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A technology of electromagnetic mode and quantum state, which is applied in quantum computers, nanotechnology for information processing, instruments, etc., and can solve the problems of wasting photons and auxiliary photons

Active Publication Date: 2008-04-16
HEWLETT-PACKARD ENTERPRISE DEV LP
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AI Technical Summary

Problems solved by technology

Although this method is scalable, it would require multiple iterations of individual gate operations until the computation is complete, wasting many entangled and auxiliary photons

Method used

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  • Hewlett packard development co (us)
  • Hewlett packard development co (us)
  • Hewlett packard development co (us)

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Embodiment Construction

[0021] According to one aspect of the present invention, nonlinear optical elements can efficiently perform quantum information processing tasks such as controlled phase shifting, non-destructive state detection, non-destructive Bell state analysis, heralded state preparation, quantum non-destructive Destructive coding and basic quantum gate operations. Direct exploitation of optical nonlinearities can amplify small phase shifts and exploit feed-forward systems in a near-deterministic manner with high operating efficiency.

[0022] Preferred embodiments of the present invention exploit nonlinear effects such as Electromagnetic Induced Transparency (EIT) to produce measurable phase shifts and can be achieved using waveguides and interaction sites such as EIT atoms, which can utilize nanoscale structures to manufacture. For example, R.G.Beausoleil, W.J.Munro and T.P.Spiller's "Coherent Particle Number Conversion in Quantum Information "Applications of CoherentPopulation Transf...

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Abstract

Nonlinear electromagnetic elements can efficiently implement quantum information processing tasks such as controlled phase shifts, non-demolition state detection, quantum subspace projections, non-demolition Bell state analysis, heralded state preparation, quantum non-demolition encoding, and fundamental quantum gate operations. Direct use of electromagnetic non-linearity can amplify small phase shifts and use feed forward systems in a near deterministic manner with high operating efficiency. Measurements using homodyne detectors can cause near deterministic projection of input states on a Hilbert subspace identified by the measurement results. Feed forward operation can then alter the projected state if desired to achieve a desired output state with near 100% efficiency.

Description

Background technique [0001] Quantum information processing generally involves manipulating or using quantum states to store or communicate information or to perform computations. Various systems with quantum states have been proposed or used in quantum information processing. For example, optical systems can manipulate quantum states of light to perform specific quantum information processing tasks. [0002] Quantum computer architectures based on linear optical elements and feed-forward systems with nonlinearities induced by light detection were originally described by E. Knill, R. Laflamme, and G.J. Milburn in "A scheme for efficient quantum computing using linear optical components" ("A Scheme for Efficient Quantum Computation with Linear Optics," Nature 409, 47 (2001)). Although this proposal demonstrates that linear optics quantum computing (LOQC) is possible in principle, scalable systems based on this approach require impractically many quantum resources for reliable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06N1/00G06N99/00
CPCB82Y10/00G06N99/002G06N10/00
Inventor R·G·博索莱尔W·J·蒙罗T·P·斯皮勒S·巴雷特P·科克K·内莫托
Owner HEWLETT-PACKARD ENTERPRISE DEV LP
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