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Search Publications

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Displaying 126 - 150 of 863

Cavity Entanglement and State Swapping to Accelerate the Search for Axion Dark Matter

December 10, 2021
Author(s)
K. Wurtz, B.M. Brubaker, Y. Jiang, Elizabeth Ruddy, Dan Palken, Konrad Lehnert
In cavity-based axion dark matter detectors, quantum noise remains a primary barrier to achieving the scan rate necessary for a comprehensive search of the axion parameter space. Here we introduce a method of scan rate enhancement in which an axion

Measurement of electric-field noise from interchangeable samples with a trapped-ion sensor

November 18, 2021
Author(s)
Kyle McKay, Dustin Hite, Philip D. Kent, Shlomi S. Kotler, Dietrich Leibfried, Daniel Slichter, Andrew C. Wilson, David P. Pappas
We demonstrate the use of a single trapped ion as a sensor to probe electric-field noise from interchangeable test surfaces. As proof of principle, we measure the magnitude and distance dependence of electric-field noise from two ion-trap-like samples with

Semiclassical Theory of Photon Echoes with Application to Pr:YSO

November 4, 2021
Author(s)
Zachary H. Levine
Coherent states are used to prepare a crystal using the Atomic Frequency Comb protocol for quantum memory. Here, semiclassical theory is developed and compared to experimental photon echoes of a coherent pulse.

A simple imaging solution for chip-scale laser cooling

November 1, 2021
Author(s)
John Kitching, Gabriela Martinez, A, Gregazzi, Paul Griffin, Aidan Arnold, D. P. Burt, Rodolphe Bouldot, Erling Riis, James McGilligan
We demonstrate a simple stacked scheme that enables absorption imaging through a hole in the surface of a grating magneto-optical trap (GMOT) chip, placed immediately below a micro-fabricated vacuum cell. The imaging scheme is capable of overcoming the

Multiphoton quantum metrology with neither pre- nor post-selected measurements

October 21, 2021
Author(s)
Chenglong You, Mingyuan Hong, Peter Bierhorst, Adriana Lita, Scott Glancy, Steven Kolthammer, Emanuel Knill, Sae Woo Nam, Richard Mirin, Omar Magana-Loaiza, Thomas Gerrits
The quantum statistical fluctuations of the electromagnetic field establish fundamental limits on the sensitivity of optical measurements. This fundamental limit, known as the shot-noise limit, imposes constraints on classical technologies, which can be

Resource theory of quantum uncomplexity

October 21, 2021
Author(s)
Nicole Halpern, Naga Kothakonda, Jonas Haferkamp, Anthony Munson, Jens Eisert, Philippe Faist
Quantum complexity is emerging as a key property of many-body systems, including black holes, topological materials, and early quantum computers. A state's complexity quantifies the number of computational gates required to prepare the state from a simple

Quantum coding with low-depth random circuits

September 24, 2021
Author(s)
Michael Gullans, David A. Huse, Stefan Krastanov, Liang Jiang, Steven T. Flammia
Random quantum circuits have played a central role in establishing the computational advantages of near-term quantum computers over their conventional counterparts. Here, we use ensembles of low-depth random circuits with local connectivity in D ≥ 1

Perspective: Reproducible coherence characterization of superconducting quantum devices

September 6, 2021
Author(s)
Corey Rae McRae, Joshua Combes, Gregory Stiel, Haozhi Wang, Sheng Xiang Lin, David P. Pappas, Josh Mutus
As the field of superconducting quantum computing approaches maturity, optimization of single-device performance is proving to be a promising avenue toward large-scale quantum computers. However, this optimization is possible only if performance metrics

Motional Squeezing for Trapped Ion Transport and Separation

August 20, 2021
Author(s)
Robert Sutherland, Shaun Burd, Daniel Slichter, Stephen Libby, Dietrich Leibfried
Transport, separation, and merging of trapped ion crystals are essential operations for most large-scale quantum computing architectures. In this Letter, we develop a theoretical framework that describes the dynamics of ions in time-varying potentials with

