A local impurity in clean free-fermion chains acts as a branching source leading to sustained growth and scrambling via transitions in monitored and unitary models.
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Resonant two-magnon interactions in long-range spin chains yield Efimov three-magnon states for alpha in (2, 2.89) and semi-super Efimov states at alpha=2, confirmed by numerical solution of the Skorniakov-Ter-Martirosian equation.
Derives exact distribution functions for classical and quantum particles in indistinguishable energy states at high degeneracy, leading to non-extensive entropy obeying area law for quantum case and glass transition for classical case.
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Local Impurity Induced Growth and Scrambling in Clean Free Fermions
A local impurity in clean free-fermion chains acts as a branching source leading to sustained growth and scrambling via transitions in monitored and unitary models.
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Universal Bound States in Long-range Spin Chains with an Impurity
Resonant two-magnon interactions in long-range spin chains yield Efimov three-magnon states for alpha in (2, 2.89) and semi-super Efimov states at alpha=2, confirmed by numerical solution of the Skorniakov-Ter-Martirosian equation.
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The Statistical Mechanics of Indistinguishable Energy States and the Glass Transition
Derives exact distribution functions for classical and quantum particles in indistinguishable energy states at high degeneracy, leading to non-extensive entropy obeying area law for quantum case and glass transition for classical case.