Zobrazeno 1 - 10
of 147
pro vyhledávání: '"Hoyos, Jose"'
We study the spin transport properties of some disordered spin chains with a special focus on the distribution of the frequency-dependent spin conductivity. In the cases of interest here, the systems are governed by an effectively infinite disorder a
Externí odkaz:
http://arxiv.org/abs/2312.07474
Publikováno v:
Phys. Rev. B 108, 214413 (2023)
We study the effects of quenched disorder in a class of quantum chains with (p+1)-multispin interactions exhibiting a free fermionic spectrum, paying special attention to the case p=2. Depending if disorder couples to (i) all the couplings or just to
Externí odkaz:
http://arxiv.org/abs/2308.16249
Autor:
Xavier, J. C., Hoyos, José A.
Publikováno v:
Phys. Rev. B 108, 214303 (2023)
In this work, we investigate quenches in a free-fermion chain with long-range hopping which decay with the distance with an exponent $\nu$ and has range $D$. By exploring the exact solution of the model, we found that the dynamic free energy is non-a
Externí odkaz:
http://arxiv.org/abs/2308.05182
We investigate the nonequilibrium critical behavior of the contact process with deterministic aperiodic temporal disorder implemented by choosing healing or infection rates according to a family of aperiodic sequences based on the quasiperiodic Fibon
Externí odkaz:
http://arxiv.org/abs/2303.00683
Publikováno v:
Phys. Rev. B 106, L140201 (2022)
We demonstrate that in a class of disordered quantum systems the dynamical partition function is not an analytical function in a time window after certain quantum quenches. We related this behavior to rare and large regions with atypical inhomogeneit
Externí odkaz:
http://arxiv.org/abs/2201.09847
Autor:
Wada, Alexander H. O., Hoyos, José A.
Publikováno v:
Phys. Rev. B 105, 104205 (2022)
Using the recently introduced adaptive density-matrix renormalization-group method, we study the many spin-spin correlations of the spin-$1/2$ antiferromagnetic Heisenberg chain with random coupling constants, namely, the mean value of the bulk and o
Externí odkaz:
http://arxiv.org/abs/2112.10420
Publikováno v:
Phys. Rev. B 104, 174206 (2021)
We present a numerical method for the evaluation of the mass gap, and the low-lying energy gaps, of a large family of free-fermionic and free-parafermionic quantum chains. The method is suitable for some generalizations of the quantum Ising and XY mo
Externí odkaz:
http://arxiv.org/abs/2109.01938
Publikováno v:
Phys. Rev. B 104, 054201 (2021)
We study the effects of bond and site disorder in the classical $J_{1}$-$J_{2}$ Heisenberg model on a square lattice in the order-by-disorder frustrated regime $2J_{2}>\left|J_{1}\right|$. Combining symmetry arguments, numerical energy minimization a
Externí odkaz:
http://arxiv.org/abs/2103.13916
Publikováno v:
Annals of Physics 435, 168526 (2021)
We develop an inhomogeneous quantum mean-field approach to the behavior of collective excitations across the superfluid-Mott glass quantum phase transition in two dimensions, complementing recent quantum Monte Carlo simulations [Phys. Rev. Lett. {\bf
Externí odkaz:
http://arxiv.org/abs/2101.11065
Autor:
Wada, Alexander H. O., Hoyos, José A.
Publikováno v:
Phys. Rev. E 103, 012306 (2021)
In this paper we study the critical properties of the non-equilibrium phase transition of the Susceptible-Exposed-Infected model under the effects of long-range correlated time-varying environmental noise on the Bethe lattice. We show that temporal n
Externí odkaz:
http://arxiv.org/abs/2009.07897