A coherent quantum annealer with Rydberg atoms.

Area of Science:

• Quantum Computing
• Atomic Physics
• Quantum Simulation

Background:

• Achieving fully programmable quantum devices with coherent adiabatic dynamics is a key challenge in quantum annealing.
• Current efforts explore various physical platforms to realize quantum annealing.

Purpose of the Study:

• To propose and demonstrate a prototype for a coherent adiabatic quantum computer.
• To leverage Rydberg atoms and the Lechner-Hauke-Zoller (LHZ) architecture for quantum annealing.

Main Methods:

• Combining the quantum simulation toolbox for Rydberg atoms with the LHZ architecture.
• Emulating a spin-1/2 lattice gauge model with quasi-local four-body parity constraints using Rubidium and Caesium atoms.
• Utilizing laser-dressed Rydberg-Rydberg interactions in a bipartite optical lattice.

Main Results:

• Demonstrated a prototype quantum computer capable of all-to-all Ising interactions.
• Rydberg-Rydberg interactions are significantly larger than decoherence rates, ensuring coherent dynamics.
• The proposed system provides a platform for quantum annealing.

Conclusions:

• The integration of Rydberg atoms and the LHZ architecture offers a promising route to coherent adiabatic quantum computing.
• This approach facilitates the exploration of quantum-enhanced optimization protocols using state-of-the-art atomic physics.
• The developed platform supports all-to-all Ising interactions, crucial for quantum annealing.