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Search Publications

NIST Authors in Bold

Displaying 1 - 25 of 921

Broadband pulsed quadrature measurements with calorimeters

December 8, 2025
Author(s)
Ezad Shojaee, James R. van Meter, Karl Mayer, Scott Glancy, Emanuel Knill
A general one-dimensional quantum optical mode is described by a shape in the time or frequency domain. A fundamental problem is to measure a quadrature operator of such a mode. If the shape is narrow in frequency this can be done by pulsed homodyne

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

Single-photon time-of-flight measurements for benchmarking time transfer in quantum networks

November 14, 2025
Author(s)
Dongxing He, Paulina Kuo, YaShian Li-Baboud, Anouar Rahmouni, Matthew Shaw, Boris Korzh, Thomas Gerrits
We propose a single-photon time-of-flight (ToF) measurement method to benchmark fiber-path delay estimation in optical two-way time and frequency transfer (OTWTFT) protocols. The single-photon ToF measurement yields uncertainties better than 2 ps (0.5 mm

Unraveling spin entanglement using quantum gates with scanning tunneling microscopy-driven electron spin resonance

October 31, 2025
Author(s)
Eric Switzer, Jose Reina Galvez, Geza Giedke, Talat Rahman, Christoph Wolf, Deung-Jang Choi, Nicolas Lorente
Quantum entanglement is a fundamental resource for quantum information processing, and its controlled generation and detection remain key challenges in scalable quantum architectures. Here, we demonstrate the deterministic generation of entangled spin

Temperature-Compensated Multi-Level CMOS Modulators Operating from 10 K to 300 K for Cryogenic Interconnects

October 14, 2025
Author(s)
Christopher Kniss, Abhishek Sharma, Ratanak Phon, Gregory Shimon, Eran Socher, Pragya Shrestha, Karthick Ramu, Jason Campbell, Amin Pourvali, