Longitudinal Spin Relaxation of Optically Pumped Rubidium Atoms in Solid Parahydrogen

Upadhyay, Sunil; Kanagin, Andrew N.; Hartzell, Chase; Christy, T. V.; Arnott, W. P.; Momose, Takamasa; Patterson, David; Weinstein, Jonathan D.

doi:10.1103/physrevlett.117.175301

Cited by 18 publications

(7 citation statements)

References 31 publications

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“…No difference in the spectra other than an overall decrease is seen, although the signal-to-noise after bleaching is unfavorable for detailed comparison. Bleaching effects are not uncommon in matrix isolation and have been seen in Rb in noble gases [20,36] and parahydrogen [37].…”

Section: Resultsmentioning

confidence: 99%

Subnanometer optical linewidth of thulium atoms in rare-gas crystals

2019

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We investigate the 1140 nm magnetic dipole transition of thulium atoms trapped in solid argon and neon. These solids can be straightforwardly grown on any substrate at cryogenic temperatures, making them prime targets for surface sensing applications. Our data are well described by a splitting of the single vacuum transition into three components in both argon and neon, with each component narrower than the 0.8 nm spectrometer resolution. The lifetime of the excited states is 14.6(0.5) ms in argon and 27(3) ms in neon, shorter than in vacuum or in solid helium. We also collected visible laser-induced fluorescence spectroscopy showing broader emission features in the range of 580-600 nm. The narrow infrared features in particular suggest a range of possible applications.

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Section: Resultsmentioning

confidence: 99%

Subnanometer optical linewidth of thulium atoms in rare-gas crystals

2019

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“…Recent experiments have shown that atoms trapped in solid hydrogen also retain their key properties for use as quantum sensors for magnetic fields: it is possible to control and measure the spin states of the implanted atoms through optical techniques 3,4 , and the trapped atoms exhibit both long ensemble spin dephasing times (T * 2 ) 4,5 and long spin coherence times (T 2 ) 6 . However, the coherence time T 2 of the electron spin states of the implanted atoms was found to be limited by orthohydrogen impurities in the solid 6 .…”

Section: Introductionmentioning

confidence: 99%

High-purity solid parahydrogen

Bhandari,

Rollings,

Ratto

et al. 2021

Preprint

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Alkali atoms trapped in solid hydrogen matrices have demonstrated ultralong electron spin coherence times, and are promising as quantum sensors. Their spin coherence is limited by magnetic noise from naturally-occurring orthohydrogen molecules in the parahydrogen matrix. In the gas phase, the orthohydrogen component of hydrogen can be converted to parahydrogen by flowing it over a catalyst held at cryogenic temperatures, with lower temperatures giving a lower orthohydrogen fraction. In this work, we use a single cryostat to reduce the orthohydrogen fraction of hydrogen gas and grow a solid matrix from the resulting high-purity parahydrogen. We demonstrate operation of the catalyst down to a temperature of 8 K, and we spectroscopically verify that orthohydrogen impurities in the resulting solid are at a level < 10 −6 . We also find that, at sufficiently low temperatures, the cryogenic catalyst provides isotopic purification, reducing the HD fraction.

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“…For these species, medium effects generally broaden linewidths and shift transition frequencies by several hundred wavenumbers [8]. Despite substantial matrix-induced perturbations to their D-lines, however, alkali atoms have been successfully optically pumped in matrix isolation [5,13]. Furthermore, spin coherence times as long as 0.1 s have been observed for Rb atoms in solid parahydrogen [6].…”

Section: Introductionmentioning

confidence: 99%

High Resolution Spectroscopy of Neutral Yb Atoms in a Solid Ne Matrix

Lambo,

Xu,

Pratt

et al. 2021

Preprint

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We present an experimental and theoretical study of the absorption and emission spectra of Yb atoms in a solid Ne matrix at a resolution of 0.025 nm. Five absorption bands were identified as due to transitions from the 4f 14 5d 0 6s 2 1 S0 ground state configuration to 4f 14 5d 0 6s6p and 4f 13 5d 1 6s 2 configurations. The two lowest energy bands were assigned to outer-shell transitions to 6s6p 3 P1 and 1 P1 atomic states and displayed the structure of a broad doublet and an asymmetric triplet, respectively. The remaining three higher-frequency bands were assigned to inner-shell transitions to distinct J = 1 states arising from the 4f 13 5d 1 6s 2 configuration and were highly structured with narrow linewidths. A classical simulation was performed to identify the stability and symmetry of possible trapping sites in the Ne crystal. It showed that the overarching 1+2 structure of the high frequency bands could be predominantly ascribed to crystal field splitting in the axial field of a 10atom vacancy of C4v symmetry. Their prominent substructures were shown to be manifestations of phonon sidebands associated with the zero-phonon lines on each crystal field state. Unprecedented for a metal-rare gas system, resolution of individual phonon states on an allowed electronic transition was possible under excitation spectroscopy which reflects the semi-quantum nature of solid Ne. In contrast to the absorption spectra, emission spectra produced by steady-state excitation into the 1 P1 absorption band consisted of simple, unstructured fluorescence bands.

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Longitudinal Spin Relaxation of Optically Pumped Rubidium Atoms in Solid Parahydrogen

Cited by 18 publications

References 31 publications

Subnanometer optical linewidth of thulium atoms in rare-gas crystals

Subnanometer optical linewidth of thulium atoms in rare-gas crystals

High-purity solid parahydrogen

High Resolution Spectroscopy of Neutral Yb Atoms in a Solid Ne Matrix

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