AI Article Synopsis
- Researchers used interferometric measurements to observe that an optically trapped exciton-polariton condensate exhibits persistent pseudo-spin precession during an optical pulse, with over 100,000 precessions occurring in a single 20 μs pulse.
- This precession is driven by polariton nonlinear interactions, which create a self-induced magnetic field that influences the spin dynamics of the condensate.
- The frequency of the Larmor precession and its trajectory can be manipulated by changing the condensate density with optical methods, highlighting its potential for applications in magnetometry and the development of spin-squeezed polariton condensates.
Article Abstract
Interferometric measurements of an optically trapped exciton-polariton condensate reveal a regime where the condensate pseudo-spin precesses persistently within the driving optical pulse. For a single 20 μs optical pulse, the condensate pseudo-spin undergoes over 10^{5} full precessions with striking frequency stability. The emergence of the precession is traced to polariton nonlinear interactions that give rise to a self-induced out-of-plane magnetic field, which in turn drives the system spin dynamics. The Larmor precession frequency and trajectory are directly influenced by the condensate density, enabling the control of this effect with optical means. Our results accentuate the system's potential for the realization of magnetometry devices and can lead to the emergence of spin-squeezed polariton condensates.
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| http://dx.doi.org/10.1103/PhysRevLett.129.155301 | DOI Listing |
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