Scalable Rare Earth Ion Quantum Computing Nodes

Project Information

SQUARE

Grant agreement ID: 820391

DOI

10.3030/820391

Project closed

EC signature date 4 September 2018

Start date 1 October 2018

End date 31 March 2022

Funded under

• EXCELLENT SCIENCE - Future and Emerging Technologies (FET)

Total cost

€ 2 990 277,50

EU contribution

€ 2 990 277,50

Coordinated by

KARLSRUHER INSTITUT FUER TECHNOLOGIE
Germany

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Links to deliverables and publications from FP7 projects, as well as links to some specific result types such as dataset and software, are dynamically retrieved from OpenAIRE .

Deliverables

Documents, reports (21)

Limiting mechanisms for high-fidelity gates

Demonstration of a gate fidelity 995 with isotopically pure Eu153 ensembles and investigation of limiting factors

Advanced laser source tested in experiment

Report on an experimental test of the developed laser source with Er ion spectroscopy

Two-qubit gates with EU ions

Demonstration of a controlled NOT quantum gate with two Eu ions and selective Purcell enhancement

Stoichiometric materials

Report on an investigation of growth of highquality stoichiometric crystals such as Eu2O3 and assessment of their potential for a thin film material

Single ion gates

Demonstration of high fidelity single qubit gates with Eu3+, Nd3+, Ce3+ coupled to 29Si, and Er3+.

Structure of doped of Y2O3 thin films

Report on heteroepitaxial growth of Y2O3 thin films suitable for membranes, and on homoepitaxial growth of Y2SiO5 films.

Optical quantum state distribution schemes

Report on schemes for distillation of multipartite entanglement and for keeping a multipartite entangled state alive by repeated communication and local register operations

Performance of YSO and Y2O3 thin films

Report on the optical and spin performance of optimized YSO and Y2O3 thin films

Single REI coupled to integrated cavity

Coupling of Er ions to an integrated microcavity for Purcellenhanced single ion detection

Multi-qubit gates and operations

We will develop theoretical protocols that employ the simultaneous interaction among all ions or between a central bus ion and all qubit ions for multiqubit gates and preparation of multiparticle entangled states in few operations The advantage of multiqubit gates in algorithms and in decoherence free subspace and error correcting codes will be explored

Electrically tunable integrated microcavity

Report on electrically tunable integrated LiNbO3 microcavities coupled to RE emitters from Lithium Niobate single crystal thin films transferred onto an arbitrary substrate, and shaped into on-chip photonic circuits.

Technology readiness of RE QC

Roadmap based on the investigation of the protocols materials and technology required to put together the different aspects of rareearth ion work into a concept for a scalable rareearth ion quantum computer including the readiness of the technology

Dissemination and exploitation plan

Dissemination and exploitation plan for NanOQTech's outputs.

Indistinguishable photons from Er

Generation of indistinguishable photons from a single Er ion coupled to a fiber cavity

Dissemination report

Report on all project related dissemination

Multi-node entanglement schemes

Report on resource efficient multi-node gates and generation of multi-node entangled states.

Control by bus ion

Report on the demonstration that different ion species with different functionality can control each other at the single ion level

Single shot readout

Demonstration of schemes for highfidelity singleshot readout of single ions and development of theoretical schemes

Quantum interference between photons

Report on quantum interference HongOuMandel with photons emitted by two single ions

Coupling two qubits in separated cavities

Report on the demonstration of tunable coupling between two Er3 ions in two separate cavities connected with a waveguide

Few-Eu-qubit entangled state

Generation of a multiqubit entangled state with Eu from a repetitive CNOT operation using a single control ion and several target ions in a fiber cavity

Open Research Data Pilot (1)

Data Management Plan

Data Management Plan documenting the guidelines for data collection, generation and handling by the SQUARE consortium during and after the project.

Other (4)

Web site and logo

Launch of a Project website and presentation of a project logo.

FFPC Product brochure and specifications

Report on a product brochure on tunable fiber cavities with detailed specifications as derived from statistics of fabrication of fiber cavities. Cavity demonstration data and example applications will be publicly advertised.

