Orientation-dependent hyperfine structure of polar molecules in a rare-gas matrix: A scheme for measuring the electron electric dipole moment

  title={Orientation-dependent hyperfine structure of polar molecules in a rare-gas matrix: A scheme for measuring the electron electric dipole moment},
  author={Amar C Vutha and Marko Horbatsch and E A Hessels},
  journal={Physical Review A},
Because molecules can have their orientation locked when embedded into a solid rare-gas matrix, their hyperfine structure is strongly perturbed relative to the freely rotating molecule. The addition of an electric field further perturbs the structure, and fields parallel and antiparallel to the molecular orientation result in different shifts of the hyperfine structure. These shifts enable the selective detection of molecules with different orientations relative to the axes of a rare-gas… 

Figures from this paper

Ultracold mercury–alkali-metal molecules for electron-electric-dipole-moment searches
Heavy polar diatomic molecules are the leading candidates in searches for the permanent electric-dipole moment of the electron (eEDM). Next-generation eEDM search experiments ideally require
Spin coherence and optical properties of alkali-metal atoms in solid parahydrogen
We present a joint experimental and theoretical study of spin coherence properties of 39K, 85Rb, 87Rb, and 133Cs atoms trapped in a solid parahydrogen matrix. We use optical pumping to prepare the
The Role of Relativistic Many-Body Theory in Electron Electric Dipole Moment Searches Using Cold Molecules
In this review article, we survey some of our results pertaining to the search for the electric dipole moment of the electron (eEDM), using heavy polar molecules. In particular, we focus on the
Anisotropic Stark effect of carbon monoxide: emergent orbital cooperativity
ABSTRACT Applying external electric fields to molecules gives rise to spectral shifting and splitting, a phenomenon known as the Stark effect. However, a fundamental question of how electronic
Electric dipole moments of atoms, molecules, nuclei, and particles
A permanent electric dipole moment (EDM) of a particle or system is a separation of charge along its angular momentum axis and is a direct signal of T violation and, assuming CPT symmetry, CP
A new concept for searching for time-reversal symmetry violation using Pa-229 ions trapped in optical crystals
  • J. Singh
  • Physics, Chemistry
    Hyperfine Interactions
  • 2019
Certain pear-shaped nuclei are expected to have enhanced sensitivity to time-reversal and parity-violating interactions originating within the nuclear medium. In particular, Protactinium-229 is
Atoms and molecules in the search for time-reversal symmetry violation
New fundamental particles at the mass scale of a few TeV c–2 could account for observed phenomena that cannot be explained by the standard model (SM) of particle physics, including the microscopic
Buffer-gas cooling, high-resolution spectroscopy, and optical cycling of barium monofluoride molecules
We demonstrate buffer-gas cooling, high-resolution spectroscopy and cycling fluorescence of cold barium monofluoride (BaF) molecules. Our source produces an intense and internally cold molecular beam
Deceleration and Trapping of SrF Molecules.
This work significantly extends the species of neutral molecules of which slow beams can be created for collision studies, precision measurement, and trapping experiments and demonstrates a factor 3 increase in the molecular mass that has been Stark decelerated and trapped.
EFT approach to the electron electric dipole moment at the two-loop level
A bstractThe ACME collaboration has recently reported a new bound on the electric dipole moment (EDM) of the electron, |de| < 1.1 × 10−29 e · cm at 90% confidence level, reaching an unprecedented


Oriented Polar Molecules in a Solid Inert-Gas Matrix: A Proposed Method for Measuring the Electric Dipole Moment of the Electron
We propose a very sensitive method for measuring the electric dipole moment of the electron using polar molecules embedded in a cryogenic solid matrix of inert-gas atoms. The polar molecules can be
Hyperfine structure and electric dipole moment of BaF X 2Σ
Molecular‐beam laser‐microwave double‐resonance spectroscopy was applied to study rotational transitions in the X 2Σ+, v=0 state of BaF at high resolution. From the analysis of the fluorine hyperfine
Molecular Rotation in the Solid State. Theory of Rotation of Trapped Molecules in Rare‐Gas Lattices
A theory is presented to explain the rotational perturbations experienced by a molecule trapped substitutionally in a rare‐gas lattice at low temperatures (4°—20°K). The nonbonded repulsive
Aligning and orienting molecules trapped in octahedral crystal fields (11 pages)
The effect of external fields on directional states of a linear molecule trapped in a crystal field of octahedral symmetry is studied numerically. Adiabatic field-dressed energy levels are obtained
Investigation of PbO as a system for measuring the electric dipole moment of the electron
We point out the potential of the diatomic molecule PbO as a system in which to search for an electron electric dipole moment (EDM). Large oscillator strengths between various electronic states of
The Dipolar Broadening of Magnetic Resonance Lines in Crystals
In regular crystals, the width of the absorption lines arising from the magnetic moment of the electron or nucleus is caused primarily by the interaction between the magnetic dipoles. It is
Rotational spectrum and hyperfine structure of the 2Σ radicals BaF and BaCl
Abstract Microwave rotational spectra have been measured for BaF and BaCl. Precise Dunham coefficients Y ik and spin—rotation parameters γ ik are derived from this first rotational analysis for the
Order of Magnitude Smaller Limit on the Electric Dipole Moment of the Electron
Spin precession measurements in the polar molecule thorium monoxide indicate a nearly spherical charge distribution of an electron, which constrains T-violating physics at the TeV energy scale.
Reconciliation of experimental and theoretical electric tensor polarizabilities of the cesium ground state
We present a new theoretical analysis of the strongly suppressed F- and M-dependent Stark shifts of the Cs ground-state hyperfine structure. Our treatment uses third-order perturbation theory