192 citations · 1k across the 16 of their papers we have counts for
16 papers
Optimal Thresholds for Fracton Codes and Random Spin Models with Subsystem Symmetry
Hao Song, Janik Schönmeier-Kromer, Ke Liu +3
Fracton models provide examples of novel gapped quantum phases of matter that host intrinsically immobile excitations and therefore lie beyond the conventional notion of topologica…
Band twisting and resilience to disorder in long-range topological superconductors
T. O. Puel, O. Viyuela
Planar topological superconductors with power-law-decaying pairing display different kinds of topological phase transitions where quasiparticles dubbed nonlocal-massive Dirac fermi…
Scalable Fermionic Error Correction in Majorana Surface Codes
Oscar Viyuela, Sagar Vijay, Liang Fu
We study the error correcting properties of Majorana Surface Codes (MSC), topological quantum codes constructed out of interacting Majorana fermions, which can be used to store qua…
Phase diagram of the dissipative quantum Ising model on a square lattice
Jiasen Jin, Alberto Biella, Oscar Viyuela +3
The competition between interactions and dissipative processes in a quantum many-body system can drive phase transitions of different order. Exploiting a combination of cluster met…
Topological Phases in Nodeless Tetragonal Superconductors
Santiago Varona, Laura Ortiz, Oscar Viyuela +1
We compute the topological phase diagram of 2D tetragonal superconductors for the only possible nodeless pairing channels compatible with that crystal symmetry. Subject to a Zeeman…
Dynamical phase transitions at finite temperature from fidelity and interferometric Loschmidt echo induced metrics
Bruno Mera, Chrysoula Vlachou, Nikola Paunković +2
We study finite-temperature Dynamical Quantum Phase Transitions (DQPTs) by means of the fidelity and the interferometric Loschmidt Echo (LE) induced metrics. We analyse the associa…
Localization and oscillations of Majorana fermions in a two-dimensional electron gas coupled with -wave superconductors
Laura Ortiz, Santiago Varona, Oscar Viyuela +1
We study the localization and oscillation properties of the Majorana fermions that arise in a two-dimensional electron gas (2DEG) with spin-orbit coupling (SOC) and a Zeeman field…
Linked cluster expansions for open quantum systems on a lattice
Alberto Biella, Jiasen Jin, Oscar Viyuela +3
We propose a generalization of the linked-cluster expansions to study driven-dissipative quantum lattice models, directly accessing the thermodynamic limit of the system. Our metho…
Chiral Topological Superconductors Enhanced by Long-Range Interactions
Oscar Viyuela, Liang Fu, Miguel Angel Martin-Delgado
We study the phase diagram and edge states of a two-dimensional p-wave superconductor with long-range hopping and pairing amplitudes. New topological phases and quasiparticles diff…
Cluster mean-field approach to the steady-state phase diagram of dissipative spin systems
Jiasen Jin, Alberto Biella, Oscar Viyuela +4
We show that short-range correlations have a dramatic impact on the steady-state phase diagram of quantum driven-dissipative systems. This effect, never observed in equilibrium, fo…
Symmetry-protected Topological Phases at Finite Temperature
O. Viyuela, A. Rivas, M. A. Martin-Delgado
We have applied the recently developed theory of topological Uhlmann numbers to a representative model of a topological insulator in two dimensions, the Qi-Wu-Zhang model. We have…
Two-Dimensional Density-Matrix Topological Fermionic Phases: Topological Uhlmann Numbers
O. Viyuela, A. Rivas, M. A. Martin-Delgado
We construct a topological invariant that classifies density matrices of symmetry-protected topological orders in two-dimensional fermionic systems. As it is constructed out of the…
Uhlmann Phase as a Topological Measure for One-Dimensional Fermion Systems
O. Viyuela, A. Rivas, M. A. Martin-Delgado
We introduce the Uhlmann geometric phase as a tool to characterize symmetry-protected topological phases in 1D fermion systems, such as topological insulators and superconductors.…
Density Matrix Topological Insulators
A. Rivas, O. Viyuela, M. A. Martin-Delgado
Thermal noise can destroy topological insulators (TI). However we demonstrate how TIs can be made stable in dissipative systems. To that aim, we introduce the notion of band Liouvi…
Thermal Instability of Protected End States in a 1-D Topological Insulator
O. Viyuela, A. Rivas, M. A. Martin-Delgado
We have studied the dynamical thermal effects on the protected end states of a topological insula- tor (TI) when it is considered as an open quantum system in interaction with a no…
Generalized Toric Codes Coupled to Thermal Baths
O. Viyuela, A. Rivas, M. A. Martin-Delgado
We have studied the dynamics of a generalized toric code based on qudits at finite temperature by finding the master equation coupling the code's degrees of freedom to a thermal ba…