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Advanced quantum computing with trapped ions

Deliverables

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).

Establish techniques for automated optimisation/discovery of shallow circuits; verify numerically and begin testing with quantum hardware

Establish techniques for automated optimisation/discovery of shallow circuits; verify numerically and begin testing with quantum hardware

Identify scalable discrete noise models

Identify scalable discrete noise models

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Publications

Cross-verification of independent quantum devices

Author(s): 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
Published in: 2019

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

Author(s): Bálint Koczor, Frederik vom Ende, Maurice de Gosson, Steffen J. Glaser, Robert Zeier
Published in: 2018

Quantum natural gradient generalised to non-unitary circuits

Author(s): Bálint Koczor, Simon C. Benjamin
Published in: 2019

Deterministic correction of qubit loss

Author(s): Roman Stricker, Davide Vodola, Alexander Erhard, Lukas Postler, Michael Meth, Martin Ringbauer, Philipp Schindler, Thomas Monz, Markus Müller, Rainer Blatt
Published in: 2020

Variational-State Quantum Metrology

Author(s): Bálint Koczor, Suguru Endo, Tyson Jones, Yuichiro Matsuzaki, Simon C. Benjamin
Published in: 2019

Shuttling-based trapped-ion quantum information processing

Author(s): V. Kaushal, B. Lekitsch, A. Stahl, J. Hilder, D. Pijn, C. Schmiegelow, A. Bermudez, M. Müller, F. Schmidt-Kaler, U. Poschinger
Published in: AVS Quantum Science, Issue 2/1, 2020, Page(s) 014101, ISSN 2639-0213
DOI: 10.1116/1.5126186

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

Author(s): 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
Published in: Physical Review Letters, Issue 123/11, 2019, ISSN 0031-9007
DOI: 10.1103/physrevlett.123.110503

Encoding a qubit in a trapped-ion mechanical oscillator

Author(s): C. Flühmann, T. L. Nguyen, M. Marinelli, V. Negnevitsky, K. Mehta, J. P. Home
Published in: Nature, Issue 566/7745, 2019, Page(s) 513-517, ISSN 0028-0836
DOI: 10.1038/s41586-019-0960-6

Characterizing large-scale quantum computers via cycle benchmarking

Author(s): Alexander Erhard, Joel J. Wallman, Lukas Postler, Michael Meth, Roman Stricker, Esteban A. Martinez, Philipp Schindler, Thomas Monz, Joseph Emerson, Rainer Blatt
Published in: Nature Communications, Issue 10/1, 2019, ISSN 2041-1723
DOI: 10.1038/s41467-019-13068-7

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

Author(s): Bálint Koczor, Robert Zeier, Steffen J. Glaser
Published in: Physical Review A, Issue 101/2, 2020, ISSN 2469-9926
DOI: 10.1103/physreva.101.022318

Adaptive Bayesian phase estimation for quantum error correcting codes

Author(s): F Martínez-García, D Vodola, M Müller
Published in: New Journal of Physics, Issue 21/12, 2019, Page(s) 123027, ISSN 1367-2630
DOI: 10.1088/1367-2630/ab5c51

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

Author(s): 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
Published in: Physical Review Letters, Issue 124/11, 2020, ISSN 0031-9007
DOI: 10.1103/physrevlett.124.110501

Segmented ion-trap fabrication using high precision stacked wafers

Author(s): Simon Ragg, Chiara Decaroli, Thomas Lutz, Jonathan P. Home
Published in: Review of Scientific Instruments, Issue 90/10, 2019, Page(s) 103203, ISSN 0034-6748
DOI: 10.1063/1.5119785

Magnetic field stabilization system for atomic physics experiments

Author(s): B. Merkel, K. Thirumalai, J. E. Tarlton, V. M. Schäfer, C. J. Ballance, T. P. Harty, D. M. Lucas
Published in: Review of Scientific Instruments, Issue 90/4, 2019, Page(s) 044702, ISSN 0034-6748
DOI: 10.1063/1.5080093

A shuttling-based trapped-ion quantum processing node

Author(s): Vidyut Kaushal
Published in: 2019

Advanced positioning control for trapped ions

Author(s): Oliver Gräb
Published in: 2019

Simultaneous and individual ion addressing for quantum information processing

Author(s): Julian Rickert
Published in: 2018