Dr Christopher Ballance: Publications

High-Fidelity Preparation, Gates, Memory, and Readout of a Trapped-Ion Quantum Bit

Physical Review Letters American Physical Society (APS) 113:22 (2014) 220501

Authors:

TP Harty, DTC Allcock, CJ Ballance, L Guidoni, HA Janacek, NM Linke, DN Stacey, DM Lucas

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High-fidelity two-qubit quantum logic gates using trapped calcium-43 ions

(2014)

Authors:

CJ Ballance, TP Harty, NM Linke, DM Lucas

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High-fidelity preparation, gates, memory and readout of a trapped-ion quantum bit

(2014)

Authors:

TP Harty, DTC Allcock, CJ Ballance, L Guidoni, HA Janacek, NM Linke, DN Stacey, DM Lucas

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Microwave control electrodes for scalable, parallel, single-qubit operations in a surface-electrode ion trap

Applied Physics B Springer Nature 114:1-2 (2014) 3-10

Authors:

DPL Aude Craik, NM Linke, TP Harty, CJ Ballance, DM Lucas, AM Steane, DTC Allcock

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Injection locking of two frequency-doubled lasers with 3.2 GHz offset for driving Raman transitions with low photon scattering in ⁴³Ca+

Optics Letters 38:23 (2013) 5087-5089

Authors:

NM Linke, CJ Ballance, DM Lucas

Abstract:

We describe the injection locking of two infrared (794 nm) laser diodes that are each part of a frequency-doubled laser system. An acousto-optic modulator in the injection path gives an offset of 1.6 GHz between the lasers for driving Raman transitions between states in the hyperfine split (by 3.2 GHz) ground level of 43Ca+. The offset can be disabled for use in 40Ca+. We measure the relative linewidth of the frequency-doubled beams to be 42 mHz in an optical heterodyne measurement. The use of both injection locking and frequency doubling combines spectral purity with high optical power. Our scheme is applicable for providing Raman beams across other ion species and neutral atoms where coherent optical manipulation is required. © 2013 Optical Society of America.

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Dr Christopher Ballance

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High-Fidelity Preparation, Gates, Memory, and Readout of a Trapped-Ion Quantum Bit

Authors:

High-fidelity two-qubit quantum logic gates using trapped calcium-43 ions

Authors:

High-fidelity preparation, gates, memory and readout of a trapped-ion quantum bit

Authors:

Microwave control electrodes for scalable, parallel, single-qubit operations in a surface-electrode ion trap

Authors:

Injection locking of two frequency-doubled lasers with 3.2 GHz offset for driving Raman transitions with low photon scattering in ⁴³Ca+

Authors:

Abstract:

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Dr Christopher Ballance

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High-Fidelity Preparation, Gates, Memory, and Readout of a Trapped-Ion Quantum Bit

Authors:

High-fidelity two-qubit quantum logic gates using trapped calcium-43 ions

Authors:

High-fidelity preparation, gates, memory and readout of a trapped-ion quantum bit

Authors:

Microwave control electrodes for scalable, parallel, single-qubit operations in a surface-electrode ion trap

Authors:

Injection locking of two frequency-doubled lasers with 3.2 GHz offset for driving Raman transitions with low photon scattering in 43Ca+

Authors:

Abstract:

Injection locking of two frequency-doubled lasers with 3.2 GHz offset for driving Raman transitions with low photon scattering in ⁴³Ca+