61 citations · 357 across the 12 of their papers we have counts for
12 papers
Helios: A 98-qubit trapped-ion quantum computer
Anthony Ransford, M. S. Allman, Jake Arkinstall +183
We report on Quantinuum Helios, a 98-qubit trapped-ion quantum processor based on the quantum charge-coupled device (QCCD) architecture. Helios features Ba hyperfine…
Order-of-magnitude extension of qubit lifetimes with a decoherence-free subspace quantum error correction code
Shival Dasu, Ben Criger, Cameron Foltz +9
Constructing an efficient and robust quantum memory is central to the challenge of engineering feasible quantum computer architectures. Quantum error correction codes can solve thi…
Scalable Multispecies Ion Transport in a Grid-Based Surface-Electrode Trap
Robert D. Delaney, Lucas R. Sletten, Matthew J. Cich +13
Quantum processors based on linear arrays of trapped ions have achieved exceptional performance, but scaling to large qubit numbers requires realizing two-dimensional ion arrays as…
Implementing Fault-tolerant Entangling Gates on the Five-qubit Code and the Color Code
C. Ryan-Anderson, N. C. Brown, M. S. Allman +34
We compare two different implementations of fault-tolerant entangling gates on logical qubits. In one instance, a twelve-qubit trapped-ion quantum computer is used to implement a n…
High fidelity state preparation and measurement of ion hyperfine qubits with I > 1/2
Fangzhao Alex An, Anthony Ransford, Andrew Schaffer +4
We present a method for achieving high fidelity state preparation and measurement (SPAM) using trapped ion hyperfine qubits with nuclear spins higher than . The ground sta…
A high fidelity light-shift gate for clock-state qubits
C. H. Baldwin, B. J. Bjork, M. Foss-Feig +7
To date, the highest fidelity quantum logic gates between two qubits have been achieved with variations on the geometric-phase gate in trapped ions, with the two leading variants b…
Modulating carrier and sideband coupling strengths in a standing wave gate beam
Thomas E. deLaubenfels, Karl A. Burkhardt, Grahame Vittorini +3
We control the relative coupling strength of carrier and first order motional sideband interactions of a trapped ion by placing it in a resonant optical standing wave. Our configur…
Entanglement of distinguishable quantum memories
G. Vittorini, D. Hucul, I. V. Inlek +2
Time-resolved photon detection can be used to generate entanglement between distinguishable photons. This technique can be extended to entangle quantum memories that emit photons w…
Quantum Gates with Phase Stability over Space and Time
I. V. Inlek, G. Vittorini, D. Hucul +2
The performance of a quantum information processor depends on the precise control of phases introduced into the system during quantum gate operations. As the number of operations i…
Heating and ion transport in a Y-junction surface-electrode trap
G. Shu, G. Vittorini, C. Volin +4
We measure ion heating following transport throughout a Y-junction surface-electrode ion trap. By carefully selecting the trap voltage update rate during adiabatic transport along…
Transformed Composite Sequences for Improved Qubit Addressing
J. True Merrill, S. Charles Doret, Grahame D. Vittorini +2
Selective laser addressing of a single atom or atomic ion qubit can be improved using narrowband composite pulse sequences. We describe a Lie-algebraic technique to generalize know…
Modular cryostat for ion trapping with surface-electrode ion traps
Grahame Vittorini, Kenneth Wright, Kenneth R. Brown +2
We present a simple cryostat purpose built for use with surface-electrode ion traps, designed around an affordable, large cooling power commercial pulse tube refrigerator. A modula…