Strongly coupled quantum phonon fluid in a solvable model
Evyatar Tulipman, Erez Berg
Abstract
This work studies a solvable model of strongly coupled phonons that can be viewed as a bosonic variant of the Sachdev-Ye-Kitaev model. In addition to the high-temperature classical and low-temperature semiclassical regimes, the authors show that the model have an intermediate-temperature `Planckian' regime where the quasiparticle picture fails as the phonon lifetime is of the order of the Planckian time scale.
Topics & Concepts
PhononSemiclassical physicsPhysicsPhase diagramCrossoverQuantumPhase (matter)Limit (mathematics)Condensed matter physicsParameter spacePhase spaceFunction (biology)Space (punctuation)Quantum mechanicsStatistical physicsMathematicsStatisticsComputer scienceLinguisticsArtificial intelligenceMathematical analysisPhilosophyBiologyEvolutionary biologyPhysics of Superconductivity and MagnetismTheoretical and Computational PhysicsHigh-Energy Particle Collisions Research