Mini summer-school

Organization of a mini summer-school

Technology workshop

Organization of a technology workshop targeting audiences in both industry and academia to promote results discuss commercial exploitations and identify stakeholders and companies in quantum technologies

Demonstrators, pilots, prototypes (1)

Delivery of fiber cavities to test customer

Report on customer analysis for tunable fiber cavities and delivery to first external test customers

Publications

Peer reviewed articles (30)

Scalable production of solid-immersion lenses for quantum emitters in silicon carbide

Author(s): F. Sardi, T. Kornher, M. Widmann, R. Kolesov, F. Schiller, T. Reindl, M. Hagel, and J. Wrachtrup
Published in: Appl. Phys. Lett., Issue 117, 2, 2020, Page(s) 022105, ISSN 1077-3118
Publisher: American Institute of Physics
DOI: 10.1063/5.0011366

Controlling the interfacial reactions and environment of rare-earth ions in thin oxide films towards wafer-scalable quantum technologies

Author(s): Nao Harada; Alexandre Tallaire; Diana Serrano; Antoine Seyeux; Philippe Marcus; Xavier Portier; Christophe Labbé; Philippe Goldner; Alban Ferrier; Alban Ferrier
Published in: Materials Advances, Issue 3 / Issue 1, 2021, Page(s) 300-311, ISSN 2046-2069
Publisher: Royal Society of Chemistry
DOI: 10.1039/d1ma00753j

Chemically vapor deposited Eu 3+ :Y 2 O 3 thin films as a material platform for quantum technologies

Author(s): Nao Harada; Alban Ferrier; Diana Serrano; Mauro Persechino; Emrick Briand; Romain Bachelet; Ian Vickridge; J.-J. Ganem; Philippe Goldner; Alexandre Tallaire
Published in: Journal of Applied Physics, Issue Volume 128, Issue 5, 2020, Page(s) 055304, ISSN 2158-3226
Publisher: American Institute of Physics Inc.
DOI: 10.1063/5.0010833

Collective dynamics of inhomogeneously broadened emitters coupled to an optical cavity with narrow linewidth

Author(s): Kamanasish Debnath, Yuan Zhang, and Klaus Mølmer
Published in: Physical Review A, Issue 100 / 5, 2019, Page(s) 053821, ISSN 2469-9934
Publisher: American Physical Society
DOI: 10.1103/physreva.100.053821

Open-Cavity in Closed-Cycle Cryostat as a Quantum Optics Platform

Author(s): Samarth Vadia; Johannes Scherzer; Holger Thierschmann; Clemens Schäfermeier; Claudio Dal Savio; Takashi Taniguchi; Kenji Watanabe; David Hunger; Khaled Karrai; Alexander Högele
Published in: PRX quantum, Issue 2 / 4, 2021, Page(s) 040318, ISSN 2691-3399
Publisher: American Physical Society
DOI: 10.5445/ir/1000139460

Self-Stimulated Pulse Echo Trains from Inhomogeneously Broadened Spin Ensembles.

Author(s): Kamanasish Debnath; Gavin Dold; Gavin Dold; John J. L. Morton; Klaus Mølmer
Published in: Physical Review Letters, Issue 125, 2020, Page(s) 137702, ISSN 1079-7114
Publisher: American Physical Society
DOI: 10.1103/physrevlett.125.137702

Experimental implementation of precisely tailored light-matter interaction via inverse engineering

Author(s): Ying Yan; Chunyan Shi; Adam Kinos; Hafsa Syed; Sebastian P. Horvath; Andreas Walther; Lars Rippe; Xi Chen; Stefan Kröll
Published in: npj Quantum Information, Issue Vol 7, Iss 1, 2021, Page(s) Pp 1-10, article number 138, ISSN 2056-6387
Publisher: Springer Nature Limited
DOI: 10.1038/s41534-021-00473-4

Designing gate operations for single-ion quantum computing in rare-earth-ion-doped crystals

Author(s): Adam Kinos; Lars Rippe; Stefan Kröll; Andreas Walther
Published in: Physical Review A, Issue 104, 2021, Page(s) 052624, ISSN 2469-9934
Publisher: American Physical Society
DOI: 10.5281/zenodo.5959634

Optical and spin inhomogeneous linewidths in 171Yb3 +:Y2 SiO5

Author(s): Eloïse Lafitte-Houssat, Alban Ferrier, Sacha Welinski, Loïc Morvan, Mikael Afzelius, Perrine Berger, Philippe Goldner
Published in: Optical Materials: X, Issue Vol. 14, May 2022, 100153, 2022, Page(s) 100153, ISSN 2590-1478
Publisher: Elsevier
DOI: 10.1016/j.omx.2022.100153

Ancilla-mediated qubit readout and heralded entanglement between rare-earth dopant ions in crystals

