Title:

**SUPERCONDUCTING CIRCUIT AND QUANTUM COMPUTER**

Document Type and Number:

WIPO Patent Application WO/2021/014888

Kind Code:

A1

Abstract:

Provided are a superconducting circuit and a quantum computer which are capable of achieving a four body interaction, while suppressing the amount of hardware. A superconducting circuit (1) comprises four superconducting quantum bit circuits (10), and a coupling circuit (20) inductively coupled with 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. If, among the four the superconducting quantum bit circuits (10), the number of superconducting quantum bit circuits (10) that assume the first phase state is an even number, an interaction term of the Hamiltonian of the superconducting circuit (1) takes a first value. If, among the four the superconducting quantum bit circuits (10), the number of superconducting quantum bit circuits (10) that assume the first phase state is an odd number, the interaction term takes a second value.

Inventors:

HASEGAWA MASAHIRO (JP)

YAMAMOTO TSUYOSHI (JP)

HASHIMOTO YOSHIHITO (JP)

YAMAMOTO TSUYOSHI (JP)

HASHIMOTO YOSHIHITO (JP)

Application Number:

PCT/JP2020/025248

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**Foreign References:

JP2018533106A | 2018-11-08 |

Other References:

CHANCELLOR N; ZOHREN S; WARBURTON P A: "Circuit design for multi-body interactions in superconducting quantum annealing systems with applications to a scalable architecture", ARXIV, 13 October 2017 (2017-10-13), pages 1 - 11, XP081401133, Retrieved from the Internet [retrieved on 20200911]

Attorney, Agent or Firm:

IEIRI Takeshi (JP)

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