A5032403543- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Neural Networks and Reservoir Computing
- Quantum optics and atomic interactions
- Quantum and electron transport phenomena
- Quantum many-body systems
- Electron and X-Ray Spectroscopy Techniques
- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Molecular Physics
- Atomic and Subatomic Physics Research
- Force Microscopy Techniques and Applications
- Integrated Circuits and Semiconductor Failure Analysis
- Mass Spectrometry Techniques and Applications
- Analytical Chemistry and Sensors
- Advanced Frequency and Time Standards
- Advanced Materials Characterization Techniques
- Scientific Measurement and Uncertainty Evaluation
- Laser Design and Applications
- Electrochemical Analysis and Applications
- Topological Materials and Phenomena
- Spectroscopy and Laser Applications
- Quantum Mechanics and Applications
- Astro and Planetary Science
- Non-Destructive Testing Techniques
- Particle Accelerators and Free-Electron Lasers
Honeywell (United States)
2020-2022
University of Colorado Boulder
2011-2012
National Institute of Standards and Technology
2011-2012
Paul Scherrer Institute
2011
United States Air Force Research Laboratory
2004
Correcting errors in real time is essential for reliable large-scale quantum computations. Realizing this high-level function requires a system capable of several low-level primitives, including single-qubit and two-qubit operations, midcircuit measurements subsets qubits, real-time processing measurement outcomes, the ability to condition subsequent gate operations on those measurements. In work, we use 10-qubit charge-coupled device trapped-ion computer encode single logical qubit using...
We describe and benchmark a new quantum charge-coupled device (QCCD) trapped-ion computer based on linear trap with periodic boundary conditions, which resembles race track. The system successfully incorporates several technologies crucial to future scalability—including electrode broadcasting, multilayer rf routing, magneto-optical (MOT) loading—while maintaining, in some cases exceeding, the gate fidelities of previous QCCD systems. is initially operated 32 qubits, but upgrades will allow...
Calculating the equilibrium properties of condensed-matter systems is one promising applications near-term quantum computing. Recently, hybrid quantum-classical time-series algorithms have been proposed to efficiently extract these from a measurement Loschmidt amplitude <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><a:mo fence="false" stretchy="false">⟨</a:mo><a:mi>ψ</a:mi><a:mrow><a:mo...
Correcting errors in real-time is essential for reliable large-scale quantum computations. Realizing this high-level function requires a system capable of several low-level primitives, including single-qubit and two-qubit operations, mid-circuit measurements subsets qubits, processing measurement outcomes, the ability to condition subsequent gate operations on those measurements. In work, we use ten qubit QCCD (quantum charge-coupled device) trapped-ion computer encode single logical using...
We describe and benchmark a new quantum charge-coupled device (QCCD) trapped-ion computer based on linear trap with periodic boundary conditions, which resembles race track. The system successfully incorporates several technologies crucial to future scalability, including electrode broadcasting, multi-layer RF routing, magneto-optical (MOT) loading, while maintaining, in some cases exceeding, the gate fidelities of previous QCCD systems. is initially operated 32 qubits, but upgrades will...
Quantum state teleportation is commonly used in designs for large-scale quantum computers. Using Quantinuum's H2 trapped-ion processor, we demonstrate fault-tolerant circuits a error correction code-specifically the Steane code. The use up to 30 qubits at physical level and employ real-time correction. We conducted experiments on several variations of logical using both transversal gates lattice surgery. measured process fidelity be 0.975 ± 0.002 implementation 0.851 0.009 surgery as well...
Non-Abelian topological order (TO) is a coveted state of matter with remarkable properties, including quasiparticles that can remember the sequence in which they are exchanged. These anyonic excitations promising building blocks fault-tolerant quantum computers. However, despite extensive efforts, non-Abelian TO and its have remained elusive, unlike simpler or defects Abelian TO. In this work, we present first unambiguous realization demonstrate control anyons. Using an adaptive circuit on...
Population leakage outside the qubit subspace presents a particularly harmful source of error that cannot be handled by standard correction methods. Using trapped $^{171}$Yb$+$ ion, we demonstrate an optical pumping scheme to suppress errors in atomic hyperfine qubits. The selection rules and narrow linewidth quadrupole transition are used selectively pump population out states back into subspace. Each cycle reduces factor $\sim3$, allowing for exponential suppression number cycles. We use...
Empirical evidence for a gap between the computational powers of classical and quantum computers has been provided by experiments that sample output distributions two-dimensional circuits. Many attempts to close this have utilized simulations based on tensor network techniques, their limitations shed light improvements hardware required frustrate simulability. In particular, having in excess $\sim 50$ qubits are primarily vulnerable simulation due restrictions gate fidelity connectivity,...
Experimental results describing pulsed lasers operating near 3.9 μm on the Ho<sup>3+ </sup>(<sup>5</sup>I<sub>5</sub>-<sup>5</sup>I<sub>6</sub>) transition in highly-doped (> 10 at. %) barium yttrium fluoride (BaY<sub>2</sub>F<sub>8</sub> or BYF) will be presented. The <sup>5</sup>I<sub>5</sub> manifolds Ho:BYF were pumped using a flashlamp excited, free-running Cr:LiSAF laser tuned to Ho<sup>3+</sup> absorption peak 889nm. concentrations of 10%, 20%, 30% and 40% BYF lased simple...
Using a trapped ion quantum computer, we experimentally demonstrate tensor-network-based algorithm that simulates the dynamics of infinite-size sys-tems by re-using qubits in middle calculation.
At transitions between phases of matter, physical systems can exhibit universal behavior independent their microscopic details. Probing such in quantum many-body is a challenging and practically important problem that be solved by computers, potentially exponentially faster than classical computers. In this work, we use the Quantinuum H1-1 computer to realize extension simple disease spreading process known non-equilibrium phase transition an active absorbing state. Using techniques as...
In this work we present the design, construction and measurements of magnet for a so-called spin-rotator (Wien filter), beam line device used to rotate spin direction (and associated magnetic moment) muons in condensed matter research at Swiss Muon Source Paul Scherrer Institute. The design parameters-originating both from properties preferred particle as well technological constraints high-voltage components generating necessary electric field-were optimized compactness, cost high transmission.
We implement logically encoded three-qubit circuits for the quantum Fourier transform (QFT), using [[7,1,3]] Steane code, and benchmark on Quantinuum H2-1 trapped-ion computer. The require multiple logical two-qubit gates, which are implemented transversally, as well non-Clifford single-qubit rotations, performed by non-fault-tolerant state preparation followed a teleportation gadget. First, we individual components randomized benchmarking gate, Ramsey-type experiment $T$ gate. then full QFT...
Quantum state teleportation is commonly used in designs for large-scale fault-tolerant quantum computers. Using Quantinuum's H2 trapped-ion processor, we implement the first demonstration of a circuit error correction code - particular, planar topological [[7,1,3]] color code, or Steane code. The circuits use up to 30 trapped ions at physical layer qubits and employ real-time decoding mid-circuit measurement syndromes implementing corrections during protocol. We conduct experiments on...
Calculating the equilibrium properties of condensed matter systems is one promising applications near-term quantum computing. Recently, hybrid quantum-classical time-series algorithms have been proposed to efficiently extract these from a measurement Loschmidt amplitude $\langle \psi| e^{-i \hat H t}|\psi \rangle$ initial states $|\psi\rangle$ and time evolution under Hamiltonian $\hat H$ up short times $t$. In this work, we study operation algorithm on present-day computer. Specifically,...