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Search Publications

NIST Authors in Bold

Displaying 2076 - 2100 of 3644

Anomalously Fast Decay of the LH-HH Exciton Raman Coherence

October 12, 2021
Author(s)
C N. Borca, A G. VanEngen Spivey, Steven T. Cundiff
… experiment on a weakly disordered GaAs/AlGaAs multiple quantum well. This allows us to measure both the decay of the … and light -hole excitons in a semiconductor multiple quantum well and the decay of the respective optical …

Investigation of Feshbach Resonances in ultra-cold 40K spin mixtures

April 3, 2017
Author(s)
Eite Tiesinga, J Krauser, J Heinze, S Gotze, M Lanbecker, N Flashner, L Cook, T Hanna, K Sengstock, C Becker
… are an indispensable tool for experiments with atomic quantum gases. We report on twenty thus far unpublishedi … for further tunability in experiments with ultracold 40K quantum gases. …

The Peierls Substitution in an Engineered Lattice Potential

May 29, 2012
Author(s)
Karina K. Jimenez Garcia, Lindsay J. LeBlanc, Ross A. Williams, Matthew C. Beeler, Abigail R. Perry, Ian B. Spielman
… Artificial gauge fields open new possibilities to realize quantum many-body systems with ultracold atoms, by … gauge fields may bring ultracold atoms closer to the quantum Hall regime. Here, we present a one-dimensional …

Measurement of Complex Impedance of Individual Metallic Carbon Nanotubes

May 3, 2007
Author(s)
Jan Obrzut, Kalman D. Migler, L F. Dong, J Jiao
… the CCNT value is larger than theoretically predicted quantum capacitance of a perfect tube. We observe a sharp … they imply that the crossover frequency due to quantum capacitance would fall in the range of about 100 GHz. …

The Electronic Kilogram

May 1, 2001
Author(s)
Michael H. Kelley
… mass in terms of other units that are based on fundamental quantum mechanical principles, such as the speed of light, the Josephson voltage, and the quantum Hall resistance. This provides a possible …

Dissipative preparation of W states in trapped ion systems

July 2, 2021
Author(s)
Daniel Cole, Jenny Wu, Stephen Erickson, Panyu Hou, Andrew C. Wilson, Dietrich Leibfried, Florentin Reiter
… Trapped ions, atomic physics, quantum computing, quantum information processing, dissipative entanglement …

100 Years of Superconductivity

July 2, 2012
Author(s)
Richard L. Kautz
… superconductivity, BCS theory, Ginzburg-Landau theory, flux quantum, SQUID, macroscopic quantum state …

Rotational magic conditions for ultracold molecules in the presence of Raman and Rayleigh scattering

October 24, 2023
Author(s)
Svetlana Kotochigova, Qingze Guan, Eite Tiesinga, Vito Scarola, Brian DeMarco, Bryce Gadway
… rotational, spin-orbit and hyperfine degrees of freedom or quantum states, each of which responds in a unique fashion to … radiation. The control over superpositions of these quantum states is key to coherent manipulation of molecules. … For example, the better the coherence time the longer quantum simulations can last. The important quantity for …

Experimental Violation of Bell's Inequalities with Efficient Detection

January 1, 2001
Author(s)
M A. Rowe, D Kielpinski, V Meyer, C A. Sackett, Wayne M. Itano, C Monroe, David J. Wineland
… Rosen used these reasonable assumptions to conclude that quantum mechanics is incomplete. Starting in 1965, Bell and … whereby experimental tests could distinguish between quantum mechanics and local realistic theories. Many … experiments have since been done that are consistent with quantum mechanics and inconsistent with local realism. But …

Bulk-Like Properties Observed From High Density GaN Nanocolumns Grown by Molecular Beam Epitaxy

October 12, 2021
Author(s)
J E. Van Nostrand, R Cortez, J Boecki, J D. Albrecht, C E. Stutz, K L. Averett, Norman Sanford, Albert Davydov
… for optical studies of silicon dopant and InGaN/GaN multi-quantum well layer structures. Significant improvements in quantum well photoluminescence emission intensity and line … thin films grown by MBE. A 311 meV blue shift in the quantum well emission is also observed for quantum wells …

