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arXiv · 2011.14846

Quantum adiabatic cycles and their breakdown

Nicolò Defenu
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Abstract

An analytically solvable model for quasi-static transformations across quantum critical points featuring Bosonic quasi-particle excitations is presented. The model proves that adiabaticity breakdown is a general feature of universal slow dynamics in these systems. The existence of an "anti-adiabatic" dynamical phase with vanishing ground state fidelity in the slow drive limit is also proven. The relation of these findings with the Kibble-Zurek mechanism and their consequences on defect formation in many body systems ramped across a quantum phase transition are discussed.

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Nicolò Defenu. 2020-11-30. Quantum adiabatic cycles and their breakdown. https://doi.org/10.1038/s42005-021-00649-6

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