Methods for preparing entangled quantum states

Details Methods for preparing entangled quantum states Methods for preparing entangled quantum states

2006-01-30

2010-11-16

Holmes, Michael B. (Department: 2129)

Data processing: artificial intelligence

Miscellaneous

Reexamination Certificate

active

07836007

ABSTRACT:
Various embodiments of the present invention are directed to methods for generating an entangled state of qubits. In one embodiment of the present invention, a method for preparing an entangled state of qubits comprises providing a probe and N non-interacting qubits, each qubit comprises a linear superposition of two basis states. The probe is transmitted into an interaction region that separately couples the probe to each of the qubits and produces a number of different probes. A linear superposition of states is output from the interaction region, each state in the linear superposition of states comprises a tensor product of entangled basis states and one of the different probes. The linear superposition of states is projected into one of the entangled states by measuring the state of the probe.

REFERENCES:
Julian Brown, The Quest for the Quantum Computer, Touchstone, 2001, pp. 262-267.
‘Nearly deterministic linear optical controlled—NOT gate’: Nemoto, physical review letters, Dec. 15, 2004, pp. 250502-1 through 250502-4.
‘Quantum non-demolition measurements: a new resource for making linear logic scalable’: Nemoto, Aug. 9, 2004, Hewlett Packard.
‘A high efficiency quantum non-demolition single photon number resolving detector’: Munro, Sep. 9, 2004, pp. 1-4 quantph/0310066v3.

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