A5040151260- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Quantum Mechanics and Applications
- Quantum optics and atomic interactions
- Quantum and electron transport phenomena
- Neural Networks and Reservoir Computing
- History and Theory of Mathematics
- Laser-Matter Interactions and Applications
- Quantum many-body systems
- Cold Atom Physics and Bose-Einstein Condensates
- Mathematics and Applications
- History and advancements in chemistry
- Advanced Fiber Laser Technologies
- Atomic and Subatomic Physics Research
- Quantum-Dot Cellular Automata
- Computability, Logic, AI Algorithms
- Advanced Frequency and Time Standards
- Space Science and Extraterrestrial Life
- Physics of Superconductivity and Magnetism
- Mechanical and Optical Resonators
- Analytical Chemistry and Sensors
- Radioactive element chemistry and processing
- Nanocluster Synthesis and Applications
- Low-power high-performance VLSI design
- Quantum chaos and dynamical systems
Honeywell (United States)
2020-2022
National Measurement Institute
2014
The University of Sydney
2013-2014
Joint Quantum Institute
2009-2014
University of Maryland, College Park
2009-2014
National Institute of Standards and Technology
2009-2014
ARC Centre of Excellence for Engineered Quantum Systems
2013-2014
Lockheed Martin (United States)
2014
San Jose State University
2004-2011
University of Michigan–Ann Arbor
2009
Quantum teleportation is the faithful transfer of quantum states between systems, relying on prior establishment entanglement and using only classical communication during transmission. We report information atomic memories separated by about 1 meter. A bit stored in a single trapped ytterbium ion (Yb+) teleported to second Yb+ atom with an average fidelity 90% over replete set states. The protocol based heralded atoms through interference detection photons emitted from each guided optical...
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...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThiol surface complexation on growing cadmium sulfide clustersV. Swayambunathan, David Hayes, Klaus H. Schmidt, Y. X. Liao, and Dan MeiselCite this: J. Am. Chem. Soc. 1990, 112, 10, 3831–3837Publication Date (Print):May 1, 1990Publication History Published online1 May 2002Published inissue 1 1990https://pubs.acs.org/doi/10.1021/ja00166a017https://doi.org/10.1021/ja00166a017research-articleACS PublicationsRequest reuse permissionsArticle...
We demonstrate the use of an optical frequency comb to coherently control and entangle atomic qubits. A train off-resonant ultrafast laser pulses is used efficiently transfer population between electronic vibrational states trapped ions implement entangling quantum logic gate with high fidelity. This technique can be extended field regime where operations performed faster than trap frequency. general approach applied more complex systems, such as large collections interacting atoms or molecules.
We demonstrate single qubit operations on a trapped atom hyperfine using ultrafast pulse from mode-locked laser. shape the laser and perform pi rotation of in less than 50 ps with population transfer exceeding 99% negligible effects spontaneous emission or ac Stark shifts. The gate time is significantly shorter period atomic motion trap (Rabi frequency / > 10000), demonstrating that this interaction takes place deep within strong excitation regime.
We present a suite of ``holographic'' quantum algorithms for efficient ground-state preparation and dynamical evolution correlated spin systems, which require far fewer qubits than the number spins being simulated. The exploit equivalence between matrix-product states (MPS) channels, along with partial measurement qubit reuse, in order to simulate $D$-dimensional system using only $(D\ensuremath{-}1)$-dimensional subset an ancillary register whose size scales logarithmically amount...
The promise of quantum computers hinges on the ability to scale large system sizes, e.g., run computations consisting more than 100 million operations fault-tolerantly. This in turn requires suppressing errors levels inversely proportional size computation. As a step towards this ambitious goal, we present experiments trapped-ion QCCD processor where, through use fault-tolerant encoding and error correction, are able suppress logical rates below physical rates. In particular, entangled...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRadiolytic production and properties of ultrasmall cadmium sulfide particlesDavid Hayes, Olga I. Micic, M. T. Nenadovic, V. Swayambunathan, Dan MeiselCite this: J. Phys. Chem. 1989, 93, 11, 4603–4608Publication Date (Print):June 1, 1989Publication History Published online1 May 2002Published inissue 1 June 1989https://pubs.acs.org/doi/10.1021/j100348a040https://doi.org/10.1021/j100348a040research-articleACS PublicationsRequest reuse...
A nuclear spin can act as a quantum switch that turns on or off ultracold collisions between atoms even when there is neither interaction spins nor the and electron spins. This ``exchange blockade'' new mechanism for implementing logic gates arises from symmetry of composite identical particles, rather than direct coupling qubits. We study implementation entangling $\sqrt{\mathrm{SWAP}}$ gate based this model system two atoms, each with ground electronic configuration $^{1}S_{0}$, $1/2$...
We demonstrate a simple pulse shaping technique designed to improve the fidelity of spin-dependent force operations commonly used implement entangling gates in trapped-ion systems. This extension M{\o}lmer-S{\o}rensen gate can theoretically suppress effects certain frequency and timing errors any desired order is demonstrated through Walsh modulation two-qubit on trapped atomic ions. The applicable system qubits coupled collective harmonic oscillator modes.
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...
The quantum volume test is a full-system benchmark for computers that sensitive to qubit number, fidelity, connectivity, and other quantities believed be important in building useful devices. was designed produce single-number measure of computer's general capability, but complete understanding its limitations operational meaning still missing. We explore the better understand design aspects, sensitivity errors, passing criteria, what implies about computer. elucidate some transient...
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...
The ability to selectively measure, initialize, and reuse qubits during a quantum circuit enables mapping of the spatial structure certain tensor-network states onto dynamics circuits, thereby achieving dramatic resource savings when simulating systems with limited entanglement. We experimentally demonstrate significant benefit this approach simulation: entanglement an infinite system-specifically half-chain spectrum-is conveniently encoded within small register "bond qubits" can be...
We demonstrate a probabilistic entangling quantum gate between two distant trapped ytterbium ions. The is implemented the hyperfine ``clock'' state atomic qubits and mediated by interference of emitted photons carrying frequency encoded qubits. Heralded coincidence detection these photons, has an average output fidelity $89\ifmmode\pm\else\textpm\fi{}2%$. This together with single qubit operations sufficient to generate large entangled cluster states for scalable computing.
Midcircuit measurement and reset are crucial primitives in quantum computation, but such operations require strong interactions with selected qubits while maintaining isolation of neighboring qubits, which is a significant challenge many systems. For trapped ion systems, performed laser-induced fluorescence. Stray light from the detection beam fluorescence measured ions can be sources decoherence for unmeasured qubits. We present technique using micromotion to reduce these by over an order...
We present a precise measurement of the lifetime $6p\text{ }{^{2}P}_{1/2}^{o}$ excited state single trapped ytterbium ion $({\text{Yb}}^{+})$. A time-correlated single-photon counting technique is used, where ultrafast pulses excite and emitted photons are coupled into single-mode optical fiber. By performing on atom with fast excitation excellent spatial filtering, we able to eliminate common systematics. The measured be $8.12\ifmmode\pm\else\textpm\fi{}0.02\text{ }\text{ns}$, in good...