Optically-Induced Polarons in Bose-Einstein Condensates: Monitoring Composite Quasiparticle Decay
I. E. Mazets, G. Kurizki, N. Katz, and N. Davidson
TL;DR
This paper predicts the formation of unstable polarons in Bose-Einstein condensates due to nonresonant light scattering, and proposes optical monitoring of their decay to explore quantum decay dynamics and correlations.
Contribution
It introduces the concept of optically-induced polarons in BECs and suggests a method to observe their decay and quantum Zeno effects.
Findings
Unstable polarons can be generated via nonresonant light scattering.
Optical monitoring can reveal deviations from the Golden Rule in decay rates.
The approach probes temporal correlations of elementary excitations in BECs.
Abstract
Nonresonant light-scattering off atomic Bose-Einstein condensates (BECs) is predicted to give rise to hitherto unexplored composite quasiparticles: unstable polarons, i.e., local ``impurities'' dressed by virtual phonons. Optical monitoring of their spontaneous decay can display either Zeno or anti-Zeno deviations from the Golden Rule, and thereby probe the temporal correlations of elementary excitations in BECs.
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