Deterministic photonic quantum computation in a synthetic time dimension
Abstract
Photonics offers unique advantages as a substrate for quantum information processing, but imposes fundamental scalability challenges. Nondeterministic schemes impose massive resource overheads, while deterministic schemes require prohibitively many identical quantum emitters to realize sizeable quantum circuits. Here we propose a scalable architecture for a photonic quantum computer that needs minimal quantum resources to implement any quantum circuit: a single coherently controlled atom. Optical switches endow a photonic quantum state with a synthetic time dimension by modulating photon–atom couplings. Quantum operations applied to the atomic qubit can be teleported onto photonic qubits via projective measurement, and arbitrary quantum circuits can be compiled into a sequence of these teleported operators. This design negates the need for many identical quantum emitters to be integrated into a photonic circuit and allows effective all-to-all connectivity between photonic qubits. The proposed device has a machine size that is independent of quantum circuit depth, does not require single-photon detectors, operates deterministically, and is robust to experimental imperfections.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 29, 2021
- Source ID
- 10.1364/optica.424258
Entities
People
- Avik Dutt
- Benjamin Bartlett
- Shanhui Fan
Organizations
- Air Force Office of Scientific Research
- Stanford University
- United States Department of Defense