Hybrid quantum computation in quantum optics

Hybrid quantum computation in quantum optics

P. van Loock,* W. J. Munro, Kae Nemoto, T. P. Spiller, T. D. Ladd, Samuel L. Braunstein, and G. J. Milburn National Institute of Informatics, 2-1-2 Hitotsubashi, Chiyoda-ku, Tokyo 101-8430, Japan Optical Quantum Information Theory Group, Institute of Theoretical Physics I and Max-Planck Research Group, Institute of Optics, Information and Photonics, Universität Erlangen-Nürnberg, Staudtstrasse ...

Quantum Computation with Linear Optics

We present a constructive method to translate small quantum circuits into their optical analogues, using linear components of present-day quantum optics technology only. These optical circuits perform precisely the computation that the quantum circuits are designed for, and can thus be used to test the performance of quantum algorithms. The method relies on the representation of several quantum...

Efficient Linear Optics Quantum Computation: Supplementary Information

In the paper we claimed that teleportation with |tn〉 satisfies that if 0 < k < n + 1, then the teleported state appears in mode n + k and only needs to be corrected by applying a phase shift. The modes 2n − l are in state 1 for 0 ≤ l < (n − k) and can be reused in future preparations requiring single photons. The modes 2n − l are in state 0 for n − k < l < n. If k = 0 we learn that the input st...

Quantum Optics

Experimental nonlinear sign shift for linear optics quantum computation.

We have realized the nonlinear sign shift operation for photonic qubits. This operation shifts the phase of two photons reflected by a beam splitter using an extra single photon and measurement. We show that the conditional phase shift is (1.05+/-0.06)pi in clear agreement with theory. Our results show that, by using an ancilla photon and conditional detection, nonlinear optical effects can be ...