Author(s): Kamanasish Debnath; Alexander Holm Kiilerich; Klaus Mølmer
Published in: Physical Review A, Issue 103 / 4, 2020, Page(s) 043705, ISSN 2469-9934
Publisher: American Physical Society
DOI: 10.1103/physreva.103.043705

Quantum interactions with pulses of radiation

Author(s): Alexander Holm Kiilerich; Klaus Mølmer
Published in: Physical Review A, Issue 102 / 2, 2020, Page(s) 023717, ISSN 2469-9934
Publisher: American Physical Society
DOI: 10.1103/physreva.102.023717

Harnessing Atomic Layer Deposition and Diffusion to Spatially Localize Rare-Earth Ion Emitters

Author(s): Alban Ferrier; Alban Ferrier; Nao Harada; Marion Scarafagio; Emrick Briand; J. J. Ganem; Ian Vickridge; Antoine Seyeux; Philippe Marcus; Diana Serrano; Philippe Goldner; Alexandre Tallaire
Published in: The Journal of Physical Chemistry, Issue 124, 2020, Page(s) 19725–19735, ISSN 1932-7447
Publisher: American Chemical Society
DOI: 10.1021/acs.jpcc.0c04019

Integration of the Berry curvature on a qubit state manifold by coupling to a quantum meter system

Author(s): Peng Xu; Shi-Liang Zhu; Shi-Liang Zhu; Klaus Mølmer; Alexander Holm Kiilerich
Published in: Physical Review A, Issue Volume 102, Issue 3, 2020, ISSN 2469-9934
Publisher: American Physical Society
DOI: 10.1103/physreva.102.032613

A Frequency-Multiplexed Coherent Electro-optic Memory in Rare Earth Doped Nanoparticles

Author(s): Alexandre Fossati; Shuping Liu; Shuping Liu; Jenny Karlsson; Akio Ikesue; Alexandre Tallaire; Alban Ferrier; Alban Ferrier; Diana Serrano; Philippe Goldner
Published in: Nano Lett. 2020, Issue 20, 10,, 2020, Page(s) 7087–7093, ISSN 1520-5126
Publisher: Amercian Chemical Society
DOI: 10.1021/acs.nanolett.0c02200

Optical spin-state polarization in a binuclear europium complex towards molecule-based coherent light-spin interfaces

Author(s): Kumar, Kuppusamy Senthil; Serrano, Diana; Nonat, Aline; Heinrich, Benoît; Karmazin, Lydia; Charbonnière, Loïc; Goldner, Philippe; Ruben, Mario
Published in: Nature communications, Issue 12, 2021, Page(s) 2152, ISSN 2041-1723
Publisher: Nature Publishing Group
DOI: 10.1038/s41467-021-22383-x

Tunable microcavities coupled to rare-earth quantum emitters

Author(s): Kangwei Xia, Fiammetta Sardi, Colin Sauerzapf, Thomas Kornher, Hans-Werner Becker, Zsolt Kis, Laszlo Kovacs, Denis Dertli, Jonas Foglszinger, Roman Kolesov, and Jörg Wrachtrup
Published in: Optica, Issue Vol. 9, Issue 4, 2022, Page(s) pp. 445-450, ISSN 2334-2536
Publisher: Optica publishing group
DOI: 10.1364/optica.453527

Deterministic Single-Ion Implantation of Rare-Earth Ions for Nanometer-Resolution Color-Center Generation

Author(s): Karin Groot-Berning, Thomas Kornher, Georg Jacob, Felix Stopp, Samuel T. Dawkins, Roman Kolesov, Jörg Wrachtrup, Kilian Singer, Ferdinand Schmidt-Kaler
Published in: Physical Review Letters, Issue 123/10, 2019, ISSN 0031-9007
Publisher: American Physical Society
DOI: 10.1103/PhysRevLett.123.106802

Coherent optical and spin spectroscopy of nanoscale Pr 3 + : Y 2

Author(s): D. Serrano, C. Deshmukh, S. Liu, A. Tallaire, A. Ferrier, H. de Riedmatten, P. Goldner
Published in: Physical Review B, Issue 100/14, 2019, ISSN 2469-9950
Publisher: American Physical Society
DOI: 10.1103/PhysRevB.100.144304

Input-Output Theory with Quantum Pulses

Author(s): Alexander Holm Kiilerich, Klaus Mølmer
Published in: Physical Review Letters, Issue 123/12, 2019, ISSN 0031-9007
Publisher: American Physical Society
DOI: 10.1103/PhysRevLett.123.123604

Coherent spectral hole burning and qubit isolation by stimulated Raman adiabatic passage

