Weak nonlinearities: A new route to optical quantum computation

Details Weak nonlinearities: A new route to optical quantum computation Weak nonlinearities: A new route to optical quantum computation

2005-07-08

arxiv.org/abs/quant-ph/0507084v1

New J. Phys. 7, 137 (2005)

Physics

Quantum Physics

7 Pages, 4 Figures

Scientific paper

10.1088/1367-2630/7/1/137

Quantum information processing (QIP) offers the promise of being able to do things that we cannot do with conventional technology. Here we present a new route for distributed optical QIP, based on generalized quantum non-demolition measurements, providing a unified approach for quantum communication and computing. Interactions between photons are generated using weak non-linearities and intense laser fields--the use of such fields provides for robust distribution of quantum information. Our approach requires only a practical set of resources, and it uses these very efficiently. Thus it promises to be extremely useful for the first quantum technologies, based on scarce resources. Furthermore, in the longer term this approach provides both options and scalability for efficient many-qubit QIP.

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