Polarization-insensitive state preparation for trapped-ion hyperfine qubits
Physical Review A 110:4 (2024) l040402
Generating arbitrary superpositions of nonclassical quantum harmonic oscillator states
(2024)
In situ characterization of qubit-drive phase distortions
Physical Review Applied American Physical Society (APS) 22:2 (2024) 24001
Abstract:
<jats:p>Reducing errors in quantum gates is critical to the development of quantum computers. To do so, any distortions in the control signals should be identified; however, conventional tools are not always applicable when part of the system is under high vacuum, cryogenic, or microscopic. Here, we demonstrate a method to detect and compensate for amplitude-dependent phase changes, using the qubit itself as a probe. The technique is implemented using a microwave-driven trapped-ion qubit, where correcting phase distortions leads to a threefold improvement in the error of single-qubit gates implemented with pulses of different amplitudes, to attain state-of-the-art performance benchmarked at <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><a:mn>1.6</a:mn><a:mo stretchy="false">(</a:mo><a:mn>4</a:mn><a:mo stretchy="false">)</a:mo><a:mo>×</a:mo><a:msup><a:mn>10</a:mn><a:mrow><a:mo>−</a:mo><a:mn>6</a:mn></a:mrow></a:msup></a:math> error per Clifford gate.</jats:p> <jats:sec> <jats:title/> <jats:supplementary-material> <jats:permissions> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2024</jats:copyright-year> </jats:permissions> </jats:supplementary-material> </jats:sec>Individually Addressed Quantum Gate Interactions Using Dynamical Decoupling
PRX Quantum American Physical Society (APS) 5:3 (2024) 030321
Robust and fast microwave-driven quantum logic for trapped-ion qubits
Physical Review A American Physical Society (APS) 110:1 (2024) l010601