LINEAR OPTICAL IMPLEMENTATION OF DISCRETE QUANTUM FOURIER TRANSFORM WITH CONVENTIONAL PHOTON DETECTORS
Hong‐Fu Wang, Shou Zhang, Kyu-Hwang Yeon · International Journal of Quantum Information · 2011
We present a linear optical scheme for implementing two-bit discrete quantum Fourier transform based only on simple linear optical elements, a pair of two-photon polarization entangled states, and the conventional photon detectors that only distinguish between the presence and absence of the photons. The scheme can be implemented with a certain success probability, and the implementation of the scheme in experiment would be an important step towards more complex linear optical quantum computation.