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MICROWAVE PHOTON CONTROL DEVICE, MICROWAVE PHOTON TRANSMITTER, MICROWAVE PHOTON RECEIVER, MICROWAVE PHOTON REPEATER, AND QUANTUM COMPUTER

Foreign code F210010594
File No. E128P12WO
Posted date 2021年11月4日
Country 世界知的所有権機関(WIPO)
International application number 2020JP049180
International publication number WO 2021140995
Date of international filing 令和2年12月28日(2020.12.28)
Date of international publication 令和3年7月15日(2021.7.15)
Priority data
  • 特願2020-001696 (2020.1.8) JP
Title MICROWAVE PHOTON CONTROL DEVICE, MICROWAVE PHOTON TRANSMITTER, MICROWAVE PHOTON RECEIVER, MICROWAVE PHOTON REPEATER, AND QUANTUM COMPUTER
Abstract Provided is a microwave photon control device that includes: a first quantum bit and a second quantum bit that are respectively connected in parallel to a waveguide through which microwave photons are propagated; and a direct coupling between the first quantum bit and the second quantum bit. The interval between the first quantum bit and the second quantum bit is (1/4+n/2) times the microwave-photon wavelength (wherein n is an integer that is equal to or greater than 0). Quantum entanglement is formed between the first quantum bit and the second quantum bit. The direct coupling cancels out coupling between the first quantum bit and the second quantum bit via the waveguide. As a result of the relaxation rates of the first quantum bit and the second quantum bit and the phase of the quantum entanglement being controlled, a first operation mode, a second operation mode, and a third operation mode are implemented by switching among said operation modes.
Outline of related art and contending technology BACKGROUND ART
Techniques have been proposed in which a quantum network is formed by connecting chips on which qubits are mounted to each other using propagation of microwave photons (photons having energy in the microwave range of a wavelength of several cm) (for example, see NpL 1 and NpL 2).
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
  • Inventor
  • KONO Shingo
  • NAKAMURA Yasunobu
IPC(International Patent Classification)
Specified countries National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS IT JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN WS ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
Reference ( R and D project ) ERATO NAKAMURA Macroscopic Quantum Machines AREA
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