Single-domain Bose condensate magnetometer achieves energy resolution per bandwidth below h
Cita com:
hdl:2117/369307
Tipus de documentArticle
Data publicació2022-02-08
Condicions d'accésAccés obert
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Abstract
We present a magnetic sensor with energy resolution per bandwidth ER < h. We show how a 87Rb single-domain spinor Bose–
Einstein condensate, detected by nondestructive Faraday rotation
probing, achieves single-shot low-frequency magnetic sensitivity
of 72(8) fT measuring a volume V = 1,091(30) µm3 for 3.5 s, and
thus, ER = 0.075(16). We measure experimentally the condensate volume, spin coherence time, and readout noise and use
phase space methods, backed by three-dimensional mean-field
simulations, to compute the spin noise. Contributions to the spin
noise include one-body and three-body losses and shearing of the
projection noise distribution, due to competition of ferromagnetic
contact interactions and quadratic Zeeman shifts. Nonetheless,
the fully coherent nature of the single-domain, ultracold twobody interactions allows the system to escape the coherence
vs. density trade-off that imposes an energy resolution limit on
traditional spin precession sensors. We predict that other Bosecondensed alkalis, especially the antiferromagnetic 23Na, can further improve the energy resolution of this method.
CitacióCoop, S. [et al.]. Single-domain Bose condensate magnetometer achieves energy resolution per bandwidth below h. "Proceedings of the National Academy of Sciences of the United States of America", 8 Febrer 2022, vol. 119, núm. 6, p. 1-6.
ISSN0027-8424
Versió de l'editorhttps://www.pnas.org/doi/abs/10.1073/pnas.2115339119
Altres identificadorshttps://arxiv.org/abs/2108.11716
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Single_domain_B ... n_per_bandwidth_below_.pdf | 1,628Mb | Visualitza/Obre |