Entanglement transport and a nanophotonic interface for atoms in optical tweezers

TL;DR

This paper demonstrates a nanophotonic interface enabling entanglement, control, and transport of atomic qubits in optical tweezers, advancing integrated quantum processing capabilities.

Contribution

It introduces a novel method combining nanophotonic cavities with optical tweezers for efficient entanglement and quantum control of atoms.

Findings

Successful entanglement generation between atoms

Fast non-destructive readout achieved

Atomic qubits transported and verified in free space

Abstract

The realization of an efficient quantum optical interface for multi-qubit systems is an outstanding challenge in science and engineering. Using two atoms in individually-controlled optical tweezers coupled to a nanofabricated photonic crystal cavity, we demonstrate entanglement generation, fast non-destructive readout, and full quantum control of atomic qubits. The entangled state is verified in free space after being transported away from the cavity by encoding the qubits into long-lived states and using dynamical decoupling. Our approach bridges quantum operations at an optical link and in free space with a coherent one-way transport, potentially enabling an integrated optical interface for atomic quantum processors.