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Effective Theory of Nonadiabatic Quantum Evolution Based on the Quantum Geometric Tensor

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [2]
  1. Univ. Clermont Auvergne, Aubière (France). Inst. Pascal. PHOTON-N2; DOE/OSTI
  2. Univ. Clermont Auvergne, Aubière (France). Inst. Pascal. PHOTON-N2
  3. Carnegie Mellon Univ., Pittsburgh, PA (United States). Dept. of Physics
We study the role of the quantum geometric tensor (QGT) in the evolution of two-band quantum systems. We show that all its components play an important role on the extra phase acquired by a spinor and on the trajectory of an accelerated wave packet in any realistic finite-duration experiment. While the adiabatic phase is determined by the Berry curvature (the imaginary part of the tensor), the nonadiabaticity is determined by the quantum metric (the real part of the tensor). We derive, for geodesic trajectories (corresponding to acceleration from zero initial velocity), the semiclassical equations of motion with nonadiabatic corrections. The particular case of a planar microcavity in the strong coupling regime allows us to extract the QGT components by direct light polarization measurements and to check their effects on the quantum evolution.
Research Organization:
Univ. of Washington, Seattle, WA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012509
OSTI ID:
1541337
Alternate ID(s):
OSTI ID: 1459482
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 2 Vol. 121; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (8)

Kähler geometry and Chern insulators: Relations between topology and the quantum metric journal July 2021
Wave packet dynamics of Bogoliubov quasiparticles: quantum metric effects text January 2017
Steady-state Hall response and quantum geometry of driven-dissipative lattices text January 2017
Observation of second order meron polarisation textures in optical microcavities preprint January 2020
Hallmarks of tunneling dynamics with broken reflective symmetry text January 2020
Polariton Anomalous Hall Effect in Transition-Metal Dichalcogenides journal September 2018
Experimental Measurement of the Quantum Metric Tensor and Related Topological Phase Transition with a Superconducting Qubit journal May 2019
Semiclassical wave packet dynamics in nonuniform electric fields journal March 2019

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