Integrated Optical C-NOT Gates: Estimation of the Main Parameters for Practical Design

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Abstract

The influence of deviation of the beam splitter parameters on the operation of a quantum photon gate in an integrated optical version is considered. It is shown that the required accuracy is quite achievable for electro-optical control in the X-splitter geometry. The estimated length of the device demonstrates its possible implementation even on the substrates with a length of 3 inches.

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About the authors

V. M. Petrov

Saint-Petersburg State University

Author for correspondence.
Email: photonics@technosphera.ru
ORCID iD: 0000-0002-8523-0336

Doctor of Physical and Mathematical Sciences (Radiophysics), D.F.-M.S. (Optics), Professor, Department of General Physics

Russian Federation, Saint-Petersburg

D. A. Koroteev

National Research University ITMO

Email: photonics@technosphera.ru
ORCID iD: 0000-0002-5489-4017

Student, Department of Photonics

Russian Federation, Saint-Petersburg

D. A. Semisalov

National Research University ITMO

Email: photonics@technosphera.ru
ORCID iD: 0000-0003-1757-6519

Student, Department of Photonics

Russian Federation, Saint-Petersburg

V. S. Strashilin

National Research University ITMO

Email: photonics@technosphera.ru
ORCID iD: 0000-0002-0655-0199

Student, Department of Photonics

Russian Federation, Saint-Petersburg

D. S. Khlusevich

National Research University ITMO

Email: photonics@technosphera.ru
ORCID iD: 0000-0002-8298-9451

Student, Department of Photonics

Russian Federation, Saint-Petersburg

M. I. Yakovlev

National Research University ITMO

Email: photonics@technosphera.ru

Student, Institute of Laser Technologies

Russian Federation, Saint-Petersburg

M. V. Parfenov

A. F. Ioffe Physical and Technical Institute

Email: photonics@technosphera.ru
ORCID iD: 0000-0003-3867-9007

Junior Researcher, Department of Quantum Electronics

Russian Federation, Saint-Petersburg

References

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Supplementary files

Supplementary Files
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2. Fig. 1. C-NOT gate circuit in an integrated optical design (not on a scale): Ain-Fin – input waveguides, Aout-Fout – output waveguides, BS1–BS5 – the beam splitters made in the form of integrated optical X-couplers. The beam splitters BS1, BS5 have a count-down ratio of 1 / 2, the beam splitters BS2–BS4 have a count-down ratio of 1 / 3 (the letter π indicates the availability of a phase shift in this channel; blue color shows the electrodes that allow fine count-down ratio adjustment; δL is the length of the linear waveguide section; ΔХ is the length of the rounded waveguide section; ΔL is the length of the beam splitter section))

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3. Fig. 2. All possible options and probabilities of occurrence of the C-NOT gate output states when two photons achieve the gate inputs (the case of correct gate activation is highlighted with a blue vertical bar)

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4. Fig. 3. Graphs of dependences of the given state probability at the output of the beam splitter 1/2 on the deviation θ and ϕ from the given value

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5. Fig. 4. Graph of dependences of the given state probability at the output of the beam splitter 1/3 on the deviation θ from the given value

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6. Fig. 5. Graphs of dependences of the given state probability at the output of the beam splitter 1/3 on the deviation ϕ from the given value

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7. Fig. 6. Graphs of dependences of the given state probability at the output of the beam splitters 1 / 2 on the deviation θ from the given value

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8. Fig. 7. Graphs of dependences of the given state probability at the output of the beam splitters 1/2 on the deviation ϕ from a given value

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9. Fig. 8. Graph of dependences of the given state probability at the output of the beam splitter 1/3 on the deviation θ

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10. Fig. 9. Graph of dependences of the given state probability at the output of the beam splitter 1/3 on the deviation ϕ

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Copyright (c) 2023 Petrov V.M., Koroteev D.A., Semisalov D.A., Strashilin V.S., Khlusevich D.S., Yakovlev M.I., Parfenov M.V.

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