A5084378207- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Quantum Mechanics and Applications
- Quantum and electron transport phenomena
- Molecular Spectroscopy and Structure
- Solid-state spectroscopy and crystallography
- Methane Hydrates and Related Phenomena
- Greenhouse Technology and Climate Control
- Plant responses to elevated CO2
- Gamma-ray bursts and supernovae
- Smart Parking Systems Research
- Atmospheric Ozone and Climate
- Quantum many-body systems
- Atomic and Subatomic Physics Research
- Quantum optics and atomic interactions
- Optimization and Packing Problems
- Advanced Manufacturing and Logistics Optimization
- Quantum, superfluid, helium dynamics
- Stock Market Forecasting Methods
- Astro and Planetary Science
- Plant Water Relations and Carbon Dynamics
- Spectroscopy and Quantum Chemical Studies
- Stellar, planetary, and galactic studies
University of Maryland, College Park
1991-2024
Joint Quantum Institute
2022-2024
Joint Center for Quantum Information and Computer Science
2022-2024
Atlanta University Center
2017-2018
Emerson (United States)
2017-2018
Emory University
2017-2018
As we approach the era of quantum advantage, when computers (QCs) can outperform any classical computer on particular tasks, there remains difficult challenge how to validate their performance. While algorithmic success be easily verified in some instances such as number factoring or oracular algorithms, these approaches only provide pass/fail information for a single QC. On other hand, comparison between different QCs same arbitrary circuit provides lower-bound generic validation:...
We report an ab initio, full-dimensional, potential energy surface (PES) for CO2—H2O, in which two-body interaction energies are fit using a basis of permutationally invariant polynomials and combined with accurate potentials the non-interacting monomers. This approach we have termed “plug play” is extended here to improve precision 2-body long range. done by combining two separate fits. One 47 593 region strong approaching range, second one 6244 The fits overlap permits smooth switch from...
The electron pair approximation offers an efficient variational quantum eigensolver (VQE) approach for chemistry simulations on computers. With the number of entangling gates scaling quadratically with system size and a constant measurement overhead, orbital optimized unitary coupled cluster double (oo-upCCD) ansatz strikes balance between accuracy efficiency. However, prevents method from achieving quantitative accuracy. To improve it, we explore theory second order perturbation (PT2)...
A portable open gas-exchange system (Li-6400, Li-Cor, Inc., Lincoln, NE, USA) has been widely used for the measurement of net gas exchanges and calibration/parameterization leaf models. Measurement errors due to diffusive leakage rates water vapor (LW) CO2 (LC) between inside outside chamber, inward dark transpiration rate (DW) respiration (DC) released from under gasket, can be significant. Rigorous model-based approaches were developed estimating coefficients (KW) (KC) correcting...
The cyclic HCl-(H2O)3 tetramer is the largest observed neutral HCl-(H2O)n cluster. vibrational predissociation of investigated by theory, quasiclassical trajectory (QCT) calculations, and experiment, following infrared excitation hydrogen-bonded OH-stretch fundamental. energetically possible dissociation pathways are HCl + (H2O)3 (Pathway 1) H2O HCl-(H2O)2 2). monomer fragments 2 1 resonance enhanced multiphoton ionization combined with time-of-flight mass spectrometry, their rotational...
The authors implement a noninteractive test of quantumness, or an algorithm for verifying whether untrusted device is capable quantum computation, on ion-trap computer. Their results clearly exceed the classical bound.
To enhance the variational quantum eigensolver (VQE), CAFQA method can utilize classical computational capabilities to identify a better initial state than Hartree-Fock method. Previous research has demonstrated that provided by recovers more correlation energy of and results in faster convergence. In present study, we advance investigation demonstrating its advantages on high-fidelity trapped-ion computer located at Duke Quantum Center -- this is first experimental demonstration...
Identifying and characterizing multi-body interactions in quantum processes remains a significant challenge. This is partly because 2-body can produce an arbitrary time evolution, fundamental fact often called the universality of 2-local gates context computing. However, when unknown Hamiltonian respects U(1) symmetry such as charge or particle number conservation, N-body exhibit distinct symmetry-protected signature known phase, which fewer-body cannot mimic. We develop demonstrate...
Cell suppression is a technique commonly used in the publishing of economic data tabular formats. The sensitive entries, which are called primary suppressions, need to be suppressed. However, cells alone still allows one estimate range for each missing values by considering published entries; additional entries must authors present neural network model seeks learn table blank out guarantee specified levels protection. employs backpropagation. trained on solutions from heuristic,...
A test of quantumness is a protocol where classical user issues challenges to quantum device determine if it exhibits non-classical behavior, under certain cryptographic assumptions. Recent attempts implement such tests on current computers rely either interactive with efficient verification, or non-interactive inefficient (exponential time) verification. In this paper, we execute an ion-trap computer. Our results significantly exceed the bound for device's success.