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Search Publications

NIST Authors in Bold

Displaying 1076 - 1100 of 3643

What happens to entropy production when conserved quantities fail to commute with each other

May 24, 2023
Author(s)
Twesh Upadhyaya, William Braasch, Gabriel Landi, Nicole Halpern
… We extend entropy production to a deeply quantum regime involving noncommuting conserved quantities. … with each other (e.g., energy and particle number). Yet quantum charges can fail to commute. Noncommutation invites … thermodynamics to noncommuting - and so particularly quantum - charges. …

Direct Calibration of Laser Intensity via Ramsey Interferometry for Cold Atom Imaging

May 11, 2023
Author(s)
Emine Altuntas, Ian Spielman
… in units of the atomic saturation intensity Isat. In quantum gas experiments, the atomic sample is enclosed in an … a direct determination of the intensity. Here, we use quantum coherence to create a robust technique for measuring … direct calibration of imaging system losses as well as the quantum efficiency of the sensor. …

Single photon frequency up-conversion and its applications

October 12, 2012
Author(s)
Lijun Ma, Oliver T. Slattery, Xiao Tang
… research projects including the implementation of a quantum key distribution system; the demonstration of a … (SPDC); the characterization of single photons from quantum dots including the measurement of carrier lifetime … high accuracy and the demonstration of the converted quantum dot photons preserving their non-classical features; …

High-efficiency photon-number resolving detectors based on hafnium transition-edge sensors

September 1, 2009
Author(s)
Adriana E. Lita, Brice R. Calkins, Lenson Pellouchoud, Aaron J. Miller, Sae Woo Nam
… states of light is at the foundation of numerous quantum optics experiments and optical quantum information processing implementations. One such non-Gaussian optical quantum state can be obtained by photon subtraction from a … transition edge sensor, Photon number resolving detector, Quantum optics …

Trainspotters Log Major Delays

October 16, 2008
Author(s)
Eric A. Cornell
… information may have technological relevance in the quantum information business. … electromagnetically-induced transparency, quantum optics, slow light …

Matrix Decompositions and Quantum Circuit Design

December 1, 2004
Author(s)
Stephen Bullock
… form and so do not change the concurrence. Hence for a quantum computation v=k1 a k2, analysis of a in e A allows … in terms of a time-reversal symmetry operator, namely the quantum bit flip |?> ? (-i sy) (x)n | ?*>. In this context, … Matrix Decompositions and Quantum Circuit Design …

Hall Voltage Dependence on Inversion Layer Geometry in the Quantum Hall-Effect Regime

June 15, 1981
Author(s)
R W. Rendell, S Girvin
… layer. This singularity is most pronounced in the quantum Hall-effect regime where the Hall angle approaches … standard using inversion-layer measurement in the quantum Hall-effect regime. Limitations of the model and … Hall Voltage Dependence on Inversion Layer Geometry in the Quantum Hall-Effect Regime …

Alternatives to aluminum gates for silicon quantum devices: Defects and strain

September 15, 2021
Author(s)
Ryan Stein, Zachary Barcikowski, Sujitra Pookpanratana, Joshua M. Pomeroy, Michael Stewart
… Gate-defined quantum dots (QD) benefit from the use of small grain size … minimizing defects and minimizing the impact of strain in quantum device fabrication. … Alternatives to aluminum gates for silicon quantum devices: Defects and strain …

On the Effect of Projection on Rank Attacks in Multivariate Cryptography

May 19, 2021
Author(s)
Morten Oygarden, Daniel Smith-Tone, Javier Verbel
… used to be considered a promising candidate for a post-quantum signature system. First suggested in the early 2000s, … scheme made it to the third round of the ongoing NIST post-quantum standardization process. In late 2020, the system … post-quantum cryptography, multivariate cryptography, minrank …

An optical lattice of flux

April 25, 2011
Author(s)
Ian B. Spielman
… magnetic field in which the atoms would realize analogs to quantum Hall states. … artificial gauge fields, fermions, magnetism, quantum simulation …

