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SYSTEM AND METHOD FOR PARALLEL IMPLEMENTATION OF MULTI-QUBIT QUANTUM GATES
Publication No.
EP3997631
•
App No.
EP20750953
•
Filed by
President and Fellows of Harvard College
•
Filed on
2020-07-10
•
Issued/Published on
2025-12-17
Publication No.
EP3997631
A1
Application No.
EP20750953
Filed: 2020-07-10
Grant Date
2025-12-17
Mention of grant
Active Oppositions
1 Active
EPO Oppositions
Patent Abstract / Summary
Patent abstract is being processed or was not provided in English by the publishing office.
IPC Classifications
G06N10/40, G21K1/00, // G06N10/20
G06N10/00
Priority Claims
US 201962873009P
Date: 2019-07-11
Designated Contracting States (38 EPC States)
AL
AT
BE
BG
CH
CY
CZ
DE
DK
EE
ES
FI
FR
GB
GR
HR
HU
IE
IS
IT
LI
LT
LU
LV
MC
MK
MT
NL
NO
PL
PT
RO
RS
SE
SI
SK
SM
TR
Parties & Representation
Applicants
President and Fellows of Harvard College
17 Quincy Street, Cambridge, MA 02138
USMassachusetts Institute of Technology
77 Massachusetts Avenue, Cambridge, MA 02139
USInventors (10)
PICHLER, Hannes
550 E. California Blvd., Apt. 2, Pasadena, CA 91106
USLEVINE, Harry, Jay
1537 Cambridge Street, Cambridge, MA 02139
USLUKIN, Mikhail, D.
17 Oxford Street, Cambridge, MA 02138
USOMRAN, Ahmed
17 Oxford Street, Cambridge, MA 02138
USKEESLING CONTRERAS, Alexander
17 Oxford Street, Cambridge, MA 02138
USSEMEGHINI, Giulia
17 Oxford Street, Cambridge, MA 02138
USVULETIC, Vladan
9 Union Street, Cambridge, MA 02139
USGREINER, Markus
17 Oxford Street, Cambridge, MA 02138
USWANG, Tout
17 Oxford Street, Cambridge, MA 02138
USEBADI, Sepehr
17 Oxford Street, Cambridge, MA 02138
USRepresentatives / Agents
Peterreins Schley
Patent- und Rechtsanwälte PartG mbB, Hermann-Sack-Straße 3
DEGraham Watt & Co LLP
St. Botolph's House, 7-9 St. Botolph's Road
GBGruber, Philipp
Schwarz & Partner, Patentanwälte
ATKey Procedural Dates
Request-For-Examination
2022-01-21
Mention Of Grant Published
2025-12-17
First-Examination-Report-Despatched
2024-10-09
Patent Oppositions
Official opposition proceedings filed against European Patent EP3997631 under EPC Article 99.
#1
Opponent
Company
Schwarz & Partner Patentanwälte GmbH
Wipplingerstraße 30, AT
Representative
Gruber, Philipp
Filing
Date
Opposition in Progress
2026-09-17
Legal Status & Event History
Official European Patent Office legal and procedural status changes recorded for this file.
