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Considerations for the extension of coherent optical processors into the quantum computing regime

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posted on 2023-06-09, 01:08 authored by Rupert YoungRupert Young, Phil BirchPhil Birch, Chris ChatwinChris Chatwin
Previously we have examined the similarities of the quantum Fourier transform to the classical coherent optical implementation of the Fourier transform (R. Young et al, Proc SPIE Vol 87480, 874806-1, -11). In this paper, we further consider how superposition states can be generated on coherent optical wave fronts, potentially allowing coherent optical processing hardware architectures to be extended into the quantum computing regime. In particular, we propose placing the pixels of a Spatial Light Modulator (SLM) individually in a binary superposition state and illuminating them with a coherent wave front from a conventional (but low intensity) laser source in order to make a so-called ‘interaction free’ measurement. In this way, the quantum object, i.e. the individual pixels of the SLM in their superposition states, and the illuminating wavefront would become entangled. We show that if this were possible, it would allow the extension of coherent processing architectures into the quantum computing regime and we give an example of such a processor configured to recover one of a known set of images encrypted using the well-known coherent optical processing technique of employing a random Fourier plane phase encryption mask which classically requires knowledge of the corresponding phase conjugate key to decrypt the image. A quantum optical computer would allow interrogation of all possible phase masks in parallel and so immediate decryption.

History

Publication status

  • Published

File Version

  • Accepted version

Journal

Proceedings of SPIE

ISSN

0277-786X

Publisher

Society of Photo-optical Instrumentation Engineers (SPIE)

Volume

9845

Page range

1-9

Event name

SPIE Defense + Security 2016

Event location

Baltimore Convention Center Baltimore, MD , United States

Event type

conference

Event date

17th to 21st April 2016

Department affiliated with

  • Engineering and Design Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2016-05-06

First Open Access (FOA) Date

2016-05-06

First Compliant Deposit (FCD) Date

2016-05-06

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