-equilibrium steady states in a disordered XX chain subjected to dephasing at every site has been intensely studied in recent years. We comprehensively analyze the relaxation of staggered magnetization, i.e.,
Externí odkaz:
http://arxiv.org/abs/2301.05611
Autor:
Bensa, Jaš, Žnidarič, Marko
Publikováno v:
Phys. Rev. A 107, 022604 (2023)
We study purity decay -- a measure of bipartite entanglement -- in a chain of $n$ qubits under the action of various geometries of nearest-neighbor random two-site unitary gates. We use a Markov chain description of average purity evolution, using fu
Externí odkaz:
http://arxiv.org/abs/2211.13565