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Advanced quantum computing with trapped ions

Livrables

Develop low-resource trapped-ion schemes for fault-tolerant key building blocks

Develop low-resource trapped-ion schemes for fault-tolerant key building blocks (flag-based QEC, FT teleportation and distillation between 2 processing units, comparative study of shuttling- and photon-based interconnects).

Demonstrate quantum optimization or machine learning algorithm for > 30 qubits

Demonstrate quantum optimization or machine learning algorithm for 30 qubits

Demonstrate advanced entanglement purification techniques by purifying a higher order object than a Bell state

Demonstrate advanced entanglement purification techniques by purifying a higher order object than a Bell state an appropriate small code state

Establish techniques for automated optimisation/discovery of shallow circuits; verify numerically and begin testing with quantum hardware
Parallel ion reconfiguration operations on a 50 qubit register
Demonstrate combined LGT ground state generation and dynamics simulation > 30 qubits

Demonstrate combined LGT ground state generation and dynamics simulation 30 qubits

Describe an efficient decoder for flag-based QEC with larger-distance codes

Describe an efficient decoder for flagbased QEC with largerdistance codes scalability of future trappedion technologies with more than 100 qubits

Entanglement rate between two remote traps > 100 ebits/s

Entanglement rate between two remote traps 100 ebitss

Demonstrate random circuit experiment with > 40 qubits using quantum error mitigation methods

Demonstrate random circuit experiment with 40 qubits using quantum error mitigation methods circuit depth 40

Experimental results on benchmarking of single FT building blocks and verification of quantum advantage
Demonstrate a quantum logic gate on multiple logical qubits
Identify scalable discrete noise models
Develop a set of lattice-surgery-inspired methods for code-switching protocols for a FT universal set of gates

Develop a set of latticesurgeryinspired methods for codeswitching protocols for a FT universal set of gates

Automated operation of the quantum computer demonstrator

Automated operation of the quantum computer demonstrator with 50 qubits

Feasibility study on integration of a fibre-cavity into the trap design

Feasibility study on integration of a fibrecavity into the trap design

Assembly of quantum computer demonstrator with 10 qubits
50-ion 3D trap with 2 junctions manufactured and produced

50ion 3D trap with 2 junctions manufactured and produced

Publications

Cross-verification of independent quantum devices

Auteurs: C. Greganti, T. F. Demarie, M. Ringbauer, J. A. Jones, V. Saggio, I. A. Calafell, L. A. Rozema, A. Erhard, M. Meth, L. Postler, R. Stricker, P. Schindler, R. Blatt, T. Monz, P. Walther, J. F. Fitzsimons
Publié dans: 2019
Éditeur: arXiv Preprint

Phase Spaces, Parity Operators, and the Born-Jordan Distribution

Auteurs: Bálint Koczor, Frederik vom Ende, Maurice de Gosson, Steffen J. Glaser, Robert Zeier
Publié dans: 2018
Éditeur: arXiv preprint

Quantum natural gradient generalised to non-unitary circuits

Auteurs: Bálint Koczor, Simon C. Benjamin
Publié dans: 2019
Éditeur: arXiv preprint

Deterministic correction of qubit loss

Auteurs: Roman Stricker, Davide Vodola, Alexander Erhard, Lukas Postler, Michael Meth, Martin Ringbauer, Philipp Schindler, Thomas Monz, Markus Müller, Rainer Blatt
Publié dans: 2020
Éditeur: arXiv preprint

Variational-State Quantum Metrology

Auteurs: Bálint Koczor, Suguru Endo, Tyson Jones, Yuichiro Matsuzaki, Simon C. Benjamin
Publié dans: 2019
Éditeur: arXiv preprint

Shuttling-based trapped-ion quantum information processing

Auteurs: V. Kaushal, B. Lekitsch, A. Stahl, J. Hilder, D. Pijn, C. Schmiegelow, A. Bermudez, M. Müller, F. Schmidt-Kaler, U. Poschinger
Publié dans: AVS Quantum Science, Numéro 2/1, 2020, Page(s) 014101, ISSN 2639-0213
Éditeur: AIP Publishing
DOI: 10.1116/1.5126186