Frequency-comb spectroscopy on pure quantum states of a single molecular ion

March 27, 2020
Author(s)
Chin-wen Chou, Alejandra L. Collopy, Christoph Kurz, Yiheng Lin, Michael E. Harding, Philipp N. Plessow, Tara M. Fortier, Scott A. Diddams, Dietrich G. Leibfried, David R. Leibrandt
… and limited resolution. Here, we use generally applicable quantum-logic techniques to prepare a single trapped molecular ion in a pure quantum state, drive terahertz rotational transitions with an … Frequency-comb spectroscopy on pure quantum states of a single molecular ion …

Building Blocks for a Scalable Quantum Information Processor Based On Trapped Ions

January 1, 2003
Author(s)
Dietrich G. Leibfried, Murray D. Barrett, A Ben-kish, Joseph W. Britton, J Chiaverini, B. L. DeMarco, Wayne M. Itano, Branislav M. Jelenkovic, John D. Jost, Christopher Langer, D Lucas, V Meyer, Till P. Rosenband, M A. Rowe, T Schaetz, David J. Wineland
… demonstration of the basic building blocks of a scalable quantum information processor architecture using trapped … fashion, an important prerequisite for fault-tolerant quantum computation. … Building Blocks for a Scalable Quantum Information Processor Based On Trapped Ions …

Orbital quantum magnetism in spin dynamics of strongly interacting magnetic lanthanide atoms

May 31, 2018
Author(s)
Ming Li, Eite Tiesinga, Svetlana Kotochigova
… candidates with which to study strong and unconventional quantum magnetism with exotic phases. Here, we use state-of-the-art closed-coupling simulations to model quantum magnetism for pairs of ultracold spin-6 erbium … these strong anisotropic interactions and unconventional quantum magnetism. Multi- channel simulations of magnetic Cr …

Rapid Cooling of the In-Plane Motion of Two-Dimensional Ion Crystals in a Penning Trap to millikelvin Temperatures

February 27, 2024
Author(s)
Wes Johnson, Athreya Shankar, John Zaris, John J. Bollinger, Scott Parker
… stored in a Penning trap offers an attractive platform for quantum sensing and simulation protocols using hundreds of … laser cooling of the planar motion and more robust quantum science experiments with two-dimensional crystals in … ExB modes, laser cooling, Penning tap, quantum sensing, quantum simulation, two-dimensional crystals …

Feedback Induced Magnetic Phases in Binary Bose-Einstein Condensates

December 7, 2020
Author(s)
Ian B. Spielman, Shangjie Guo, Hilary M. Hurst
… is a new route toward engineering novel non-equilibrium quantum matter. Here we develop a theoretical toolbox for quantum feedback control of multicomponent Bose-Einstein … strengths. Our result demonstrates that closed-loop quantum control of Bose-Einstein condensates is a powerful …

Direct Observation of Coherent Population Trapping in a Superconducting Artificial Atom

April 20, 2010
Author(s)
David P. Pappas, Jeffrey S. Kline, Willim R. Kelley, Zachary Dutton, Thomas A. Ohki, john Schlafer, Bashkar Mookerji
… induced transparency (EIT), are clear demonstrations of quantum interference due to coherence in multilevel quantum systems. We report observation of CPT in a … dependence of the excited state population to characterize quantum dephasing times of the system. … Quantum computing, phase qubit, Coherent Population Trapping, …

Interacting Atoms Under Strong Quantum Confinement

June 1, 2000
Author(s)
Eite Tiesinga, Carl J. Williams, F H. Mies, Paul S. Julienne
… of the level shifts and collisional decoherence for quantum computing with atomic systems are given. … Interacting Atoms Under Strong Quantum Confinement …

Observation and control of the anomalous Aharonov-Bohm oscillation in enhanced-mode topological insulator nanowire field-effect transistors

August 14, 2019
Author(s)
Hao Zhu, Curt Richter, Sheng Yu, Huixian Ye, Min Zeng, Qiliang Li
… The Aharonov-Bohm (AB) oscillation is a quantum mechanical phenomenon which reveals the coupling of … function, affecting the phase of the wave function. Such quantum interference effect can be demonstrated through the … can be very attractive for further exploration of quantum phase interference through electrical approaches …
Displaying 1076 - 1100 of 3643
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