A trial-wavefunction calculation predicts anomalous Rabi oscillations and a steady-state magnetization for strongly driven Bose polarons when attractive and repulsive polaron branches coexist.
Ultrafast many-body interferometry of impurities coupled to a Fermi sea
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abstract
The fastest possible collective response of a quantum many-body system is related to its excitations at the highest possible energy. In condensed-matter systems, the corresponding timescale is typically set by the Fermi energy. Taking advantage of fast and precise control of interactions between ultracold atoms, we report on the observation of ultrafast dynamics of impurities coupled to an atomic Fermi sea. Our interferometric measurements track the non-perturbative quantum evolution of a fermionic many-body system, revealing in real time the formation dynamics of quasiparticles and the quantum interference between attractive and repulsive states throughout the full depth of the Fermi sea. Ultrafast time-domain methods to manipulate and investigate strongly interacting quantum gases open up new windows on the dynamics of quantum matter under extreme non-equilibrium conditions.
fields
cond-mat.quant-gas 1years
2025 1verdicts
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Rabi Oscillations of Strongly Driven Bose Polarons
A trial-wavefunction calculation predicts anomalous Rabi oscillations and a steady-state magnetization for strongly driven Bose polarons when attractive and repulsive polaron branches coexist.