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Quantum Simulation of Electronic Structure with Linear Depth and Connectivity
(American Physical Society (APS), 2018)As physical implementations of quantum architectures emerge, it is increasingly important to consider the cost of algorithms for practical connectivities between qubits. We show that by using an arrangement of gates that ... -
Quantum Simulation of Helium Hydride Cation in a Solid-State Spin Register
(American Chemical Society (ACS), 2015)b initio computation of molecular properties is one of the most promising applications of quantum computing. While this problem is widely believed to be intractable for classical computers, efficient quantum algorithms ... -
Quantum Simulator of an Open Quantum System Using Superconducting Qubits: Exciton Transport in Photosynthetic Complexes
(Institute of Physics, 2012)Open quantum system approaches are widely used in the description of physical, chemical and biological systems. A famous example is electronic excitation transfer in the initial stage of photosynthesis, where harvested ... -
Quantum Spin Dynamics of Mode-Squeezed Luttinger Liquids in Two-Component Atomic Gases
(American Physical Society, 2008)We report on the observation of the phase dynamics of interacting one-dimensional ultracold bosonic gases with two internal degrees of freedom. By controlling the non-linear atomic interactions close to a Feshbach resonance ... -
A quantum spin transducer based on nanoelectromechanical resonator arrays
(Nature Publishing Group, 2010)Isolated electronic and nuclear spins in solids are at present being actively explored for potential quantum-computing applications. Spin degrees of freedom provide an excellent quantum memory, owing to their weak magnetic ... -
Quantum state and process tomography of energy transfer systems via ultrafast spectroscopy
(Proceedings of the National Academy of Sciences, 2011)The description of excited state dynamics in energy transfer systems constitutes a theoretical and experimental challenge in modern chemical physics. A spectroscopic protocol that systematically characterizes both coherent ... -
Quantum State Redistribution With Local Coherence
(2018-04-13)Quantum entanglement and coherence are two fundamental resources for quantum information processing. Recent results clearly demonstrate their relevance in quantum technological tasks, including quantum communication and ... -
Quantum Stochastic Walks: A Generalization of Classical Random Walks and Quantum Walks
(American Physical Society, 2010)We introduce the quantum stochastic walk (QSW), which determines the evolution of a generalized quantum-mechanical walk on a graph that obeys a quantum stochastic equation of motion. Using an axiomatic approach, we specify ... -
Quantum Systems for Computation and Vice Versa
(2022-05-10)The potential of quantum computing has captured the interest of the academic and industrial spheres alike. However, the implementation of quantum systems for advantageous computation requires a good deal of further research, ... -
Quantum Theory of Molecular Collisions in a Magnetic Field: Efficient Calculations Based on the Total Angular Momentum Representation
(American Institute of Physics, 2010)An efficient method is presented for rigorous quantum calculations of atom-molecule and molecule-molecule collisions in a magnetic field. The method is based on the expansion of the wavefunction of the collision complex ... -
The Quantum Theory of Optical Coherence
(American Physical Society (APS), 1963)The concept of coherence which has conventionally been used in optics is found to be inadequate to the needs of recently opened areas of experiment. To provide a fuller discussion of coherence, a succession of correlation ... -
Quantum Times: Physics, Philosophy, and Time in the Postwar United States
(2013-09-18)The concept of time in physics underwent significant changes in the decades following World War II. This dissertation considers several ways in which American physicists grappled with these changes, analyzing the extent ... -
Quantum Transport of Strongly Interacting Photons in a One-Dimensional Nonlinear Waveguide
(American Physical Review, 2012)We present a theoretical technique for solving the quantum transport problem of a few photons through a one-dimensional, strongly nonlinear waveguide. We specifically consider the situation where the evolution of the optical ... -
Quantum Versus Classical Learnability
(Institute of Electrical and Electronics Engineers (IEEE), 2001)Motivated by work on quantum black-box query complexity, we consider quantum versions of two well-studied models of learning Boolean functions: Angluin's (1988) model of exact learning from membership queries and Valiant's ... -
Quantum-Coherence-Enhanced Surface Plasmon Amplification by Stimulated Emission of Radiation
(American Physical Society, 2013)We investigate surface plasmon amplification in a silver nanoparticle coupled to an externally driven three-level gain medium and show that quantum coherence significantly enhances the generation of surface plasmons. Surface ... -
Quantum-Critical Relativistic Magnetotransport in Graphene
(American Physical Society, 2008)We study the thermal and electric transport of a fluid of interacting Dirac fermions using a Boltzmann approach. We include Coulomb interactions, a dilute density of charged impurities and the presence of a magnetic field ... -
Quantum-Dot-Based Resonant Exchange Qubit
(American Physical Society (APS), 2013)We introduce a solid-state qubit in which exchange interactions among confined electrons provide both the static longitudinal field and the oscillatory transverse field, allowing rapid and full qubit control via rf ... -
Quantum-fluctuation-induced time-of-flight correlations of an interacting trapped Bose gas
(American Physical Society, 2017) -
Quantum-mechanical Study of ro-vibrational Transitions in H2 Induced by He Atoms
(American Astronomical Society, 1999)We describe quantum-mechanical scattering calculations of re-vibrational transitions in H-2 induced by collisions with He. We use a close-coupled description of the dynamics which includes full re-vibrational coupling and ... -
A Quantum-Quantum Metropolis Algorithm
(National Academy of Sciences, 2012)The classical Metropolis sampling method is a cornerstone of many statistical modeling applications that range from physics, chemistry, and biology to economics. This method is particularly suitable for sampling the thermal ...