Probing Qubit Memory Errors at the Part-per-Million Level

Auteurs: M. A. Sepiol, A. C. Hughes, J. E. Tarlton, D. P. Nadlinger, T. G. Ballance, C. J. Ballance, T. P. Harty, A. M. Steane, J. F. Goodwin, D. M. Lucas
Publié dans: Physical Review Letters, Numéro 123/11, 2019, ISSN 0031-9007
Éditeur: American Physical Society
DOI: 10.1103/physrevlett.123.110503

Encoding a qubit in a trapped-ion mechanical oscillator

Auteurs: C. Flühmann, T. L. Nguyen, M. Marinelli, V. Negnevitsky, K. Mehta, J. P. Home
Publié dans: Nature, Numéro 566/7745, 2019, Page(s) 513-517, ISSN 0028-0836
Éditeur: Nature Publishing Group
DOI: 10.1038/s41586-019-0960-6

Characterizing large-scale quantum computers via cycle benchmarking

Auteurs: Alexander Erhard, Joel J. Wallman, Lukas Postler, Michael Meth, Roman Stricker, Esteban A. Martinez, Philipp Schindler, Thomas Monz, Joseph Emerson, Rainer Blatt
Publié dans: Nature Communications, Numéro 10/1, 2019, ISSN 2041-1723
Éditeur: Nature Publishing Group
DOI: 10.1038/s41467-019-13068-7

Continuous phase-space representations for finite-dimensional quantum states and their tomography

Auteurs: Bálint Koczor, Robert Zeier, Steffen J. Glaser
Publié dans: Physical Review A, Numéro 101/2, 2020, ISSN 2469-9926
Éditeur: American Physical Society
DOI: 10.1103/physreva.101.022318

Adaptive Bayesian phase estimation for quantum error correcting codes

Auteurs: F Martínez-García, D Vodola, M Müller
Publié dans: New Journal of Physics, Numéro 21/12, 2019, Page(s) 123027, ISSN 1367-2630
Éditeur: Institute of Physics Publishing
DOI: 10.1088/1367-2630/ab5c51

High-Rate, High-Fidelity Entanglement of Qubits Across an Elementary Quantum Network

Auteurs: L. J. Stephenson, D. P. Nadlinger, B. C. Nichol, S. An, P. Drmota, T. G. Ballance, K. Thirumalai, J. F. Goodwin, D. M. Lucas, C. J. Ballance
Publié dans: Physical Review Letters, Numéro 124/11, 2020, ISSN 0031-9007
Éditeur: American Physical Society
DOI: 10.1103/physrevlett.124.110501

Segmented ion-trap fabrication using high precision stacked wafers

Auteurs: Simon Ragg, Chiara Decaroli, Thomas Lutz, Jonathan P. Home
Publié dans: Review of Scientific Instruments, Numéro 90/10, 2019, Page(s) 103203, ISSN 0034-6748
Éditeur: American Institute of Physics
DOI: 10.1063/1.5119785

Magnetic field stabilization system for atomic physics experiments

Auteurs: B. Merkel, K. Thirumalai, J. E. Tarlton, V. M. Schäfer, C. J. Ballance, T. P. Harty, D. M. Lucas
Publié dans: Review of Scientific Instruments, Numéro 90/4, 2019, Page(s) 044702, ISSN 0034-6748
Éditeur: American Institute of Physics
DOI: 10.1063/1.5080093

A shuttling-based trapped-ion quantum processing node

Auteurs: Vidyut Kaushal
Publié dans: 2019
Éditeur: University of Mainz

Advanced positioning control for trapped ions

Auteurs: Oliver Gräb
Publié dans: 2019
Éditeur: University of Mainz

Simultaneous and individual ion addressing for quantum information processing

Auteurs: Julian Rickert
Publié dans: 2018
Éditeur: University of Innsbruck

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