Parametric amplification and noise squeezing in room temperature atomic vapors

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Parametric amplification and noise squeezing in room temperature atomic vapors. / Guarrera, Vera; Gartman, Rafal; Barontini, Giovanni; Bevilacqua, Giuseppe; Chalupczak, Witold.

In: Physical Review Letters, Vol. 123, No. 3, 033601, 17.07.2019.

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Guarrera, Vera ; Gartman, Rafal ; Barontini, Giovanni ; Bevilacqua, Giuseppe ; Chalupczak, Witold. / Parametric amplification and noise squeezing in room temperature atomic vapors. In: Physical Review Letters. 2019 ; Vol. 123, No. 3.

Bibtex

@article{bfd1620ef6d94eef8cba21f54cff6495,
title = "Parametric amplification and noise squeezing in room temperature atomic vapors",
abstract = "We report on the use of parametric excitation to coherently manipulate the collective spin state of an atomic vapor at room temperature. Signatures of the parametric excitation are detected in the ground-state spin evolution. These include the excitation spectrum of the atomic coherences, which contains resonances at frequencies characteristic of the parametric process. The amplitudes of the signal quadratures show amplification and attenuation, and their noise distribution is characterized by a strong asymmetry, similar to those observed in mechanical oscillators. The parametric excitation is produced by periodic modulation of the pumping beam, exploiting a Bell-Bloom-like technique widely used in atomic magnetometry. Notably, we find that the noise squeezing obtained by this technique enhances the signal-to-noise ratio of the measurements up to a factor of 10, and improves the performance of a Bell-Bloom magnetometer by a factor of 3.",
author = "Vera Guarrera and Rafal Gartman and Giovanni Barontini and Giuseppe Bevilacqua and Witold Chalupczak",
year = "2019",
month = jul,
day = "17",
doi = "10.1103/PhysRevLett.123.033601",
language = "English",
volume = "123",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society (APS)",
number = "3",

}

RIS

TY - JOUR

T1 - Parametric amplification and noise squeezing in room temperature atomic vapors

AU - Guarrera, Vera

AU - Gartman, Rafal

AU - Barontini, Giovanni

AU - Bevilacqua, Giuseppe

AU - Chalupczak, Witold

PY - 2019/7/17

Y1 - 2019/7/17

N2 - We report on the use of parametric excitation to coherently manipulate the collective spin state of an atomic vapor at room temperature. Signatures of the parametric excitation are detected in the ground-state spin evolution. These include the excitation spectrum of the atomic coherences, which contains resonances at frequencies characteristic of the parametric process. The amplitudes of the signal quadratures show amplification and attenuation, and their noise distribution is characterized by a strong asymmetry, similar to those observed in mechanical oscillators. The parametric excitation is produced by periodic modulation of the pumping beam, exploiting a Bell-Bloom-like technique widely used in atomic magnetometry. Notably, we find that the noise squeezing obtained by this technique enhances the signal-to-noise ratio of the measurements up to a factor of 10, and improves the performance of a Bell-Bloom magnetometer by a factor of 3.

AB - We report on the use of parametric excitation to coherently manipulate the collective spin state of an atomic vapor at room temperature. Signatures of the parametric excitation are detected in the ground-state spin evolution. These include the excitation spectrum of the atomic coherences, which contains resonances at frequencies characteristic of the parametric process. The amplitudes of the signal quadratures show amplification and attenuation, and their noise distribution is characterized by a strong asymmetry, similar to those observed in mechanical oscillators. The parametric excitation is produced by periodic modulation of the pumping beam, exploiting a Bell-Bloom-like technique widely used in atomic magnetometry. Notably, we find that the noise squeezing obtained by this technique enhances the signal-to-noise ratio of the measurements up to a factor of 10, and improves the performance of a Bell-Bloom magnetometer by a factor of 3.

U2 - 10.1103/PhysRevLett.123.033601

DO - 10.1103/PhysRevLett.123.033601

M3 - Article

C2 - 31386453

VL - 123

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 3

M1 - 033601

ER -