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Physics

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Displaying 276 - 300 of 2493

Tailoring microcombs with inverse-designed, meta-dispersion microresonators

July 17, 2023
Author(s)
Erwan Lucas, Su-Peng Yu, Travis Briles, David Carlson, Scott Papp
Nonlinear wave mixing in optical microresonators ofers new perspectives to generate compact optical-frequency microcombs, which enable an ever-growing number of applications. Microcombs exhibit a spectral profle that is primarily determined by their

ON THE DEVELOPMENT OF AN OPTICAL RUBIDIUM VECTOR ATOMIC MAGNETOMETER

July 16, 2023
Author(s)
Ying-Ju Wang, John Kitching, Isaac Fan, Yang Li
The precise measurement of magnetic fields is a fundamental tool of remote sensing. However, accurately measuring the direction of magnetic fields is challenging with atomic magnetometers. The standard approach of collecting vector measurements involves

Graphene-Based Star-Mesh Resistance Networks

July 12, 2023
Author(s)
Dean G. Jarrett, Ching-Chen Yeh, Shamith Payagala, Alireza Panna, Yanfei Yang, Linli Meng, Swapnil Mhatre, Ngoc Thanh Mai Tran, Heather Hill, Dipanjan Saha, Randolph Elmquist, David B. Newell, Albert Rigosi

Universal visible emitters in nanoscale integrated photonics

June 30, 2023
Author(s)
Gregory Spektor, David Carlson, Zachary Newman, Jinhie Lee Skarda, Neil Sapra, Logan Su, Sindhu Jammi, Andrew Ferdinand, Amit Agrawal, Jelena Vuckovic, Scott Papp
Visible wavelength lasers control quantum matter of atoms and molecules, enable frontiers of physical sensing, and are foundational for various applications. The development of visible integrated photonics opens the possibility for scalable circuits with

Comment on "Search for explanation of the neutron lifetime anomaly"

June 23, 2023
Author(s)
Fred Wietfeldt, Ripan Biswas, Jimmy Caylor, Bret Crawford, Maynard Dewey, Nadia Fomin, Geoffrey Greene, Christopher Haddock, Shannon Hoogerheide, Hans Mumm, Jeffrey Nico, William Snow, Joseph Zuchegno
We respond to issues raised by Serebrov et al. in a recent paper regarding systematic effects in the beam neutron lifetime experiment performed at NIST. We show that these effects were considered in the original analyses and that our corrections and

Oxidation caused by water outgassed from the thermal blanket on the SDO spacecraft

June 23, 2023
Author(s)
Robert F. Berg, Charles S. Tarrio, FRANCIS EPARVIER, ANDREW JONES
The Solar Dynamics Observatory (SDO) is a sun-observing spacecraft that includes two spectrometers that use aluminum membranes to filter solar radiation. The transmission of those filters degraded by a factor of 5 during the first five years after launch

Weak-Measurement-Induced Heating in Bose-Einstein Condensates

June 23, 2023
Author(s)
Emine Altuntas, Ian Spielman
Ultracold atoms are an ideal platform for understanding system-reservoir dynamics of many-body systems. Here, we study quantum back-action in atomic Bose-Einstein condensates, weakly interacting with a far-from resonant, i.e., dispersively interacting

What limits the voltage of GaAs photovoltaic devices under low indoor light?

June 19, 2023
Author(s)
Behrang Hamadani, Margaret Stevens, Matthew Lumb, Kenneth Schmieder
The external radiative efficiency of a photovoltaic device is a useful metric to compare different photovoltaic technologies and material systems. However, under low-intensity indoor lighting, a particular open-circuit voltage dependence arises that cannot

Systematic Improvements in Transmon Qubit Coherence enabled by Niobium Surface Encapsulation

June 14, 2023
Author(s)
Mustafa BAL, Akshay Murthy, Francesco Crisa, Shaojiang Zhu, Florent Lecocq, Joe Aumentado, Joel Ullom, Pete Hopkins
We present a novel transmon qubit fabrication technique that yields systematic improvements in T1 coherence times. In this study, the devices are fabricated using a novel encapsulation strategy that involves passivating the surface of niobium and thereby

A chip-scale atomic beam clock

June 13, 2023
Author(s)
Gabriela Martinez, Chao Li, Alexander Staron, John Kitching, Chandra Raman, William McGehee
We demonstrate a passively pumped, chip-scale atomic beam clock fabricated using a stack of silicon and glass wafers. The device could additionally serve as a platform for compact atom interferometers and other future quantum sensors.

Feedback cooled Bose-Einstein condensation: near and far from equilibrium

June 13, 2023
Author(s)
Ian Spielman, Hilary Hurst, Evan Yamaguchi
Continuously measured interacting quantum systems almost invariably heat, causing loss of quantum coherence. Here we study Bose-Einstein condensates (BECs) subject to repeated weak measurement of the atomic density and describe several protocols for

An ultra-low noise bipolar current source

June 6, 2023
Author(s)
Ian Spielman, Alessandro Restelli, Mingshu Zhao, Junheng Tao, Qiyu Liang
The precise control of dc magnetic fields is crucial in wide range of experimental platforms, from ultracold quantum gases, nuclear magnetic resonance, to precision measurements. In each of these cases the Zeeman effect causes quantum states to shift in

Calibration strategy of the PROSPECT-II detector with external and intrinsic sources

June 1, 2023
Author(s)
Hans Mumm, Denis E. Bergeron, Mark Tyra, Jerome LaRosa, Svetlana Nour, PROSPECT Collaboration
This paper presents an energy scale calibration scheme for an upgraded reactor antineutrino detector in the Precision Reactor Oscillation and Spectrum Experiment (PROSPECT). The PROSPECT collaboration is preparing the upgraded detector, PROSPECT-II (P-II)
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