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Displaying 101 - 125 of 1110

Synthetic Aperture RF Reception using Rydberg Atoms

August 2, 2023
Author(s)
Nik Prajapati, Aly Artusio-Glimpse, Matt Simons, Samuel Berweger, Drew Rotunno, Maitreyi Jayaseelan, Kaleb Campbell, Christopher L. Holloway
Rydberg atoms show great promise for use as self-calibrated electric field sensors for a broad range of frequencies. Their response is traceable to the international system of units making them a valuable tool for a variety of applications including

Accurate measurement of the loss rate of cold atoms due to background gas collisions for the quantum-based cold atom vacuum standard

August 1, 2023
Author(s)
Daniel Barker, James A. Fedchak, Jacek Klos, Julia Scherschligt, Abrar Sheikh, Eite Tiesinga, Stephen Eckel
We present measurements of thermalized collisional rate coefficients for ultra-cold $^7$Li and $^87}$Rb colliding with room-temperature He, Ne, N$_2$, Ar, Kr, and Xe. In our experiments, a combined flowmeter and dynamic expansion system, a vacuum metrology

Inverse Transform Sampling for Efficient Doppler-Averaged Spectroscopy Simulations

July 14, 2023
Author(s)
Drew Rotunno, Nik Prajapati, Samuel Berweger, MATTHEW SIMONS, Aly Artusio-Glimpse, Amy Robinson, chris holloway
We present a thermal velocity sampling method for calculating Doppler-broadened atomic spectra, which more efficiently reaches a smooth limit than regular velocity weighted sampling. The method uses equal-population sampling of the 1-D thermal distribution

Multi-mode Gaussian State Analysis with Total Photon Counting

July 11, 2023
Author(s)
Arik Avagyan, Scott Glancy, Emanuel Knill
The continuing improvement in the qualities of photon-number-resolving (PNR) detectors opens new possibilities for measuring quantum states of light. In this work we consider the question of what properties of an arbitrary multi-mode Gaussian state are

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

Quantum-limited optical time transfer for future geosynchronous links

June 21, 2023
Author(s)
Emily Caldwell, Jean-Daniel Deschenes, Jennifer Ellis, William C. Swann, Benjamin Stuhl, Hugo Bergeron, Nathan R. Newbury, Laura Sinclair
The combination of optical time transfer and optical clocks opens up the possibility of large-scale free-space networks that connect both ground-based optical clocks and future space-based optical clocks. Such networks promise better tests of general

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
Displaying 101 - 125 of 1110