A5087684242- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Advanced Frequency and Time Standards
- Quantum and electron transport phenomena
- Quantum, superfluid, helium dynamics
- Quantum Mechanics and Applications
- Neural Networks and Applications
- Numerical Methods and Algorithms
- Radioactive contamination and transfer
- Advanced MEMS and NEMS Technologies
- Laser Design and Applications
- Quantum optics and atomic interactions
- Atomic and Molecular Physics
- Acoustic Wave Resonator Technologies
- Quantum Chromodynamics and Particle Interactions
- Advanced NMR Techniques and Applications
- Extremum Seeking Control Systems
- Rare-earth and actinide compounds
- Catalysis and Oxidation Reactions
- Semiconductor Lasers and Optical Devices
- Radioactive element chemistry and processing
- Microfluidic and Bio-sensing Technologies
- Microfluidic and Capillary Electrophoresis Applications
IonQ (United States)
2019-2023
National Institute of Standards and Technology
2015-2019
University of Maryland, College Park
2015-2019
Joint Quantum Institute
2015-2019
Harvey Mudd College
2011
Abstract Quantum computing leverages the quantum resources of superposition and entanglement to efficiently solve computational problems considered intractable for classical computers. Examples include calculating molecular nuclear structure, simulating strongly interacting electron systems, modeling aspects material function. While substantial theoretical advances have been made in mapping these algorithms, there remains a large gap between resource requirements solving such capabilities...
The field of quantum computing has grown from concept to demonstration devices over the past 20 years. Universal offers efficiency in approaching problems scientific and commercial interest, such as factoring large numbers, searching databases, simulating intractable models physics, optimizing complex cost functions. Here, we present an 11-qubit fully-connected, programmable computer a trapped ion system composed 13 $^{171}$Yb$^{+}$ ions. We demonstrate average single-qubit gate fidelities...
Modeling joint probability distributions is an important task in a wide variety of fields. One popular technique for this employs family multivariate with uniform marginals called copulas. While the theory modeling via copulas well understood, it gets practically challenging to accurately model real data many variables. In work, we design quantum machine learning algorithms We show that any copula can be naturally mapped multipartite maximally entangled state. A variational ansatz christen...
Abstract Efficiently entangling pairs of qubits is essential to fully harness the power quantum computing. Here, we devise an exact protocol that simultaneously entangles arbitrary on a trapped-ion computer. The requires classical computational resources polynomial in system size, and very little overhead control compared single-pair case. We demonstrate exponential improvement both over current state art. implement software-defined computer, where reconfigure computer architecture demand....
Quantum computing leverages the quantum resources of superposition and entanglement to efficiently solve computational problems considered intractable for classical computers. Examples include calculating molecular nuclear structure, simulating strongly-interacting electron systems, modeling aspects material function. While substantial theoretical advances have been made in mapping these algorithms, there remains a large gap between resource requirements solving such capabilities currently...
Measuring an entangled state of two particles is crucial to many quantum communication protocols. Yet Bell-state distinguishability using a finite apparatus obeying linear evolution and local measurement theoretically limited. We extend known bounds for in one variables the general case entanglement $n$ two-state variables. show that at most ${2}^{n+1}\ensuremath{-}1$ classes out ${4}^{n}$ hyper-Bell states can be distinguished with copy input state. With copies, complete possible. present...
Abstract To achieve scalable quantum computing, improving entangling-gate fidelity and its implementation efficiency are of utmost importance. We present here a linear method to construct provably power-optimal entangling gates on an arbitrary pair qubits trapped-ion computer. This leverages simultaneous modulation amplitude, frequency, phase the beams that illuminate ions and, unlike state art, does not require any search in parameter space. The is extensible, enabling stabilization against...
Trapped ions are a promising candidate for large scale quantum computation. Several systems have been built in both academic and industrial settings to implement modestly-sized algorithms. Efficient cooling of the motional degrees freedom is key requirement high-fidelity operations using trapped ions. Here, we present technique whereby individual used cool modes parallel, reducing time required bring an ion chain its ground state. We demonstrate this experimentally develop model understand...
