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Displaying 826 - 850 of 4556

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 metals for gates materials because it aids in shrinking the device dimensions. However, it is not clear what differences arise with respect to process-induced defect densities and

High-performance, compact optical standard

September 15, 2021
Author(s)
Zachary Newman, Vincent N. Maurice, Tara Fortier, Connor Fredrick, Scott Diddams, John Kitching, Matthew Hummon
We describe a high-performance, compact optical frequency standard based on a microfabricated Rb vapor cell and a low-noise, external cavity diode laser operating on the Rb two-photon transition at 778 nm. The optical standard achieves an instability of 1

Single-photon detection in the mid-infrared up to 10 micron wavelength using tungsten silicide superconducting nanowire detectors

September 14, 2021
Author(s)
Varun Verma, Adriana Lita, Yao Zhai, Heli C. Vora, Richard Mirin, Sae Woo Nam, Boris Korzh, Alex Walter, Ryan Briggs, Marco Colangelo, Emma Wollman, Andrew Beyer, Jason Allmaras, D. Zhu, Ekkehart Schmidt, A. G. Kozorezov, Matthew Shaw
We developed superconducting nanowire single-photon detectors (SNSPDs) based on tungsten silicide (WSi) that show saturated internal detection efficiency up to a wavelength of 10 um. These detectors are promising for applications in the mid-infrared

Pendellosung Interferometry Probes the Neutron Charge Radius, Lattice Dynamics, and Fifth Forces

September 10, 2021
Author(s)
Benjamin J. Heacock, Robert W. Haun, Michael G. Huber, Albert Henins, Robert C. Valdillez, Takuhiro Fujiie, Katsuya Hirota, Masaaki Kitaguchi, Hirohiko Shimizu, Takuya Hosobata, Masahiro Takeda, Yutaka Yamagata
Structure factors describe how incident radiation is scattered from materials such as silicon and germanium and characterize the physical interaction between the material and scattered particles. We used neutron Pendellösung interferometry to make

High-fidelity laser-free universal control of trapped ion qubits

September 8, 2021
Author(s)
Raghavendra Srinivas, Emanuel Knill, Robert Sutherland, Alexander T. Kwiatkowski, Hannah M. Knaack, Scott Glancy, David J. Wineland, Shaun C. Burd, Dietrich Leibfried, Andrew C. Wilson, David T. Allcock, Daniel Slichter
Universal control of multiple qubits—the ability to entangle qubits and to perform arbitrary individual qubit operations—is a fundamental resource for quantum computing, simulation and networking. Qubits realized in trapped atomic ions have shown the
Displaying 826 - 850 of 4556
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