Entanglement via rotational blockade of MgF molecules in a magic potential

Abstract

Diatomic polar molecules are one of the most promising platforms of quantum computing due to their rich internal states and large electric dipole moments. Here, we propose entangling rotational states of adjacent polar molecules via a strong electric dipole-dipole interaction. The splitting of 1.27 kHz between two entangled states is predicted for MgF molecules in an optical tweezer array. The resolution of the entangled states can be achieved in a magic potential for the molecules where the rotational states have the same trap frequencies. The magic potential can be formed by tuning the angle between the molecules' quantization axis and the linear polarization of trapping light, so-called magic angle. We calculate the magic angle for MgF molecules in a reasonable experimental condition and obtain that the trap frequencies of the two involved states can be matched within a few 10s of Hz. Establishing entanglement between molecules, our results provide a first step towards quantum computing using diatomic polar molecules.

References in corpus (8)

• Magneto-optical trapping of a diatomic molecule
• Radio Frequency Magneto-Optical Trapping of CaF with High Density
• Path Entanglement of Continuous-Variable Quantum Microwaves
• Ultracold polar molecules as qudits
• Observation of Collisions between Two Ultracold Ground-State CaF Molecules
• Anisotropic Polarizability of Ultracold Polar ${}^{40}$K${}^{87}$Rb Molecules
• A robust entangling gate for polar molecules using magnetic and microwave fields
• Sideband cooling of molecules in optical traps

Cited by in corpus (6)

• Rotational Coherence Times of Polar Molecules in Optical Tweezers
• Long-lived entanglement of molecules in magic-wavelength optical tweezers
• Hyperfine resolved optical spectroscopy of the A${}^2\Pi \leftarrow$X${}^2{\Sigma }^{+}$ transition in MgF
• Absorption spectroscopy for laser cooling and high-fidelity detection of barium monofluoride molecules
• Zeeman-Sisyphus Deceleration for Heavy Molecules with Perturbed Excited-State Structure
• Spectroscopy of laser cooling transitions in MgF