Materials challenges for trapped-ion quantum computers

KR Brown, J Chiaverini, JM Sage… - Nature Reviews Materials, 2021 - nature.com
Trapped-ion quantum information processors store information in atomic ions maintained in
position in free space by electric fields. Quantum logic is enacted through manipulation of …

Direct observation of geometric-phase interference in dynamics around a conical intersection

CH Valahu, VC Olaya-Agudelo, RJ MacDonell… - Nature Chemistry, 2023 - nature.com
Conical intersections are ubiquitous in chemistry and physics, often governing processes
such as light harvesting, vision, photocatalysis and chemical reactivity. They act as funnels …

Microwaves in quantum computing

JC Bardin, DH Slichter, DJ Reilly - IEEE journal of microwaves, 2021 - ieeexplore.ieee.org
Quantum information processing systems rely on a broad range of microwave technologies
and have spurred development of microwave devices and methods in new operating …

Crosstalk suppression in individually addressed two-qubit gates in a trapped-ion quantum computer

C Fang, Y Wang, S Huang, KR Brown, J Kim - Physical Review Letters, 2022 - APS
Crosstalk between target and neighboring spectator qubits due to spillover of control signals
represents a major error source limiting the fidelity of two-qubit entangling gates in quantum …

[HTML][HTML] Active stabilization of ion trap radiofrequency potentials

KG Johnson, JD Wong-Campos, A Restelli… - Review of Scientific …, 2016 - pubs.aip.org
We actively stabilize the harmonic oscillation frequency of a laser-cooled atomic ion
confined in a radiofrequency (rf) Paul trap by sampling and rectifying the high voltage rf …

Time-dependent Hamiltonian simulation of highly oscillatory dynamics and superconvergence for Schrödinger equation

D An, D Fang, L Lin - Quantum, 2022 - quantum-journal.org
We propose a simple quantum algorithm for simulating highly oscillatory quantum dynamics,
which does not require complicated quantum control logic for handling time-ordering …

Demonstration of two-atom entanglement with ultrafast optical pulses

JD Wong-Campos, SA Moses, KG Johnson… - Physical Review Letters, 2017 - APS
We demonstrate quantum entanglement of two trapped atomic ion qubits using a sequence
of ultrafast laser pulses. Unlike previous demonstrations of entanglement mediated by the …

Geometric control of collective spontaneous emission

Y He, L Ji, Y Wang, L Qiu, J Zhao, Y Ma, X Huang… - Physical Review Letters, 2020 - APS
Dipole spin-wave states of atomic ensembles with wave vector k (ω) mismatched from the
dispersion relation of light are difficult to access by far-field excitation but may support rich …

Spin-photon entanglement with direct photon emission in the telecom C-band

P Laccotripes, T Müller, RM Stevenson… - Nature …, 2024 - nature.com
Quantum networks, relying on the distribution of quantum entanglement between remote
locations, have the potential to transform quantum computation and secure long-distance …

Frequency comb up- and down-conversion in synchronously driven χ(2) optical microresonators

SJ Herr, V Brasch, J Szabados, E Obrzud, Y Jia… - Optics letters, 2018 - opg.optica.org
Optical frequency combs are key to optical precision measurements. While most frequency
combs operate in the near-infrared (NIR) regime, many applications require combs at mid …