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Displaying 551 - 575 of 4555

Measurement-induced quantum phases realized in a trapped-ion quantum computer

June 2, 2022

Author(s)

Michael Gullans, Alexey Gorshkov, David Huse, Christopher Monroe, Crystal Noel, Pradeep Niroula, Daiwei Zhu, Andrew Risinger, Laird Egan, Debopriyo Biswas, Marko Cetina

Many-body open quantum systems balance internal dynamics against decoherence from interactions with an environment. Here, we explore this balance via random quantum circuits implemented on a trapped-ion quantum computer, where the system evolution is

A Critical Compilation of Experimental Data on the 1s2l2l0 Core-Excited States of Li-like Ions from Carbon to Uranium

May 25, 2022

Author(s)

V. I. Azarov, Alexander Kramida, Yuri Ralchenko

Recent advance in calculations of energy levels of the 1s2l2l' core-excited states for ions along the Li isoelectronic sequence from carbon to uranium suggested that theoretical predictions for the 1s22l-1s2l2l' transitions are significantly more precise

Formation and detection of metastable formic acid in a supersonic expansion: High resolution infrared spectroscopy of the jet-cooled cis HCOOH conformer

May 25, 2022

Author(s)

Kirsten Doney, Andrew Kortyna, Ya-Chu Chan, David Nesbitt

Learning Efficient, Collective Monte Carlo Moves with Variational Autoencoders

May 25, 2022

Author(s)

Jacob Monroe, Vincent K. Shen

Discovering meaningful collective variables for enhancing sampling, via applied biasing potentials or tailored MC move sets, remains a major challenge within molecular simulation. While recent studies identifying collective variables with variational

A three-cornered hat analysis of instabilities in two-way and GPS carrier phase time transfer systems.

May 18, 2022

Author(s)

Tom Parker, Victor Zhang, Jian Yao, Gerard Petit, Roger Brown, James Hanssen

A three-cornered hat analysis has been performed on three independent time transfer systems between the United States Naval Observatory (USNO) and the National Institute of Standards and Technology (NIST). These include (1) a direct Two-Way Satellite Time

Simultaneous measurement of outdoor O2, CO2, and CH4 with a dual-comb spectrometer.

May 16, 2022

Author(s)

Nathan Malarich, Brian Washburn, Kevin Cossel, Fabrizio Giorgetta, Brett DePaola, Steven Welch, Eduardo Santos, Nathan R. Newbury, Ian Coddington

We configure a fiber dual-comb spectrometer to measure the O2 delta band (1260 nm) in addition to CO2 and CH4 absorption features (1600 nm).

Broadband polarization insensitivity and high detection efficiency in high-fill-factor superconducting microwire single-photon detectors

May 13, 2022

Author(s)

Dileep Reddy, Negar Otrooshi, Sae Woo Nam, Richard Mirin, Varun Verma

Single-photon detection via absorption in current-biased nanoscale superconducting structures has become a preferred technology in quantum optics and related fields. Single-mode fiber packaged devices have seen new records set in detection efficiency

Dynamics of Transient Hole Doping in Epitaxial Graphene

May 13, 2022

Author(s)

Swapnil Mhatre, Ngoc Thanh Mai Tran, Heather Hill, Dipanjan Saha, Angela R. Hight Walker, Chi-Te Liang, Randolph Elmquist, David B. Newell, Albert Rigosi

Graphene Quantum Electrical Metrology for National Measurement Standards

May 13, 2022

Author(s)

Randolph Elmquist, Swapnil Mhatre, Alireza Panna, Albert Rigosi, Dinesh Patel, Mattias Kruskopf

Defi nitive Detection of Orbital Angular Momentum States in Neutrons by Spin-polarized 3He

May 11, 2022

Author(s)

Terrence J. Jach, John Vinson

A standard method to detect thermal neutrons is the nuclear interaction 3He(n,p)3H. The spin- dependence of this interaction is also the basis of a neutron spin-polarization filter using nuclear polarized 3He. We consider the corresponding interaction for

Experimental Realization of Neutron Helical Waves

May 11, 2022

Author(s)

Michael G. Huber, Charles W. Clark, Dmitry Pushin, Connor Kapahi, Lisa DeBeer-Schmitt, David Cory, Huseyin Ekinci, Melissa Henderson, Dusan Sarenac

Methods of preparation and analysis of structured waves of light, electrons, and atoms have been advancing rapidly. Despite the proven power of neutrons for material characterization and studies of fundamental physics, neutron science has not been able to

Measurements of Absolute, SI-traceable Lunar Irradiance with the Airborne LUnar Spectral Irradiance (air-LUSI) Instrument

May 5, 2022

Author(s)

John T. Woodward IV, Kevin Turpie, Thomas Stone, S. Andrew Gadsden, Andrew Newton, Stephen Maxwell, Steven Grantham, Thomas Larason, Steven W. Brown

The Airborne LUnar Spectral Irradiance (Air-LUSI) instrument is designed to make low uncertainty, hyperspectral measurements of the lunar spectral irradiance from an ER-2 aircraft from altitudes above 95 % to 99 % of the atmosphere. Measurements cover the

Critically Evaluated Spectral Data for Singly Ionized Carbon (C II)

May 4, 2022

Author(s)

Alexander Kramida, K. Haris

All available experimental data on the spectrum of singly ionized carbon have been critically analyzed. Measurement uncertainties of all published studies have been re-assessed. The scope of observational data includes laboratory emission spectra of arcs

Ytterbium Nuclear-Spin Qubits in an Optical Tweezer Array

May 3, 2022

Author(s)

Alec Jenkins, Joanna Lis, Aruku Senoo, Will McGrew, Adam Kaufman

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