Subnanometer optical linewidth of thulium atoms in rare-gas crystals

Gaire, Vinod; Raman, Chandra; Parker, Colin

doi:10.1103/physreva.99.022505

Cited by 10 publications

(5 citation statements)

References 36 publications

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“…Cesium atoms in the bcc phase of solid helium (at pressures of ∼ 26 bar and temperatures of ∼ 1.5 K) exhibit good optical pumping and readout of spin states and excellent ensemble spin coherence times, but to date have been limited to low cesium densities ( 10 9 cm −3 ) [18][19][20]. On the other hand, atoms can be trapped in argon and neon matrices at high densities ( 10 17 cm −3 ) [21][22][23], but to date optical pumping and readout of the electron spin state has been significantly less efficient than the best solid state spin systems [24,25].…”

Section: Introductionmentioning

confidence: 99%

Spin coherence and optical properties of alkali-metal atoms in solid parahydrogen

et al. 2019

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We present a joint experimental and theoretical study of spin coherence properties of 39 K, 85 Rb, 87 Rb, and 133 Cs atoms trapped in a solid parahydrogen matrix. We use optical pumping to prepare the spin states of the implanted atoms and circular dichroism to measure their spin states. Optical pumping signals show order-of-magnitude differences depending on both matrix growth conditions and atomic species. We measure the ensemble transverse relaxation times (T * 2 ) of the spin states of the alkali-metal atoms. Different alkali species exhibit dramatically different T * 2 times, ranging from sub-microsecond coherence times for high mF states of 87 Rb, to ∼ 10 2 microseconds for 39 K. These are the longest ensemble T * 2 times reported for an electron spin system at high densities (n 10 16 cm −3 ). To interpret these observations, we develop a theory of inhomogenous broadening of hyperfine transitions of 2 S atoms in weakly-interacting solid matrices. Our calculated ensemble transverse relaxation times agree well with experiment, and suggest ways to longer coherence times in future work. arXiv:1910.05430v1 [physics.atom-ph]

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Section: Introductionmentioning

confidence: 99%

Spin coherence and optical properties of alkali-metal atoms in solid parahydrogen

et al. 2019

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“…. ) in rare gas (Ne, Ar mainly) or parahydrogen matrices were conducted [49,50,[70][71][72][73][74][75][76]. Besides the high sample size and other advantages mentioned above, measurements in solid can also offer a few potential additional benefits: the crystal field (typically on the order of tens of MV cm −1 ) can produce high E eff values, molecules could align themselves along the local crystal axes due to specific trapping site environment [50,69,74].…”

Section: (I) Edm In Solid: Results To Datementioning

confidence: 99%

Experimental perspectives on the matter–antimatter asymmetry puzzle: developments in electron EDM and H¯ experiments

Comparat,

Malbrunot,

Malbrunot-Ettenauer

et al. 2023

Phil. Trans. R. Soc. A.

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In the search for clues to the matter–antimatter puzzle, experiments with atoms or molecules play a particular role. These systems allow measurements with very high precision, as demonstrated by the unprecedented limits down to 10 − 30 e cm on electron EDM using molecular ions, and relative measurements at the level of 10 − 12 in spectroscopy of antihydrogen atoms. Building on these impressive measurements, new experimental directions offer potential for drastic improvements. We review here some of the new perspectives in those fields and their associated prospects for new physics searches. This article is part of the theme issue ‘The particle-gravity frontier’.

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“…A main motivation of this work is to provide some hints for finding different schemes that significantly reduce the linewidth, for example different combinations of guest and matrix atoms or molecules, or different transition schemes. Very small optical linewidths have been recently found for thulium atoms trapped in argon and neon solid matrices [32], but they involve a magnetic-dipole transition, which is not a useful one for our proposed detection scheme. Matrix Isolation Spectroscopy seems to be an appropriate experimental technique for this purpose, because it allows us to efficiently control the interactions between the atoms and the environment, to strongly reduce the mutual interaction between the atoms due to their large separation, as well as suppressing the thermal broadening.…”

Section: Introductionmentioning

confidence: 90%

Spectroscopy of Alkali Atoms in Solid Matrices of Rare Gases: Experimental Results and Theoretical Analysis

et al. 2022

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We present an experimental and theoretical investigation of the spectroscopy of dilute alkali atoms in a solid matrix of inert gases at cryogenic temperatures, specifically Rubidium atoms in a solid Argon or Neon matrix, and related aspects of the interaction energies between the alkali atoms and the atoms of the solid matrix. The system considered is relevant for matrix isolation spectroscopy, and it is at the basis of a recently proposed detector of cosmological axions, exploiting magnetic-type transitions between Zeeman sublevels of alkali atoms in a magnetic field, tuned to the axion mass, assumed in the meV range. Axions are one of the supposed constituents of the dark matter (DM) of the Universe. This kind of spectroscopy could be also relevant for the experimental search of new physics beyond the Standard Model, in particular the search of violations of time-reversal or parity-charge-conjugation (CP) symmetry. In order to efficiently resolve the axion-induced transition in alkali-doped solid matrices, it is necessary to reduce as much as possible the spectral linewidth of the electronic transitions involved. The theoretical investigation presented in this paper aims to estimate the order of magnitude of the inhomogeneous contribution to the linewidth due to the alkali–matrix interactions (Coulomb/exchange and dispersion), and to compare the theoretical results with our experimental measurements of spectra of dilute Rubidium atoms in Argon and Neon solid matrix. The comparison of the expected or measured spectral linewidths will be important for selecting the most appropriate combination of alkali atoms and matrix inert elements to be used in the proposed axion detection scheme. It is finally suggested that dilute Lithium atoms diffused in a cold parahydrogen solid matrix could be, overall, a good system upon which the proposed detector could be based.

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Subnanometer optical linewidth of thulium atoms in rare-gas crystals

Cited by 10 publications

References 36 publications

Spin coherence and optical properties of alkali-metal atoms in solid parahydrogen

Spin coherence and optical properties of alkali-metal atoms in solid parahydrogen

Experimental perspectives on the matter–antimatter asymmetry puzzle: developments in electron EDM and H¯ experiments

Spectroscopy of Alkali Atoms in Solid Matrices of Rare Gases: Experimental Results and Theoretical Analysis

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