136 citations · 1.4k across the 40 of their papers we have counts for
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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…
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…
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.…
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…