Author(s): Kamanasish Debnath, Alexander Holm Kiilerich, Albert Benseny, Klaus Mølmer
Published in: Physical Review A, Issue 100/2, 2019, ISSN 2469-9926
Publisher: American Physical Society
DOI: 10.1103/PhysRevA.100.023813

Sensing Individual Nuclear Spins with a Single Rare-Earth Electron Spin

Author(s): Thomas Kornher, Da-Wu Xiao, Kangwei Xia, Fiammetta Sardi, Nan Zhao, Roman Kolesov, and Jörg Wrachtrup
Published in: Physical Review Letters, Issue 124, 2020, Page(s) 106802, ISSN 0031-9007
Publisher: American Physical Society
DOI: 10.1103/physrevlett.124.170402

Subradiant bound dimer excited states of emitter chains coupled to a one dimensional waveguide

Author(s): Yu-Xiang Zhang, Chuan Yu, Klaus Mølmer
Published in: Physical Review Research, Issue 2/1, 2020, Page(s) 012173, ISSN 2643-1564
Publisher: American Phyical Society
DOI: 10.1103/PhysRevResearch.2.013173

Noise-free on-demand atomic frequency comb quantum memory

Author(s): Horvath, Sebastian P.; Alqedra, Mohammed K.; Kinos, Adam; Walther, Andreas; Dahlström, Jan Marcus; Kröll, Stefan; Rippe, Lars
Published in: Physical Review Research, Issue 3 / 2, 2021, Page(s) 023099, ISSN 2643-1564
Publisher: American Physical Society
DOI: 10.1103/PhysRevResearch.3.023099

Microscopic treatment of instantaneous spectral diffusion and its effect on quantum gate fidelities in rare-earth-ion-doped crystals

Author(s): Adam Kinos, Lars Rippe, Andreas Walther, and Stefan Kröll
Published in: Physical Review A, Issue 105 / 3, 2022, Page(s) 032608, ISSN 2469-9934
Publisher: American Physical Society
DOI: 10.5281/zenodo.6365321

Dynamic control of Purcell enhanced emission of erbium ions in nanoparticles.

Author(s): Bernardo Casabone; Chetan Deshmukh; Shuping Liu; Shuping Liu; Diana Serrano; Alban Ferrier; Alban Ferrier; Thomas Hümmer; Philippe Goldner; David Hunger; Hugues de Riedmatten; Hugues de Riedmatten
Published in: Nature Communications, Issue 12, 2021, Page(s) 3570, ISSN 2041-1723
Publisher: Nature Publishing Group
DOI: 10.1038/s41467-021-23632-9

Lasing in the superradiant crossover regime

Author(s): Kamanasish Debnath, Yuan Zhang, and Klaus Mølmer
Published in: Physical Review A, Issue 98 / 6, 2018, Page(s) 063837, ISSN 2469-9934
Publisher: American Physical Society
DOI: 10.1103/physreva.98.063837

High-connectivity quantum processor nodes using single-ion qubits in rare-earth-ion-doped crystals

Author(s): Adam Kinos, Lars Rippe, Diana Serrano, Andreas Walther, and Stefan Kröll
Published in: Phys. Rev. A, Issue 105,032603, 2022, ISSN 2469-9934
Publisher: American Physical Society
DOI: 10.1103/physreva.105.032603

Slow light frequency reference cavities—proof of concept for reducing the frequency sensitivity due to length fluctuations

Author(s): Sebastian P Horvath, Chunyan Shi, David Gustavsson, Andreas Walther, Adam Kinos, Stefan Kröll and Lars Rippe
Published in: New J. Phys., Issue 24, 2022, Page(s) 033034, ISSN 1367-2630
Publisher: Institute of Physics Publishing
DOI: 10.1088/1367-2630/ac5932

Optical homogeneous and inhomogeneous linewidths in 171Yb3+:Y2SiO5

Author(s): Lafitte-Houssat, E.
Published in: Оптика и спектроскопия, 2019, ISSN 0030-4034
Publisher: Оптика и спектроскопия
DOI: 10.21883/os.2022.01.51885.29-21

Ultra-narrow optical linewidths in rare-earth molecular crystals

Author(s): Diana Serrano, Senthil Kumar Kuppusamy, Benoît Heinrich, Olaf Fuhr, David Hunger, Mario Ruben, Philippe Goldner
Published in: Nature, Issue 603, 2022, Page(s) 241–246, ISSN 0028-0836
Publisher: Nature Publishing Group
DOI: 10.1038/s41586-021-04316-2