| Date | Code | Event Description | Auth |
|---|---|---|---|
| 2021-01-18 | STAA | INFORMATION ON THE STATUS OF AN EP PATENT APPLICATION OR GRANTED EP PATENT | EP |
| 2020-08-13 | STAA | INFORMATION ON THE STATUS OF AN EP PATENT APPLICATION OR GRANTED EP PATENT | EP |
| 2022-04-15 | PUAI | PUBLIC REFERENCE MADE UNDER ARTICLE 153(3) EPC TO A PUBLISHED INTERNATIONAL APPLICATION THAT HAS ENTERED THE EUROPEAN PHASE | EP |
| 2022-04-15 | STAA | INFORMATION ON THE STATUS OF AN EP PATENT APPLICATION OR GRANTED EP PATENT | EP |
| 2022-05-18 | 17P | REQUEST FOR EXAMINATION FILED | EP |
| 2022-05-18 | AK | DESIGNATED CONTRACTING STATES | EP |
| 2024-09-23 | TPAC | OBSERVATIONS FILED BY THIRD PARTIES | EP |
| 2024-10-10 | STAA | INFORMATION ON THE STATUS OF AN EP PATENT APPLICATION OR GRANTED EP PATENT | EP |
| 2024-11-13 | 17Q | FIRST EXAMINATION REPORT DESPATCHED | EP |
| 2025-04-16 | TPAC | OBSERVATIONS FILED BY THIRD PARTIES | EP |
| 2025-06-13 | REG | REFERENCE TO A NATIONAL CODE | EP |
| 2025-07-23 | RIC1 | INFORMATION PROVIDED ON IPC CODE ASSIGNED BEFORE GRANT | EP |
| 2025-07-23 | GRAP | DESPATCH OF COMMUNICATION OF INTENTION TO GRANT A PATENT | EP |
| 2025-07-23 | STAA | INFORMATION ON THE STATUS OF AN EP PATENT APPLICATION OR GRANTED EP PATENT | EP |
| 2025-08-06 | RIC1 | INFORMATION PROVIDED ON IPC CODE ASSIGNED BEFORE GRANT | EP |
| 2025-08-13 | RIC1 | INFORMATION PROVIDED ON IPC CODE ASSIGNED BEFORE GRANT | EP |
| 2025-08-27 | INTG | INTENTION TO GRANT ANNOUNCED | EP |
| 2025-11-08 | GRAS | GRANT FEE PAID | EP |
| 2025-11-14 | GRAA | (EXPECTED) GRANT | EP |
| 2025-11-14 | STAA | INFORMATION ON THE STATUS OF AN EP PATENT APPLICATION OR GRANTED EP PATENT | EP |
| 2025-12-17 | AK | DESIGNATED CONTRACTING STATES | EP |
| 2025-12-17 | REG | REFERENCE TO A NATIONAL CODE | EP |
| 2025-12-31 | REG | REFERENCE TO A NATIONAL CODE | EP |
| 2026-02-18 | U01 | REQUEST FOR UNITARY EFFECT FILED | EP |
| 2026-02-25 | U07 | UNITARY EFFECT REGISTERED | EP |
| 2026-04-13 | PG25 | LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO] | EP |
| 2026-04-14 | PG25 | LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO] | EP |
| 2026-04-17 | PG25 | LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO] | EP |
| 2026-07-03 | PG25 | LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO] | EP |
| 2026-07-08 | PG25 | LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO] | EP |
| 2026-07-09 | PG25 | LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO] | EP |
| 2026-07-14 | VS25 | LAPSED IN A VALIDATION STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NAT. OFFICE TO EPO] | EP |
| 2026-07-18 | PG25 | LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO] | EP |
| 2026-07-21 | PG25 | LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO] | EP |
| 2026-07-25 | PG25 | LAPSED IN A CONTRACTING STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NATIONAL OFFICE TO EPO] | EP |
| 2026-08-18 | VS25 | LAPSED IN A VALIDATION STATE [ANNOUNCED VIA POSTGRANT INFORMATION FROM NAT. OFFICE TO EPO] | EP |
| 2026-09-02 | U20 | RENEWAL FEE FOR THE EUROPEAN PATENT WITH UNITARY EFFECT PAID | EP |
| 2026-09-18 | PLBI | OPPOSITION FILED | EP |
| 2026-09-23 | REG | REFERENCE TO A NATIONAL CODE | EP |
| 2026-09-25 | PLAB | OPPOSITION DATA, OPPONENT'S DATA OR THAT OF THE OPPONENT'S REPRESENTATIVE MODIFIED | EP |
| 2026-09-30 | REG | REFERENCE TO A NATIONAL CODE | EP |
| 2026-10-01 | PLAX | NOTICE OF OPPOSITION AND REQUEST TO FILE OBSERVATION + TIME LIMIT SENT | EP |
Patent & Non-Patent Citations
Cited documents and prior art referenced in search and examination reports.
