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Atomic and Laser Physics
Credit: Jack Hobhouse

Dr Christopher Ballance

Future Leaders Fellow

Research theme

  • Quantum information and computation

Sub department

  • Atomic and Laser Physics

Research groups

  • Ion trap quantum computing
chris.ballance@physics.ox.ac.uk
Telephone: 01865 (2)72122
Clarendon Laboratory, room 512.40.23
  • About
  • Publications

Synthesizing a Sigma circumflex accent z spin-dependent force for optical, metastable, and ground-state trapped-ion qubits

Physical Review A American Physical Society 107:2 (2023) 22617

Authors:

Oana Bazavan, Sebastian Saner, M Minder, Ac Hughes, Rt Sutherland, Dm Lucas, R Srinivas, Cj Ballance

Abstract:

A single bichromatic field near resonant to a qubit transition is typically used for σx or σy Mølmer-Sørensen-type interactions in trapped-ion systems. Using this field configuration, it is also possible to synthesize a σz spin-dependent force by merely adjusting the beat-note frequency. Here, we expand on previous work and present a comprehensive theoretical and experimental investigation of this scheme with a laser near resonant to a quadrupole transition in Sr+88. Further, we characterize its robustness to optical phase and qubit frequency offsets, and demonstrate its versatility by entangling optical, metastable, and ground-state qubits.
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Sinara and ARTIQ: Open-Source Ion-Trapping Control System

Institute of Electrical and Electronics Engineers (IEEE) 02 (2023) 294-295

Authors:

Tomasz Przywózki, Paweł Kulik, Mikołaj Sowiński, Grzegorz Kasprowicz, David TC Allcock, Christopher Ballance, Sébastien Bourdeauducq, JW Britton, Thomas Harty, Robert Jördens, Marcin Kiepiela, Norman Krackow, David Nadlinger, Daniel Slichter, Filip Świtakowski, Marius Weber
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A quantum network of two entangled optical atomic clocks

SPIE, the international society for optics and photonics (2023) 1

Authors:

Raghavendra Srinivas, Bethan C Nichol, David P Nadlinger, Peter Drmota, Dougal Main, Gabriel Araneda, Christopher J Ballance, David M Lucas
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Data for "Cryogenic ion trap system for high-fidelity near-field microwave-driven quantum logic"

University of Oxford (2023)

Authors:

Marius Weber, Clemens Löschnauer, Jochen Werner, Mario Gely, Ryan Hanley, Joseph Goodwin, Christopher Ballance, Tom Harty, David Lucas

Abstract:

Datasets used to generate the figures of "Cryogenic ion trap system for high-fidelity near-field microwave-driven quantum logic", accepted for publication in "Quantum Science and Technology"
Details from ORA

Coherent Control of Trapped Ion Qubits with Localized Electric Fields

(2022)

Authors:

R Srinivas, CM Löschnauer, M Malinowski, AC Hughes, R Nourshargh, V Negnevitsky, DTC Allcock, SA King, C Matthiesen, TP Harty, CJ Ballance
More details from the publisher

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