Efficient Classical Simulation of Optical Quantum Circuits

Details Efficient Classical Simulation of Optical Quantum Circuits Efficient Classical Simulation of Optical Quantum Circuits

2002-04-11

arxiv.org/abs/quant-ph/0204065v2

Phys. Rev. Lett. 89, 207903 (2002)

Physics

Quantum Physics

4 pages, published version

Scientific paper

10.1103/PhysRevLett.89.207903

We identify a broad class of physical processes in an optical quantum circuit that can be efficiently simulated on a classical computer: this class includes unitary transformations, amplification, noise, and measurements. This simulatability result places powerful constraints on the capability to realize exponential quantum speedups as well as on inducing an optical nonlinear transformation via linear optics, photodetection-based measurement and classical feedforward of measurement results, optimal cloning, and a wide range of other processes.

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