Non-Patent Scientific Literature (NPL)
- DITTE MOLLER; LARS BOJER MADSEN; KLAUS MOLMER: "Quantum gates and multi-particle entanglement by Rydberg excitation blockade and adiabatic passage", ARXIV.ORG, CORNELL UNIVERSITY LIBRARY, 201 OLIN LIBRARY CORNELL UNIVERSITY ITHACA, NY 14853, 25 February 2008 (2008-02-25), 201 Olin Library Cornell University Ithaca, NY 14853 , XP080401876, DOI: 10.1103/PhysRevLett.100.170504
- HUAIZHI WU; XI-RONG HUANG; CHANG-SHENG HU; ZHEN-BIAO YANG; SHI-BIAO ZHENG: "Rydberg-interaction gates via adiabatic passage and phase control of driving fields", ARXIV.ORG, CORNELL UNIVERSITY LIBRARY, 201 OLIN LIBRARY CORNELL UNIVERSITY ITHACA, NY 14853, 14 March 2018 (2018-03-14), 201 Olin Library Cornell University Ithaca, NY 14853 , XP080864429, DOI: 10.1103/PhysRevA.96.022321
- HARRY LEVINE; ALEXANDER KEESLING; GIULIA SEMEGHINI; AHMED OMRAN; TOUT T. WANG; SEPEHR EBADI; HANNES BERNIEN; MARKUS GREINER; VLADA: "Parallel implementation of high-fidelity multi-qubit gates with neutral atoms", ARXIV.ORG, CORNELL UNIVERSITY LIBRARY, 201 OLIN LIBRARY CORNELL UNIVERSITY ITHACA, NY 14853, 16 August 2019 (2019-08-16), 201 Olin Library Cornell University Ithaca, NY 14853 , XP081464576
- CHI ZHANG; FABIAN POKORNY; WEIBIN LI; GERARD HIGGINS; ANDREAS P\"OSCHL; IGOR LESANOVSKY; MARKUS HENNRICH: "Sub-microsecond entangling gate between trapped ions via Rydberg interaction", ARXIV.ORG, CORNELL UNIVERSITY LIBRARY, 201 OLIN LIBRARY CORNELL UNIVERSITY ITHACA, NY 14853, 29 August 2019 (2019-08-29), 201 Olin Library Cornell University Ithaca, NY 14853 , XP081489398
- SAFFMAN M, BETEROV I I, DALAL A, PÁEZ E J, SANDERS B C: "Symmetric Rydberg C Z gates with adiabatic pulses", ARXIV.ORG, CORNELL UNIVERSITY LIBRARY, 6 December 2019 (2019-12-06), pages 1 - 8, XP093438987, Retrieved from the Internet <URL:https://arxiv.org/pdf/1912.02977v1>
- JAKSCH D ET AL: "Fast quantum gates for neutral atoms", ARXIV.ORG, CORNELL UNIVERSITY LIBRARY, 201 OLIN LIBRARY CORNELL UNIVERSITY ITHACA, NY 14853, 7 April 2000 (2000-04-07), XP080017966, DOI: 10.1103/PHYSREVLETT.85.2208
- KEATING TYLER ET AL: "Robust quantum logic in neutral atoms via adiabatic Rydberg dressing", PHYSICAL REVIEW A (ATOMIC, MOLECULAR, AND OPTICAL PHYSICS), vol. 91, no. 1, 1 January 2015 (2015-01-01), USA, XP093209984, ISSN: 1050-2947, Retrieved from the Internet <URL:https://arxiv.org/pdf/1411.2622v3> DOI: 10.1103/PhysRevA.91.012337
Worldwide Patent Family
Related applications and patents in the same INPADOC worldwide family.
