4 papers
Eigenstate entanglement entropy in Bose-Hubbard models
G. Medoš, L. Vidmar
While the eigenstate entanglement entropy has been extensively studied for fermionic systems, much less is known about bosonic systems. Here, we study the entanglement entropy of m…
False signatures of non-ergodic behavior in disordered quantum many-body systems
Adith Sai Aramthottil, Ali Emami Kopaei, Piotr Sierant +2
Ergodic isolated quantum many-body systems satisfy the eigenstate thermalization hypothesis (ETH), i.e., the expectation values of local observables in the system's eigenstates app…
Exact spectral form factors of non-interacting fermions with Dyson statistics
Tatsuhiko N. Ikeda, Lev Vidmar, Michael O. Flynn
The spectral form factor (SFF) is a powerful diagnostic of random matrix behavior in quantum many-body systems. We introduce a family of random circuit ensembles whose SFFs can be…
Single-Particle Universality of the Many-Body Spectral Form Factor
Michael O. Flynn, Lev Vidmar, Tatsuhiko N. Ikeda
We consider systems of fermions evolved by non-interacting unitary circuits with correlated on-site potentials. When these potentials are drawn from the eigenvalue distribution of…