Journal
PHYSICAL REVIEW A
Volume 91, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.91.022317
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Funding
- Australian Research Council Centre of Excellence for Engineered Quantum Systems [CE110001013]
- Air Force Office of Scientific Research
- Army Research Office
- Direct For Mathematical & Physical Scien
- Division Of Physics [1403105] Funding Source: National Science Foundation
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Boson sampling is a simple model for nonuniversal linear optics quantum computing using far fewer physical resources than universal schemes. An input state comprising vacuum and single-photon states is fed through a Haar-random linear optics network and sampled at the output by using coincidence photodetection. This problem is strongly believed to be classically hard to simulate. We show that an analogous procedure implements the same problem, using photon-added or -subtracted squeezed vacuum states (with arbitrary squeezing), where sampling at the output is performed via parity measurements. The equivalence is exact and independent of the squeezing parameter, and hence provides an entire class of quantum states of light in the same complexity class as boson sampling.
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