Ian A. Walmsley

Detector-Independent Verification of Quantum Light

2017 · Physical Review Letters

We introduce a method for the verification of nonclassical light which is independent of the complex interaction between the generated light and the material of the detectors. This is accomplished by means of a multiplexing …

Heralding quantum entanglement between two room-temperature atomic ensembles

2021 · Optica

Establishing quantum entanglement between individual nodes is crucial for building large-scale quantum networks, enabling secure quantum communications, distributed quantum computing, enhanced quantum metrology, and fundamental tests of quantum mechanics. However, the shared entanglements have been …

The boundary for quantum advantage in Gaussian boson sampling

2022 · Science Advances

Identifying the boundary beyond which quantum machines provide a computational advantage over their classical counterparts is a crucial step in charting their usefulness. Gaussian boson sampling (GBS), in which photons are measured from a highly …