Rydberg atom mediated polar molecule interactions: a tool for molecular-state conditional quantum gates and individual addressability

TL;DR

This paper explores how Rydberg atoms can mediate interactions with polar molecules to enable quantum gates and control, significantly enhancing interaction strength and allowing precise molecular state manipulation.

Contribution

It introduces a novel method for using Rydberg atom-mediated interactions to perform quantum gates and control molecular states with enhanced strength and selectivity.

Findings

Interaction strength can be increased up to 10^3 times.

Molecular state-dependent shifts enable individual addressing.

Coherent control and non-destructive readout of molecular qubits are feasible.

Abstract

We study the possibility to use interaction between a polar molecule in the ground electronic and vibrational state and a Rydberg atom to construct two-qubit gates between molecular qubits and to coherently control molecular states. A polar molecule within the electron orbit in a Rydberg atom can either shift the Rydberg state, or form Rydberg molecule. Both the atomic shift and the Rydberg molecule states depend on the initial internal state of the polar molecule, resulting in molecular state dependent van der Waals or dipole-dipole interaction between Rydberg atoms. Rydberg atoms mediated interaction between polar molecules can be enhanced up to $10^{3}$ times. We describe how the coupling between a polar molecule and a Rydberg atom can be applied to coherent control of molecular states, specifically, to individual addressing of molecules in an optical lattice and non-destructive readout of molecular qubits.