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quant-ph2025
Breakdown of Fermi's Golden Rule in 1d systems at non-zero temperature
Thomas Young, Jerome LLoyd, Curt von Keyserlingk
In interacting quantum systems, the single-particle Green's function is expected to decay in time due to the interaction induced decoherence of quasiparticles. In the limit of weak…
cond-mat.str-el2025
Enforced Gaplessness from States with Exponentially Decaying Correlations
Rahul Sahay, Curt von Keyserlingk, Ruben Verresen +1
It is well known that an exponentially localized Hamiltonian must be gapless if its ground state has algebraic correlations. We show that even certain exponentially decaying correl…