Analog and Digital Quantum Computing with Neutral Atoms
summary
Neutral-atom processors use Rydberg blockade with optically trapped atoms to implement both analog simulators and digital gates; experiments at Harvard and QuEra prepare dimer coverings and measure a string-order correlator showing a coherent, metastable quantum spin liquid rather than just a classical mixture. A toric-code prototype is built by moving atoms and measuring stabilizers with 16 data + 8 ancilla qubits. For combinatorial optimization they run MIS on unit-disk graphs with a closed-loop pulse optimizer and report near-quadratic speedup in the deep regime for problem depth×size > 2,000 and offer Aquila cloud access.
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chapters (10)
- 0:00Intro
- 0:50Frontiers in quantum science and engineering
- 2:47Programmable configurations
- 3:23Neutral atom qubits and interactions
- 5:56Topological quantum phases
- 6:34Quantum spin liquid and dimer models
- 8:24Probing topological correlations
- 16:26Hybrid variational optimization
- 21:33Simulated annealing hardness
- 22:52Reconfigurable connectivity
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