| Country | Publication Number | Kind | Publication Date | Action |
|---|---|---|---|---|
| EP | EP3997631A1 | A1 | 2022-05-18 | Espacenet |
| EP | EP3997631B1 | B1 | 2025-12-17 | Espacenet |
| EP | EP3997631C0 | C0 | 2025-12-17 | Espacenet |
| AU | AU2020309601A1 | A1 | 2022-02-03 | Espacenet |
| AU | AU2020309601B2 | B2 | 2026-05-07 | Espacenet |
| AU | AU2026213970A1 | A1 | 2026-08-20 | Espacenet |
| CA | CA3144798A1 | A1 | 2021-01-14 | Espacenet |
| CN | CN114245900A | A | 2022-03-25 | Espacenet |
| EP | EP4730363A2 | A2 | 2026-04-22 | Espacenet |
| EP | EP4730363A3 | A3 | 2026-06-24 | Espacenet |
| IL | IL289635A | A | 2022-03-01 | Espacenet |
| JP | JP2022540417A | A | 2022-09-15 | Espacenet |
| JP | JP7612652B2 | B2 | 2025-01-14 | Espacenet |
| JP | JP2025041850A | A | 2025-03-26 | Espacenet |
| JP | JP7842190B2 | B2 | 2026-04-07 | Espacenet |
| JP | JP2026116286A | A | 2026-07-09 | Espacenet |
| KR | KR20220061951A | A | 2022-05-13 | Espacenet |
| US | US20240289665A1 | A1 | 2024-08-29 | Espacenet |
| US | US12548688B2 | B2 | 2026-02-10 | Espacenet |
| US | US20260245766A1 | A1 | 2026-08-20 | Espacenet |
| WO | WO2021007560A1 | A1 | 2021-01-14 | Espacenet |
Official File Inspection
EPC Art. 128 Public Dossier
Complete European Patent Register Dossier (148 Total Documents)
The full inspection file for Application EP20750953 contains 148 total documents, including all notices of opposition, proprietor counter-statements, examination communications, third-party observations, and procedural forms. Below are all major recorded procedural filings and publication specifications.
Recorded Filings & Patent Specifications
Official publication specifications, opposition filings, proprietor replies, and procedural submissions.
European Patent Specification - Granted Patent (B1)
Publication Specification
Date: 2025-12-17
Procedure: Grant
EP3997631B1
Official European Patent Register Full Dossier
Publication Specification
Date: 2025-12-17
Procedure: All Proceedings (Examination & Opposition)
EP20750953
European Patent Application with Search Report (A1)
Publication Specification
Date: 2021-01-14
Procedure: Publication
EP3997631A1
New entry: Communication of a notice of opposition and request to file observations + time limit
Dossier Filing
Date: 2026-10-01
Procedure: Opposition
EPIDOSNOBS2
Invitation to proprietor to file observations on the notice of opposition
Procedural Step
Date: 2026-10-01
Procedure: Opposition
OBSO
Change - opposition data/opponent's data or that of the opponent's representative
Dossier Filing
Date: 2026-09-25
Procedure: Opposition
0009299OPPO
Opposition filed
Dossier Filing
Date: 2026-09-18
Procedure: Opposition
0009260
Lapse of the patent in a contracting state
Dossier Filing
Date: 2026-07-31
Procedure: Examination
0009250
Lapse of the patent in a contracting state
Dossier Filing
Date: 2026-07-24
Procedure: Examination
0009250
Lapse of the patent in a contracting state
Dossier Filing
Date: 2026-07-10
Procedure: Examination
0009250
Lapse of the patent in a contracting state
Dossier Filing
Date: 2026-04-24
Procedure: Examination
0009250
Lapse of the patent in a contracting state
Dossier Filing
Date: 2026-04-17
Procedure: Examination
0009250
Change - divisional application(s)
Dossier Filing
Date: 2025-12-19
Procedure: Examination
0008299DANR
(Expected) grant
Dossier Filing
Date: 2025-11-14
Procedure: Grant
0009210
New entry: Payment of fee for grant
Dossier Filing
Date: 2025-11-08
Procedure: Grant
EPIDOSNIGR3
New entry: Payment of fee for publishing/printing
Dossier Filing
Date: 2025-11-08
Procedure: Examination
EPIDOSNIGR5
New entry: Receipt of the translation of the claim(s)
Dossier Filing
Date: 2025-11-08
Procedure: Examination
EPIDOSNIGR7
Change - representative
Dossier Filing
Date: 2025-08-05
Procedure: Examination
EPIDOS FREP
New entry: Renewal fee paid
Dossier Filing
Date: 2025-07-29
Procedure: Examination
EPIDOSNRFE2
Renewal fee payment
Procedural Step
Date: 2025-07-28
Procedure: Examination
RFEE
New entry: Communication of intention to grant a patent
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Date: 2025-07-23
Procedure: Grant
EPIDOSNIGR1
Intention to grant the patent
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Date: 2025-07-23
