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Effective Conservation and Bistability of Atomic Alignment under Strong Spin~Exchange
Abstract
We present a phenomenological model of anomalous alignment signals in dense cesium vapor under linearly polarized pumping and fast spin exchange near zero magnetic field. Despite the absence of a conservation law for rank-2 angular momentum, our recent experiments reveal anisotropic narrow resonances, hysteresis, and bistability. We attribute these effects to a stretched state forming a collective mode in which orientation and alignment are bidirectionally coupled. This mode acts as a reservoir, preserving the essential properties of alignment despite rapid spin exchange.
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BibTeX
@misc{vershovskii2026effective,
title = {{Effective Conservation and Bistability of Atomic Alignment under Strong Spin~Exchange}},
author = {Anton K. Vershovskii},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2609.20741},
eprint = {2609.20741},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.20741},
}
RIS
TY - UNPB
TI - Effective Conservation and Bistability of Atomic Alignment under Strong Spin~Exchange
AU - Anton K. Vershovskii
PY - 2026
DA - 2026/10/07
PB - arXiv
DO - 10.48550/arxiv.2609.20741
UR - https://arxiv.org/abs/2609.20741
AB - We present a phenomenological model of anomalous alignment signals in dense cesium vapor under linearly polarized pumping and fast spin exchange near zero magnetic field. Despite the absence of a conservation law for rank-2 angular momentum, our recent experiments reveal anisotropic narrow resonances, hysteresis, and bistability. We attribute these effects to a stretched state forming a collective mode in which orientation and alignment are bidirectionally coupled. This mode acts as a reservoir, preserving the essential properties of alignment despite rapid spin exchange.
ER -