556 citations · 3.3k across the 66 of their papers we have counts for
5 papers · 2 filters
Superdensity Operators for Spacetime Quantum Mechanics
Jordan Cotler, Chao-Ming Jian, Xiao-Liang Qi +1
We introduce superdensity operators as a tool for analyzing quantum information in spacetime. Superdensity operators encode spacetime correlation functions in an operator framework…
Rigorous free fermion entanglement renormalization from wavelet theory
Jutho Haegeman, Brian Swingle, Michael Walter +3
We construct entanglement renormalization schemes which provably approximate the ground states of non-interacting fermion nearest-neighbor hopping Hamiltonians on the one-dimension…
Out-of-time-order Operators and the Butterfly Effect
Jordan S. Cotler, Dawei Ding, Geoffrey R. Penington
Out-of-time-order (OTO) operators have recently become popular diagnostics of quantum chaos in many-body systems. The usual way they are introduced is via a quantization of classic…
Temporal Observables and Entangled Histories
Jordan Cotler, Frank Wilczek
We demonstrate that temporal observables, which are sensitive to a system's history (as opposed to its state), implicate entangled histories. We exemplify protocols for measuring s…
Locality from the Spectrum
Jordan S. Cotler, Geoffrey R. Penington, Daniel H. Ranard
Essential to the description of a quantum system are its local degrees of freedom, which enable the interpretation of subsystems and dynamics in the Hilbert space. While a choice o…