Fast, high-fidelity addressed single-qubit gates using efficient composite pulse sequences
We use electronic microwave control methods to implement addressed single-qubit gates
with high speed and fidelity, for Ca+ 43 hyperfine “atomic clock” qubits in a cryogenic (100 …
with high speed and fidelity, for Ca+ 43 hyperfine “atomic clock” qubits in a cryogenic (100 …
How to Wire a -Qubit Trapped-Ion Quantum Computer
One of the most formidable challenges of scaling up quantum computers is that of control-
signal delivery. Today's small-scale quantum computers typically connect each qubit to one …
signal delivery. Today's small-scale quantum computers typically connect each qubit to one …
Robust and fast microwave-driven quantum logic for trapped-ion qubits
Microwave-driven logic is a promising alternative to laser control in scaling trapped-ion
based quantum processors. We implement Mølmer-Sørensen two-qubit gates on 43 Ca+ …
based quantum processors. We implement Mølmer-Sørensen two-qubit gates on 43 Ca+ …
Individually Addressed Quantum Gate Interactions Using Dynamical Decoupling
A leading approach to implementing small-scale quantum computers has been to use laser
beams, focused to micron spot sizes, to address and entangle trapped ions in a linear …
beams, focused to micron spot sizes, to address and entangle trapped ions in a linear …
Single-qubit gates with errors at the level
We report the achievement of single-qubit gates with sub-part-per-million error rates, in a
trapped-ion $^{43} $ Ca $^{+} $ hyperfine clock qubit. We explore the speed/fidelity trade-off …
trapped-ion $^{43} $ Ca $^{+} $ hyperfine clock qubit. We explore the speed/fidelity trade-off …
Homodyne quadrature laser interferometry for the characterization of low-frequency residual vibrational noise in cryogenic trapped-ion systems
Q Qin, B Ou, W Wu, Y **e, T Chen, C Wu, P Chen - Optics Express, 2024 - opg.optica.org
Cryogenic trapped-ion systems (CTISs) have emerged as indispensable platforms for the
advancement of quantum computation and precision measurement techniques. However …
advancement of quantum computation and precision measurement techniques. However …
Superconducting surface trap chips for microwave-driven trapped ions
Y Tsuchimoto, I Nakamura, S Shirai… - EPJ Quantum …, 2024 - epjqt.epj.org
Microwave-driven trapped ion logic gates offer a promising avenue for advancing beyond
laser-based logic operations. In future microwave-based operations, however, the joule heat …
laser-based logic operations. In future microwave-based operations, however, the joule heat …
Measurement-Induced Heating of Trapped Ions
We experimentally study the heating of trapped atomic ions during measurement of their
internal qubit states. During measurement, ions are projected into one of two basis states …
internal qubit states. During measurement, ions are projected into one of two basis states …
A 3-dimensional scanning trapped-ion probe
Single-atom quantum sensors offer high spatial resolution and high sensitivity to electric and
magnetic fields. Among them, trapped ions offer exceptional performance in sensing electric …
magnetic fields. Among them, trapped ions offer exceptional performance in sensing electric …
Surface-electrode ion trap design for near-field microwave quantum gates
We present a design study into an ion trap electrode geometry for applying near-field
microwave two-qubit gates. This design features an 'S'-shaped meander electrode to …
microwave two-qubit gates. This design features an 'S'-shaped meander electrode to …