Title:

**SUPERCONDUCTING CIRCUIT AND QUANTUM COMPUTER**

Document Type and Number:

WIPO Patent Application WO/2021/014889

Kind Code:

A1

Abstract:

Provided are a superconducting circuit and a quantum computer which are capable of achieving a four body interaction by means of a plurality of superconducting quantum bit circuits to which signals of the same frequency are supplied. A superconducting circuit (1) comprises four superconducting quantum bit circuits (10), and a coupling circuit (20) directly connected to the four superconducting quantum bit circuits (10). The superconducting quantum bit circuits (10) each represent a quantum bit by assuming a first phase state or a second phase state. When, among the four superconducting quantum bit circuits (10), the number of superconducting quantum bit circuits (10) assuming the first phase state is an even number, an interaction term of the Hamiltonian of the superconducting circuit (1) takes a first value. When, among the four superconducting quantum bit circuits (10), the number of superconducting quantum bit circuits (10) assuming the first phase state is an odd number, the interaction term takes a second value.

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Inventors:

HASEGAWA MASAHIRO (JP)

YAMAMOTO TSUYOSHI (JP)

HASHIMOTO YOSHIHITO (JP)

YAMAMOTO TSUYOSHI (JP)

HASHIMOTO YOSHIHITO (JP)

Application Number:

PCT/JP2020/025253

Publication Date:

January 28, 2021

Filing Date:

June 26, 2020

Export Citation:

Assignee:

NEC CORP (JP)

International Classes:

*;*

**H01L39/22***;*

**G06F7/38***;*

**G06N10/00***;*

**G06N99/00**

**H03K19/195**Other References:

PURI, SHRUTI: "Quantum annealing with a network of all-to-all connected, two-photon driven Kerr nonlinear oscillators", ARXIV, 22 September 2016 (2016-09-22), pages 1 - 10, XP080813092, Retrieved from the Internet [retrieved on 20200923]

Attorney, Agent or Firm:

IEIRI Takeshi (JP)

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