3 papers
quant-ph2025
Approximation theory for Green's functions via the Lanczos algorithm
Gabriele Pinna, Oliver Lunt, Curt von Keyserlingk
It is known that Green's functions can be expressed as continued fractions; the content at the -th level of the fraction is encoded in a coefficient , which can be recursiv…
quant-ph2025
Subexponential decay of local correlations from diffusion-limited dephasing
Ewan McCulloch, J. Alexander Jacoby, Curt von Keyserlingk +1
Chaotic quantum systems at finite energy density are expected to act as their own heat baths, rapidly dephasing local quantum superpositions. We argue that in fact this dephasing i…
cond-mat.str-el2025
Finite-temperature quantum topological order in three dimensions
Shu-Tong Zhou, Meng Cheng, Tibor Rakovszky +2
We identify a three-dimensional system that exhibits long-range entanglement at sufficiently small but nonzero temperature--it therefore constitutes a quantum topological order at…