Quantum-enhanced sensing of displacements and electric fields with large trapped-ion crystals

August 6, 2021
Author(s)
Kevin Gilmore, Matthew Affolter, Judith Jordan, Diego Barberena, Robert Lewis-Swan, Ana Maria Rey, John J. Bollinger
Developing the isolation and control of ultracold atomic systems to the level of single quanta has led to significant advances in quantum sensing, yet demonstrating a quantum advantage in real world applications by harnessing entanglement remains a core

Trapped electrons and ions as particle detectors

August 5, 2021
Author(s)
Jacob Taylor, Daniel Carney, Hartmut Haffner, David Moore
Electrons and ions trapped with electromagnetic fields have long served as important high- precision metrological instruments, and more recently have also been proposed as a platform for quantum information processing. Here we point out that these systems

Programmable System on Chip for controlling an atomic physics experiment

July 23, 2021
Author(s)
Ananya Sitaram, Gretchen K. Campbell, Alessandro Restelli
Most atomic physics experiments are controlled by a digital pattern generator used to synchronize all equipment by providing triggers and clocks. Recently, the availability of well-documented open-source development tools has lifted the barriers to using

Dissipative preparation of W states in trapped ion systems

July 2, 2021
Author(s)
Daniel Cole, Jenny Wu, Stephen Erickson, Panyu Hou, Andrew C. Wilson, Dietrich Leibfried, Florentin Reiter
We present protocols for dissipative entanglement of three trapped-ion qubits, and we discuss in detail a scheme that uses sympathetic cooling as the dissipation mechanism. This scheme relies on tailored destructive interference to generate one of six

Hyperspectral study of the coupling between trions in WSe2 monolayers to a circular Bragg grating cavity

June 25, 2021
Author(s)
Marcelo I. Davanco, Oliver Iff, Simon Betzold, Magdalena Moczala-Dusanowska, Matthias Wurdack, Monika Emmerling, Sven Hofling, Christian Schneider
Circular Bragg gratings compose a very appealing photonic platform and nanophotonic interfacefor the controlled light-matter coupling of emitters in nanomaterials. Here, we discuss the integration ofexfoliated monolayers of WSe2with GaInP Bragg gratings

Witnessing the survival of time-energy entanglement through biological tissue and media

June 9, 2021
Author(s)
Daniel J. Lum, Michael Mazurek, Alexander Mikhaylov, Kristen M. Parzuchowski, Ryan M. Wilson, Marcus Cicerone, Ralph Jimenez, Thomas Gerrits, Martin Stevens, Charles Camp
In this work, we demonstrate the preservation of time-energy entanglement of near-IR photons through thick biological media ( 1.55 mm) and tissue ( 235 um) at room temperature. Using a Franson-type interferometer, we demonstrate interferometric contrast of

Ray-based framework for state identification in quantum dot devices

June 7, 2021
Author(s)
Justyna Zwolak, Thomas McJunkin, Sandesh Kalantre, Samuel Neyens, Evan MacQuarrie, Mark A. Eriksson, Jacob Taylor
Quantum dots (QDs) defined with electrostatic gates are a leading platform for a scalable quantum computing implementation. However, with increasing numbers of qubits, the complexity of the control parameter space also grows. Traditional measurement

High-performance semiconductor quantum dot-single- photon sources

June 3, 2021
Author(s)
Glenn S. Solomon
Single photons are a key, fundamental element of most quantum optical technologies, be it for the development of large-scale quantum communication networks, for quantum simulation, or for connecting quantum memories in a quantum computer. The ideal single

Photonic quantum simulations of SSH-type topological insulators with perfect state transfer

June 3, 2021
Author(s)
Thomas Gerrits, Sae Woo Nam, Adriana Lita, M. Stobinska, T Sturges, A. Buraczewski, W.R. Clements, Jelmer J. Renema, Ian Walmsley
Topological insulators could profoundly impact the fields of spintronics, quantum computing and low-power electronics. To enable investigations of these non-trivial phases of matter beyond the reach of present-day experiments, quantum simulations provide
Displaying 126 - 150 of 863