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Physics

Atomic / Molecular / Quantum

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Displaying 1 - 25 of 661

Efficient production of sodium Bose-Einstein condensates in a hybrid trap

September 10, 2025
Author(s)
Ian Spielman, Stephen Eckel, Gretchen Campbell, Yanda Geng, Shouvikl Mukherjee, Swarnav Banik, Monica Gutierrez~Galan, Hector Sosa-Martinez, Madison Anderson
We describe an apparatus that efficiently produces $^23}$Na Bose-Einstein condensates (BECs) in a hybrid trap that combines a quadrupole magnetic field with a far-detuned optical dipole trap. Using a Bayesian optimization framework, we systematically

Accurate, precise pressure sensing with tethered optomechanics

August 28, 2025
Author(s)
Olivia Green, Yiliang Bao, John R. Lawall, Jason Gorman, Daniel Barker
We show that optomechanical pressure sensors with characterized density and thickness can achieve uncertainty as low as 1.1 % via comparison with a secondary pressure standard. The agreement between the secondary standard and our optomechanical sensors is

Rayleigh-Taylor instability in a binary quantum fluid

August 27, 2025
Author(s)
Ian Spielman, Gretchen Campbell, Stephen Eckel, Yanda Geng, Junheng Tao, Mingshu Zhao, Shouvik Mukherjee
We experimentally investigated the Rayleigh-Taylor instability in an immiscible homogeneous Bose-Einstein condensate (BEC) in different spin states. A magnetic field gradient force pushes two BECs together and induces instability of the interface, leading

Direct measurement of the 3P0 clock state natural lifetime in 87Sr

August 24, 2025
Author(s)
Kyle Beloy, Jonathan Dolde, Dhruva Ganapathy, Xin Zheng, Shuo Ma, Shimon Kolkowitz
Optical lattice clocks based on the narrow transition between (5s2)1S0 -(5s5p)3P0 levels in neutral strontium (Sr) are among the most precise and accurate measurement devices in existence. Although this transition is completely forbidden by selection rules

High-Stability Single-Ion Clock with 5.5 x 10^-19 Systematic Uncertainty

July 14, 2025
Author(s)
Mason Marshall, Daniel Rodriguez Castillo, Willa Dworschack, Alexander Aeppli, Kyungtae Kim, Dahyeon Lee, William Warfield, Nicholas Nardelli, Tara Fortier, Jun Ye, David Ray Leibrandt, David Hume
We report a single-ion optical atomic clock with fractional frequency uncertainty of 5.5 x 10^-19 and frequency stability of 3.5 x 10^-16/sqrttau/s}, based on quantum logic spectroscopy of a single 27Al+ ion. A co-trapped 25Mg+ ion provides sympathetic

Variable Bell states in a polarization-entangled photon source

July 14, 2025
Author(s)
Jabir Marakkarakath Vadakkepurayil, Shruti Sundar, Daniel Razansky
Bell states are fundamental resources in quantum optics, underpinning a range of applications in quantum computation and communication. However, many experimental sources focus on generating a single Bell state, limiting their utility for protocols that

Impact of Ni-like metastable states and hyperfine quenching on charge state distribution in an EBIT

June 30, 2025
Author(s)
Chowdhury Abrar Faiyaz, Endre Takacs, Timothy Burke, FNU Dipti, Galen O'Neil, Adam Hosier, Hunter Staiger, Joseph Tan, Yuri Ralchenko
We show the effects of ladder ionization and hyperfine quenching on charge state distributions and spectral features of ions in electron beam ion trap (EBIT) devices. Ladder ionization with intermediate excitation of metastable states proceeds at lower

Blackbody radiation Zeeman shift in Rydberg atoms

June 23, 2025
Author(s)
Kyle Beloy, Benjamin Hunt, Roger Brown, Tobias Bothwell, Youssef Hassan, Jacob Siegel, Tanner Grogan, Andrew Ludlow
We consider the Zeeman shift in Rydberg atoms induced by room-temperature blackbody radiation (BBR). BBR shifts to the Rydberg levels are dominated by the familiar BBR Stark shift. However, the BBR Stark shift and the BBR Zeeman shift exhibit different

First direct search for light dark matter interactions in a transition-edge sensor

June 23, 2025
Author(s)
Christina Schwemmbauer, Adriana Lita, Yonit Hochberg, Axel Lindner, Friederike Januschek, Manuel Meyer, Benjamin Lehmann
We propose the use of transition-edge sensor (TES) single-photon detectors as a simultaneous target and sensor for direct dark matter searches, and report results from the first search of this kind. We perform a 489 h science run with a TES device

Imaging of induced surface charge distribution effects in glass vapor cells used for Rydberg atom-based sensors

June 1, 2025
Author(s)
Charles Patrick, Noah Schlossberger, Daniel Hammerland, Nikunjkumar Prajapati, Tate McDonald, Samuel Berweger, Rajavardhan Talashila, Alexandra Artusio-Glimpse, Christopher Holloway
We demonstrate the imaging of localized surface electric (E) field effects on the atomic spectrum in a vapor cell used in Rydberg atom-based sensors. These surface E-fields can result from an induced electric charge distribution on the surface. Induced

Random pulse sequences for qubit noise spectroscopy

May 30, 2025
Author(s)
Kaixin Huang, Demitry Farfurnik, Alireza Seif, Mohammad Hafezi, Yi-Kai Liu
Qubit noise spectroscopy is an important tool for the experimental investigation of open quantum systems. However, conventional techniques for implementing noise spectroscopy are time-consuming, because they require multiple measurements of the noise

Compact Blackbody Radiation Atomic Sensor: Measuring Temperature using Optically Excited Atoms in Vapor Cells

April 17, 2025
Author(s)
David La Mantia, Mingxin Lei, Nikunjkumar Prajapati, Noah Schlossberger, Matthew Simons, Christopher Holloway, Julia Scherschligt, Stephen Eckel, Eric Norrgard
We demonstrate a blackbody radiation thermometer based on optically excited rubidium atoms in a vapor cell. Operating as a calibrated contact thermometer from 308K to 343 K, we realize temperature uncertainty as low as 0.04 %, and statistical temperature

Charge-exchange processes in EBIT: implications for spectral analysis of few-electron Fe ions

April 16, 2025
Author(s)
Yang Yang, FNU Dipti, Amy Gall, Nancy Brickhouse, Hunter Staiger, Galen O'Neil, Paul Szypryt, Adam Foster, David Schultz, Aung Naing, Joseph Tan, Daniel Swetz, Michael Fogle, Randall Smith, Yuri Ralchenko, Endre Takacs
Charge-exchange recombination with neutral atoms significantly influences the ionization balance in electron beam ion traps (EBIT) because its cross section is relatively large compared to cross sections of electron collision induced processes. Modeling

Enhancement of Rydberg Blockade via Microwave Dressing

March 27, 2025
Author(s)
Deniz Kurdak, Patrick Banner, Yaxin Li, Sean Muleady, Alexey Gorshkov, S. L. Roston, James Porto
Experimental control over the strength and angular dependence of interactions between atoms is a keycapability for advancing quantum technologies. Here, we use microwave dressing to manipulate andenhance Rydberg-Rydberg interactions in an atomic ensemble
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