357 citations · 3.3k across the 86 of their papers we have counts for
90 papers
Square-root growth of operator entanglement in an integrable brickwork circuit
Balázs Pozsgay
It is widely expected that the von Neumann entanglement of a local operator grows at most logarithmically in integrable many-body systems in infinite volume. We give a counterexamp…
Exact solutions of hidden free fermion models
Mingchen Zheng, Balázs Pozsgay, Shu Chen
Hidden-free-fermion (HFF) Hamiltonians exhibit free-fermion spectra despite lacking an explicit quadratic representation, yet their algebraic provenance and periodic-boundary behav…
Anomalous current fluctuations in the stochastic XNOR hopping model
Balázs Pozsgay
We consider fluctuations of the spin current in the stochastic XNOR process, a kinetically constrained hopping model in one spatial dimension. We formulate three conjectures with e…
On the growth of operator entanglement in brickwork circuits with Yang--Baxter gates
Balázs Pozsgay
We study the operator entanglement of local operators in one-dimensional brickwork circuits whose two-site gate satisfies the braid relation; throughout this work, we call such a g…
On the two-copy distillability of Werner states and a new partial trace inequality
Thomas C. Fraser, Felix Huber, Balázs Pozsgay +1
Problem 5 in {\it Five Open Problems in Quantum Information Theory} [PRX Quantum 3, 010101 (2022)], asks whether the two-ququart Werner state is two-copy dis…
Free fermions in disguise without exponential degeneracies
Balázs Pozsgay
Recently, a number of spin chain models have been discovered that are solvable via hidden free-fermionic structures, going beyond the Jordan-Wigner paradigm. However, all examples…