The K-Rotational Labeling Problem for Eigenvectors From Internal Rotor Calculations: Application to Energy Levels of Acetaldehyde Below the Barrier

June 1, 1999
Author(s)
J Ortigoso, I Kleiner, Jon T. Hougen
… The problem of attaching torsional and rotational quantum number labels to computer-generated-numerical … problem in molecules with one methyl top. Quantum number labeling problems arise physically because the … energy surface give faithful representations of the quantum wavefunctions. We therefore conclude that …

Three-dimensional dipolar thermalization in a reactive molecular gas with resonant shielding

October 1, 2021
Author(s)
Jun-Ru Li, William Tobias, Kyle Matsuda, Calder Miller, Giacomo Valtolina, Luigi De Marco, Rueben Wang, John Bohn, Goulven Quemener, Jun Ye
… interactions. This work establishes a longlived bulk quantum gas system with tunable interactions, paving the way for the study of collective quantum many-body physics mediated by long-range interactions. …

Single photon detection timing jitter in a visible light photon counter

June 1, 2010
Author(s)
Burm Baek, Kyle S. McKay, Martin J. Stevens, Jungsang Kim, Henry H. Hogue, Sae Woo Nam
… many attractive features as photon detectors, such as high quantum efficiency and photon number resolution.We report … and increases substantially at lower bias voltages as the quantum efficiency is reduced. …

Bogoliubov Approach to Superfluidity of Atoms in an Optical Lattice

January 1, 2003
Author(s)
A M. Rey, Karen G. Burnett, R Roth, M Edwards, Carl J. Williams, Charles W. Clark
… This enables us to explore the connection between the quantum depletion of the condensate and the quasi-momentum … may be characterized through the filling of the band by quantum depletion, which should be directly observable via …

Measurement resolution enhanced coherence for lattice fermions

February 25, 2025
Author(s)
Ian Spielman, Hilary Hurst, Yik Teoh
… enables the extraction of targeted information from a quantum system while minimizing decoherence due to measurement backaction. However, in many-body quantum systems backaction can have unexpected effects on … affects both the rate of stochastic evolution for each quantum trajectory and the allowed final states. The full …

Broadband microwave electrical transport spectroscopy for two-dimensional material systems

May 24, 2022
Author(s)
Antonio Levy, Neil M. Zimmerman
… are observed [2], and artificial lattices for analog quantum simulations [3]. Most previous techniques are … Hone, M. O. Goerbig and C. R. Dean, "Competing Fractional Quantum Hall and Electron Solid Phases in Graphene," Physical … Klimeck, M. Y. Simmons, L. C. L. Hollenberg and S. Rogge, "Quantum simulation of the Hubbard model with dopant atoms in …

Ultra-sensitive mid-infrared emission spectrometer using a WSi superconducting nanowire single-photon detector

June 11, 2018
Author(s)
Varun Verma, Martin Stevens, Richard Mirin, Sae Woo Nam, Li Chen, Dirk Schwarzer, Jascha A. Lau
… resolution. The a-WSi SNSPD shows saturated internal quantum efficiency at wavelengths between 1.5 υm and 2.5 υm, where the absolute internal quantum efficiency is found to be close to unity. The internal quantum efficiency remains above 10 % at wavelengths as long …

Photo-Assisted Tuning of Si Nano-Crystal Photoluminescence

February 2, 2007
Author(s)
Jonghoon Choi, Nam S. Wang, Vytas Reipa
… are relaxed in 1-5 nm dia Si crystals as a result of quantum confinement effects and bright photoluminescence in … and smaller probes than metal chalcogenide based quantum dots. Published Si nanocrystal production procedures … with the particle size. Significant improvement in PL quantum yield is observed following acid treatment suggesting …
Displaying 2076 - 2100 of 3644
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