Prospects for measuring the electric dipole moment of the electron using electrically trapped polar molecules.

Prospects for an electron electric-dipole moment search in metastable ThO and ThF+

The observation of an electron electric-dipole moment EEDM would have major ramifications for the standard model of physics. Polar molecules offer a near-ideal laboratory for such searches due to the large effective electric field Feff , on order of tens of GV/cm that can be easily oriented in the laboratory frame. We present an improved method for simply and accurately determining Feff, in a h...

Towards Measuring the Electron Electric Dipole Moment Using Trapped Molecular Ions

Precision spectroscopy of polarized molecules in an ion trap.

Polar molecules are desirable systems for quantum simulations and cold chemistry. Molecular ions are easily trapped, but a bias electric field applied to polarize them tends to accelerate them out of the trap. We present a general solution to this issue by rotating the bias field slowly enough for the molecular polarization axis to follow but rapidly enough for the ions to stay trapped. We demo...

Deflection of neutral polar molecules using inhomogeneous electric fields

The ability to deflect neutral polar molecules present in supersonic molecular beams using inhomogeneous electric fields is a consequence of these molecules possessing a dipole moment. As a dipole moment is inherently a quantum state-dependent feature, it can thus be exploited to allow spatial separation of neutral molecules in different quantum states. In this report, the Stark interaction was...

An Improved ISM Equation of State for Polar Fluids

We developed an equation of state (EOS) by Ihm, Song, and Mason (ISM) for polar fluids. The model consists of four parameters, namely, the second virial coefficient, an effective van der Waals co-volume, a scaling factor, and the reduced dipole moment. The second virial coefficient is calculated from a correlation that uses the heat of vaporization, and the liquid density at the normal boiling ...