136 citations · 1.4k across the 40 of their papers we have counts for
40 papers
Stochastic consensus dynamics for decentralized decision systems
André L. M. Vilela, Caio B. L. Silva, Kenric P. Nelson +2
A fundamental mechanism underlying collective phenomena in social, technological, and economic systems is decentralized decision-making, in which the behavior of individual agents…
Decoupling band topology from criticality in bosonic systems
Mariam Ughrelidze, Lorenza Viola, Emilio Cobanera
A new understanding of criticality in systems described by quadratic bosonic Hamiltonians (QBHs) ties the emergence of long-range correlations to boundaries of dynamical, not therm…
Quantum criticality beyond thermodynamic stability
Mariam Ughrelidze, Vincent P. Flynn, Emilio Cobanera +1
For a many-body system in equilibrium, described by a thermodynamically stable Hamiltonian, quantum criticality is associated with structural changes of the many-body ground state.…
Many-body symmetry-protected zero boundary modes of synthetic photo-magnonic crystals
Alan Gardin, Emilio Cobanera, Giuseppe C. Tettamanzi
The topological classification of insulators and superconductors, the "ten-fold way", is grounded on fermionic many-body symmetries and has had a dramatic impact on many fields of…
The Interplay of Finite and Infinite Size Stability in Quadratic Bosonic Lindbladians
Mariam Ughrelidze, Vincent P Flynn, Emilio Cobanera +1
We provide a framework for understanding dynamical metastability in open many-body systems of free bosons, whereby the dynamical stability properties of the system in the infinite-…
Topological zero modes and edge symmetries of metastable Markovian bosonic systems
Vincent P. Flynn, Emilio Cobanera, Lorenza Viola
Tight bosonic analogs of free-fermionic symmetry-protected topological phases, and their associated edge-localized excitations, have long evaded the grasp of condensed-matter and A…
Wiener-Hopf factorization approach to a bulk-boundary correspondence and stability conditions for topological zero-energy modes
Abhijeet Alase, Emilio Cobanera, Gerardo Ortiz +1
Both the physics and applications of fermionic symmetry-protected topological phases rely heavily on a principle known as bulk-boundary correspondence, which predicts the emergence…
Optical Conductivity Signatures of Floquet Electronic Phases
Andrew Cupo, Joshuah T. Heath, Emilio Cobanera +3
Optical conductivity measurements may provide access to distinct signatures of Floquet electronic phases, which are described theoretically by their quasienergy band structures. We…
Floquet Graphene Antidot Lattices
Andrew Cupo, Emilio Cobanera, James D. Whitfield +2
We establish the theoretical foundation of the Floquet graphene antidot lattice, whereby massless Dirac fermions are driven periodically by a circularly polarized electromagnetic f…
Bloch and Bethe ansatze for the Harper model: A butterfly with a boundary
Qiao-Ru Xu, Emilio Cobanera, Gerardo Ortiz
Based on a recent generalization of Bloch's theorem, we present a Bloch ansatz for the Harper model with an arbitrary rational magnetic flux in various geometries, and solve the as…
Topology by Dissipation: Majorana Bosons in Metastable Quadratic Markovian Dynamics
Vincent P. Flynn, Emilio Cobanera, Lorenza Viola
Majorana bosons, that is, tight bosonic analogs of the Majorana fermionic quasiparticles of condensed matter physics, are forbidden for gapped free bosonic matter within a standard…
Squaring the fermion: The threefold way and the fate of zero modes
Qiao-Ru Xu, Vincent P. Flynn, Abhijeet Alase +3
We investigate topological properties and classification of mean-field theories of stable bosonic systems. Of the three standard classifying symmetries, only time-reversal represen…
Restoring number conservation in quadratic bosonic Hamiltonians with dualities
Vincent P. Flynn, Emilio Cobanera, Lorenza Viola
Number-non-conserving terms in quadratic bosonic Hamiltonians can induce unwanted dynamical instabilities. By exploiting the pseudo-Hermitian structure built in to these Hamiltonia…
Deconstructing effective non-Hermitian dynamics in quadratic bosonic Hamiltonians
Vincent P. Flynn, Emilio Cobanera, Lorenza Viola
Unlike their fermionic counterparts, the dynamics of Hermitian quadratic bosonic Hamiltonians are governed by a generally non-Hermitian Bogoliubov-de Gennes effective Hamiltonian.…
Phase transitions in the and U(1) clock models
G. Sun, T. Vekua, E. Cobanera +1
Quantum phase transitions are studied in the non-chiral -clock chain, and a new explicitly U(1)-symmetric clock model, by monitoring the ground-state fidelity susceptibility. Fo…
Absence of Finite Temperature Phase Transitions in the X-Cube Model and its Generalization
Zack Weinstein, Emilio Cobanera, Gerardo Ortiz +1
We investigate thermal properties of the X-Cube model and its `clock-type' (X-Cube) extension. In the latter, the elementary spin-1/2 operators of the X-Cube mo…
Generalization of Bloch's theorem for arbitrary boundary conditions: Interfaces and topological surface band structure
Emilio Cobanera, Abhijeet Alase, Gerardo Ortiz +1
We describe a method for exactly diagonalizing clean -dimensional lattice systems of independent fermions subject to arbitrary boundary conditions in one direction, as well as s…
A generalization of Bloch's theorem for arbitrary boundary conditions: Theory
Abhijeet Alase, Emilio Cobanera, Gerardo Ortiz +1
We present a generalization of Bloch's theorem to finite-range lattice systems of independent fermions, in which translation symmetry is broken only by arbitrary boundary condition…
Exact solution of corner-modified banded block-Toeplitz eigensystems
Emilio Cobanera, Abhijeet Alase, Gerardo Ortiz +1
Motivated by the challenge of seeking a rigorous foundation for the bulk-boundary correspondence for free fermions, we introduce an algorithm for determining exactly the spectrum a…
Quantum Brownian motion in a Landau level
Emilio Cobanera, Peter Kristel, Cristiane Morais Smith
Motivated by questions about the open-system dynamics of topological quantum matter, we investigated the quantum Brownian motion of an electron in a homogeneous magnetic field. Whe…
What is a particle-conserving Topological Superfluid?
Gerardo Ortiz, Emilio Cobanera
We establish a criterion for characterizing superfluidity in interacting, particle-number conserving systems of fermions as topologically trivial or non-trivial. Because our criter…
Exact Solution of Quadratic Fermionic Hamiltonians for Arbitrary Boundary Conditions
Abhijeet Alase, Emilio Cobanera, Gerardo Ortiz +1
We present a procedure for exactly diagonalizing finite-range quadratic fermionic Hamiltonians with arbitrary boundary conditions in one of D dimensions, and periodic in the remain…
Thermodynamic signatures of edge states in topological insulators
Anton Quelle, Emilio Cobanera, Cristiane Morais Smith
Topological insulators are states of matter distinguished by the presence of symmetry protected metallic boundary states. These edge modes have been characterised in terms of trans…
Changing anyonic ground degeneracy with engineered gauge fields
Emilio Cobanera, Jascha Ulrich, Fabian Hassler
For systems of lattice anyons like Majorana and parafermions, the unconventional quantum statistics determines a set of global symmetries (e.g., fermion parity for Majoranas) admit…