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1. WO2020068762 - JOSEPHSON PHASE-SLIP QUBITS

Publication Number WO/2020/068762
Publication Date 02.04.2020
International Application No. PCT/US2019/052616
International Filing Date 24.09.2019
IPC
H01L 39/02 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
39Devices using superconductivity or hyperconductivity; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof
02Details
G06F 11/10 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
11Error detection; Error correction; Monitoring
07Responding to the occurrence of a fault, e.g. fault tolerance
08Error detection or correction by redundancy in data representation, e.g. by using checking codes
10Adding special bits or symbols to the coded information, e.g. parity check, casting out nines or elevens
H01L 29/06 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
29Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having at least one potential-jump barrier or surface barrier; Capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof
02Semiconductor bodies
06characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions
H01L 39/24 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
39Devices using superconductivity or hyperconductivity; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof
24Processes or apparatus specially adapted for the manufacture or treatment of devices provided for in group H01L39/135
H03K 17/92 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
17Electronic switching or gating, i.e. not by contact-making and -breaking
51characterised by the use of specified components
92by the use, as active elements, of superconductive devices
CPC
G06N 10/00
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
NCOMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS
10Quantum computers, i.e. computer systems based on quantum-mechanical phenomena
H03K 19/1952
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
19Logic circuits, i.e. having at least two inputs acting on one output
02using specified components
195using superconductive devices
1952with electro-magnetic coupling of the control current
Applicants
  • MASSACHUSETTS INSTITUTE OF TECHNOLOGY [US]/[US]
Inventors
  • KERMAN, Andrew, J.
Agents
  • BLAU, David, E.
  • DALY, Christopher, S.
  • KIM, Do Te
  • PONIKIEWICZ, Kellan, D.
  • DIMOV, Kiril, O.
  • SICARD, Keri, E.
  • ROBINSON, Kermit
  • MOOSEY, Anthony, T.
  • DURKEE, Paul, D.
  • CROWLEY, Judith, C.
  • MOFFORD, Donald, F.
  • DOWNING, Marianne, M.
  • DUBUC, Marisa, J.
  • LANGE, Kristoffer, W.
Priority Data
62/737,37227.09.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) JOSEPHSON PHASE-SLIP QUBITS
(FR) BITS QUANTIQUES À GLISSEMENT DE PHASE JOSEPHSON
Abstract
(EN)
A qubit includes a superconducting loop interrupted by a plurality of magnetic flux tunneling elements, such as DC SQUIDs, leaving superconducting islands between the elements. An effective transverse magnetic moment is formed by magnetically tuning each element to yield a large tunneling amplitude. The electrical polarization charge on an island is tuned to produce destructive interference between the tunneling amplitudes using the Aharonov-Casher effect, resulting in an effectively zero transverse field. Biasing the charge away from this tuning allows tunneling to resume with a large amplitude. Interrupting the island with a third tunneling path, such as a Josephson junction, permits independently tuning and biasing the two islands that result, enabling effective control of two independent (X and Y) transverse fields.
(FR)
La présente invention concerne un bit quantique qui comprend une boucle supraconductrice interrompue par une pluralité d'éléments à effet tunnel de flux magnétique, tels que des SQUID à courant continu, laissant des îlots supraconducteurs entre les éléments. Un moment magnétique transversal efficace est formé par accord magnétique de chaque élément pour produire une grande amplitude par effet tunnel. La charge de polarisation électrique sur un îlot est accordée pour produire une interférence destructive entre les amplitudes par effet tunnel à l'aide de l'effet Aharonov-Casher, conduisant à un champ transversal effectivement nul. La polarisation de la charge à l'opposé de cet accord permet à l'effet tunnel de reprendre avec une grande amplitude. L'interruption de l'îlot avec un troisième trajet à effet tunnel, tel qu'une jonction Josephson, permet d'accorder et de polariser indépendamment les deux îlots résultants, ce qui permet une commande efficace de deux champs transversaux indépendants (X et Y).
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