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IGRA
Change - classification
Dossier Filing
Date: 2025-07-11
Procedure: Examination
0008199IPCL
Change - classification
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Date: 2025-07-04
Procedure: Examination
0008199IPCL
Change - German title
Dossier Filing
Date: 2025-07-04
Procedure: Examination
0008199TIDE
Change - classification
Dossier Filing
Date: 2025-06-20
Procedure: Examination
0008199IPCL
New entry: Observations by third parties
Dossier Filing
Date: 2025-04-16
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EPIDOSNTIPA
Observations by a third party
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Date: 2025-04-14
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TIPA
New entry: Reply to examination report
Dossier Filing
Date: 2025-02-07
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EPIDOSNEXR3
First examination report
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Date: 2024-10-11
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0009185
New entry: Despatch of examination report + time limit
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Date: 2024-10-10
Procedure: Examination
EPIDOSNEXR2
Communication from the examining division
Procedural Step
Date: 2024-10-09
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EXRE
New entry: Observations by third parties
Dossier Filing
Date: 2024-09-23
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EPIDOSNTIPA
Observations by a third party
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Date: 2024-09-22
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TIPA
New entry: Renewal fee paid
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Date: 2024-07-29
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EPIDOSNRFE2
Renewal fee payment
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RFEE
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Dossier Filing
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RFEE
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EPIDOSNRFE2
Renewal fee payment
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EPIDOSNEXAM52
Request for examination filed
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Date: 2022-04-15
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0009171
PCT data prior to European publication
Dossier Filing
Date: 2022-02-02
Procedure: Examination
EPIDOS PCT
New entry: Fee payment for extension state
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Date: 2022-01-24
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EPIDOSNEXP2
PCT data prior to European publication
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EPIDOS PCT
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EPIDOSNVAP2
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Payment of the first designation fee
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Date: 2022-01-21
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EXAM52
Extension of the patent
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EXPT
PCT data prior to European publication
Dossier Filing
Date: 2022-01-12
Procedure: Examination
EPIDOS PCT
PCT data prior to European publication
Dossier Filing
Date: 2022-01-11
Procedure: Examination
EPIDOS PCT
Change - representative
Dossier Filing
Date: 2022-01-10
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EPIDOS FREP
PCT data prior to European publication
Dossier Filing
Date: 2022-01-10
Procedure: Examination
EPIDOS PCT
New entry: applicant or inventor
Dossier Filing
Date: 2021-12-17
Procedure: Examination
EPIDOSNWIAI
PCT data prior to European publication
Dossier Filing
Date: 2021-01-18
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EPIDOS PCT
New entry: applicant or inventor
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Date: 2021-01-18
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EPIDOSNWIAI
PCT data prior to European publication
Dossier Filing
Date: 2020-08-13
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EPIDOS PCT
Language of the procedure
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PROL
International searching authority
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ISAT