Amplitude estimation (AE) is a fundamental quantum algorithmic primitive that enables computers to achieve quadratic speedups for large class of statistical problems, including Monte Carlo methods. Recent works have succeeded in somewhat reducing the necessary resources AE by trading off some speedup lower depth circuits, but high quality qubits are still needed demonstrating such algorithms. Here, we report results an experimental demonstration on state-of-the-art trapped ion computer. was...
We present an ultra-low noise, high-voltage driver suited for use with piezoelectric actuators and other low-current applications. The architecture uses a flyback switching regulator to generate up 250V in our current design, output of 1 kV or more possible small modifications. A high slew-rate op-amp suppresses the residual yielding total RMS noise $\approx 100\mu$V (1 Hz--100 kHz). low-voltage ($\pm 10$V), bandwidth signal can be summed unity gain directly onto output, making well-suited...
We present a method for creating quantum degenerate gas of metastable alkaline-earth atoms. This has yet to be achieved due inelastic collisions that limit evaporative cooling in the states. Quantum samples prepared $^{1}S_{0}$ ground state can rapidly transferred either $^{3}P_{2}$ or $^{3}P_{0}$ via coherent 3-photon process. Numerical integration density matrix evolution fine structure bosonic atoms shows transfer efficiencies $\simeq90\%$ with experimentally feasible laser parameters...
Isotope-shift spectroscopy with narrow optical transitions provides a benchmark for atomic structure calculations and has also been proposed as way to constrain theories predicting physics beyond the standard model. Here we measure frequency shifts of
We report on a technique to improve the continuous loading of atomic strontium into magnetic trap from Magneto-Optical Trap (MOT). This is achieved by adding depumping laser tuned 3P1 3S1 (688-nm) transition. The increases atom number in and subsequent cooling stages up 65 % for bosonic isotopes 30 fermionic isotope strontium. optimize this strategy with respect 688-nm detuning, intensity, beam size. To understand results, we develop one-dimensional rate equation model system, which good...
We derive a general Hamiltonian that governs the interaction between an $N$-ion chain and externally controlled laser field, where ion motion is quantized field considered beyond plane-wave approximation. This form not only explicitly includes terms are used to drive ion-ion entanglement, but also series of unwanted can lead quantum gate infidelity. demonstrate power our expressivity by singling out effect axial mode heating confirm this experimentally. discuss pathways forward in furthering...
Using new experimental measurements of photoassociation resonances near the $^1\mathrm{S}_0 \rightarrow \phantom{ }^3\mathrm{P}_1$ intercombination transition in $^{84}$Sr and $^{86}$Sr, we present an updated study into mass-scaling behavior bosonic strontium dimers. A previous model [Borkowski et al., Phys. Rev. 90, 032713 (2014)] was able to incorporate a large number for $^{88}$Sr, but at time only handful close dissociation limit were known $^{86}$Sr. In this work, perform more thorough...
Amplitude estimation is a fundamental quantum algorithmic primitive that enables computers to achieve quadratic speedups for large class of statistical problems, including Monte Carlo methods. The main drawback from the perspective near term hardware implementations amplitude algorithm requires very deep circuits. Recent works have succeeded in somewhat reducing necessary resources such algorithms, by trading off some speedup lower depth circuits, but high quality qubits are still needed...
We present a design for radio-frequency driver that leverages telecom amplifiers to achieve high power output and wide bandwidth. The consists of two compact printed circuit boards (total area $< 255$ cm), which incorporate (turn-on) thermal management prevent accidental damage the amplifier circuitry. Our provides $>1$ W over $10$ MHz $1.1$ GHz frequency range, $\geq 5$ from $20$ $100$ MHz. includes auxiliary components analog amplitude modulation ($\approx 70$ kHz bandwidth), as well...