A quantum-network register assembled with optical tweezers in an optical cavity

Area of Science:

• Quantum Information Science
• Atomic Physics
• Quantum Optics

Background:

• Quantum computation and communication promise capabilities beyond classical physics.
• Scalability of quantum systems with many qubits remains a significant challenge.
• Quantum networks with small registers interfaced to communication qubits offer a potential solution.

Purpose of the Study:

• To report on a novel quantum register design for scalable quantum information processing.
• To demonstrate deterministic assembly of a 2D atomic array using optical techniques.
• To achieve efficient multiplexed atom-photon entanglement.

Main Methods:

• Utilized a combination of optical tweezers and optical lattices to create a 2D atomic array within an optical cavity.
• Employed a single atom-addressing beam to stimulate photon emission from individual atoms.
• Leveraged cavity-mediated quantum logic for entanglement generation.

Main Results:

• Successfully assembled a two-dimensional array of atoms in an optical cavity.
• Demonstrated multiplexed atom-photon entanglement with a generation-to-detection efficiency nearing 90%.
• The developed register is suitable for interfacing computation and communication qubits.

Conclusions:

• The presented quantum register design offers a viable pathway towards scalable quantum networks.
• Efficient atom-photon entanglement is a key enabler for distributed quantum information processing.
• This approach addresses scalability challenges in quantum information science.