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Physics

Atomic/molecular/quantum

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Displaying 26 - 50 of 743

Atom-Based Quantum Sensing of Electromagnetic Fields

December 19, 2025
Author(s)
Dmitri Budker, James Shaffer, John Kitching
The spin and electronic degrees of freedom in atomic systems provide sensitive and versatile means for detecting electromagnetic fields, from DC to THz frequencies with spatial resolutions ranging from the nanoscale to meter scale. Such sensors offer

Chirped magneto-optical trap of molybdenum

December 12, 2025
Author(s)
Sai Naga Manoj Paladugu, Nickolas Pilgram, Stephen Eckel, Eric Norrgard
We have directly loaded a cryogenic beam of molybdenum atoms into a magneto-optical trap. By chirping the detuning of the trapping lasers, we were able to enhance the number of atoms loaded into the trap by more than a factor of 2. We optimize the trapped

Argon-Ion Treatment of Multi-Material Layered Surface-Electrode Traps for Noise Mitigation

November 28, 2025
Author(s)
Dustin Hite, Tobias Schaetz, Deviprasath Palani, Florian Hasse, Philip Kiefer, Frederick Bockling, Daniel Stick, Ulrich Warring
Electric-field noise near ion-trap electrodes limits motional coherence and represents a key obstacle to scaling trapped-ion quantum systems. Here, we investigate how in situ Ar+ sputtering modifies motional heating and dephasing in multi-material surface

Two-dimensional imaging of electromagnetic fields via light sheet fluorescence imaging with Rydberg atoms

November 24, 2025
Author(s)
Noah Schlossberger, Tate McDonald, Kevin Su, Rajavardhan Talashila, Robert Behary, Charles L. Patrick, Eugeniy E. Mikhailov, Seth Aubin, Irena Nokivoka, Christopher Holloway, Nikunjkumar Prajapati
Imaging of electric and magnetic fields is limited by the fact that conventional field probes rely on conductive elements that perturb the fields they are meant to measure and require either spatial scanning or arrays to produce field maps. Atomic sensors

Robust Two-Qubit Geometric Phase Gates using Amplitude and Frequency Ramping

November 18, 2025
Author(s)
Christina Bowers, Deviprasath Palani, John Barta, Tyler Guglielmo, Stephen Libby, Dietrich Leibfried, Daniel Slichter
We demonstrate a method for generating entanglement between trapped atomic ions based on adiabatically ramped state-dependent forces. By ramping both the amplitude of the state-dependent force and the motional mode frequencies, we realize an entangling

Towards a quantum repeater using a surface-trap-integrated microcavity and trapped ions

November 18, 2025
Author(s)
Lindsay Sonderhouse, Margaret Bruff, Kaitlyn David, Daniel Slichter, Dietrich Leibfried
Trapped ions are a leading candidate for the "stationary qubits" of a quantum network. However, thus far remote entanglement rates have primarily been limited by low photon collection efficiency. In this work, we propose an architecture for a long-range

Compatibility of trapped ions and dielectrics at cryogenic temperatures

November 17, 2025
Author(s)
Margaret Bruff, Lindsay Sonderhouse, Kaitlyn David, Daniel Slichter, Dietrich Leibfried, Jules Stuart
We study the impact of an unshielded dielectric\textemdash here, a bare optical fiber\textemdash on a $^40}$Ca$^+}$ ion held several hundred $\mu$m away in a cryogenic surface electrode trap. We observe distance-dependent stray electric fields of up to a

Population-resolved measurement of an avoided crossing of light-dressed states

November 17, 2025
Author(s)
Noah Schlossberger, Nikunjkumar Prajapati, Eric Norrgard, Stephen Eckel, Christopher Holloway
A two-level system coupled by a coherent field is a ubiquitous model in atomic and molecular physics. While the resulting avoided crossing of light-dressed states has been extensively probed spectroscopically, such measurements typically reveal only the

Determining angle of arrival of radio frequency fields using subwavelength, amplitude-only measurements of standing waves in a Rydberg atom sensor

September 15, 2025
Author(s)
Rajavardhan Talashila, William Watterson, Benjamin Moser, Joshua Gordon, Alexandra Artusio-Glimpse, Nikunjkumar Prajapati, Noah Schlossberger, Matthew Simons, Christopher Holloway
Deep subwavelength RF imaging with atomic Rydberg sensors has overcome fundamental limitations of traditional antennas and enabled ultra-wideband detection of omni-directional time varying fields all in a compact form factor. However, in most applications

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
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