Phase gate and readout with an atom/molecule hybrid platform

Abstract

We suggest a combined atomic/molecular system for quantum computation, which takes advantage of highly developed techniques to control atoms and recent experimental progress in manipulation of ultracold molecules. We show that two atoms of different species in a given site, {\it e.g.}, in an optical lattice, could be used for qubit encoding, initialization and readout, with one atom carrying the qubit, the other enabling a gate. In particular, we describe how a two-qubit phase gate can be realized by transferring a pair of atoms into the ground rovibrational state of a polar molecule with a large dipole moment, and allowing two molecules to interact via their dipole-dipole interaction. We also discuss how the reverse process of coherently transferring a molecule into a pair of atoms could be used as a readout tool for molecular quantum computers.

References in corpus (16)

• A High Phase-Space-Density Gas of Polar Molecules
• A quantum gas microscope - detecting single atoms in a Hubbard regime optical lattice
• Ultracold Molecules in the Ro-Vibrational Triplet Ground State
• Ultracold heteronuclear molecules in a 3D optical lattice
• Schemes for robust quantum computation with polar molecules
• Quantum computing with alkaline earth atoms
• Dynamical Crystallization in the Dipole Blockade of Ultracold Atoms
• Alkaline-Earth-Metal Atoms as Few-Qubit Quantum Registers
• The hyperfine energy levels of alkali metal dimers: ground-state polar molecules in electric and magnetic fields
• Preparation of a quantum state with one molecule at each site of an optical lattice
• Giant formation rates of ultracold molecules via Feshbach Optimized Photoassociation
• Quantum Information Processing in Optical Lattices and Magnetic Microtraps
• Pair-supersolid phase in a bilayer system of dipolar lattice bosons
• Feshbach resonances in an ultracold ${}^7$Li and ${}^{87}$Rb mixture
• Heteronuclear molecules in an optical lattice: Theory and experiment
• Ultracold molecules: vehicles to scalable quantum information processing

Cited by in corpus (8)

• Quantum control of molecular rotation
• Manipulation of Molecules with Electromagnetic Fields
• Quantum computing implementations with neutral particles
• Production of NaCa${}^{+}$ molecular ions in the ground state from cold atom-ion mixtures by photoassociation via an intermediate state
• Long range forces between polar alkali diatoms aligned by external electric fields
• Photoassociation of ultracold long-range polyatomic molecules
• Single- and two-qubit quantum gates using superimposed optical lattice potentials
• Measuring molecular electric dipoles using trapped atomic ions and ultrafast laser pulses