Quantum simulator and quantum simulation method

Patent metadata

Field	Value
Publication number	US-11567450-B2
Application number	US-202017029520-A
Country	US
Kind code	B2
Filing date	Sep 23, 2020
Priority date	Apr 10, 2017
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

A quantum simulator includes a pseudo speckle pattern generator, a main vacuum chamber, an atomic gas supply unit, a light beam generator, a photodetector, and an atom number detector. The pseudo speckle pattern generator generates a pseudo speckle pattern in the inside of the main vacuum chamber by light allowed to enter the inside of the main vacuum chamber through the second window. The pseudo speckle pattern generator includes a controller, a light source, a beam expander, a spatial light modulator, and a lens. The controller sets a modulation distribution of the spatial light modulator based on a two-dimensional pseudo random number pattern.

First claim

What is claimed is:

1. A quantum simulator, comprising:
a chamber having a window;
a pseudo speckle pattern generator configured to generate a pseudo speckle pattern in the inside of the chamber by light allowed to enter the inside of the chamber through the window; and
a detector configured to detect an influence of generation of the pseudo speckle pattern on an atom in the inside of the chamber, wherein
the pseudo speckle pattern generator includes:
a light source configured to output light,
a spatial light modulator configured to have a modulation distribution of a phase, spatially modulate the light output from the light source in accordance with the modulation distribution, and output the modulated light,
a reproducing optical system configured to input the light output from the spatial light modulator to reproduce the pseudo speckle pattern in the inside of the chamber, and
a controller configured to set a computer generated hologram obtained based on a two-dimensional pseudo random number pattern as the modulation distribution of the spatial light modulator, wherein
to set the computer generated hologram as the modulation distribution of the spatial light modulator, the controller is configured to:
generate, as a first pattern, the two-dimensional pseudo random number pattern expressing a light intensity statistical distribution for generating the pseudo speckle pattern,
prepare a correlation function expressing a spatial structure for generating the pseudo speckle pattern,
generate, as a second pattern, a pattern of inverse Fourier transform of a square root of Fourier transform of the correlation function,
calculate the modulation distribution based on a pattern of convolution integral of the first pattern and the second pattern, and
set the modulation distribution to the spatial light modulator.

2. The quantum simulator according to claim 1 , further comprising an atomic gas supply unit configured to supply an atomic gas to the inside of the chamber.

3. The quantum simulator according to claim 1 , further comprising a light beam generator configured to generate a light beam emitted to the inside of
the chamber through the window to trap the atom in the inside of the chamber.

Assignees

• Hamamatsu Photonics Kk
• Inter Univ Research Institute Corporation National Institutes Of Natural Sciences
• Inter Univ Research Institute Corporation

Inventors

• Sakai Hiroto
• Ohmori Kenji
• Ando Taro
• Takei Nobuyuki
• Toyoda Haruyoshi
• Ohtake Yoshiyuki
• HYODO Tomoko
• Takiguchi Yuu

Classifications

• G03H1/16 Primary

  using Fourier transform ({G03H1/10}, G03H1/12, G03H1/14 take precedence; analogue computers G06G, e.g. G06G7/19) · CPC title

• G03H2001/0441

  Formation of interference pattern, not otherwise provided for · CPC title

• G03H2225/30

  Modulation · CPC title

• H05H3/00

  Production or acceleration of neutral particle beams, e.g. molecular or atomic beams · CPC title

• G03H1/0005 Primary

  Adaptation of holography to specific applications (holographic optical element G02B5/32; holographic scanner G02B26/106; recognition using holographic mask G06V10/88; holographic memories G11B7/0065, G11C13/042) · CPC title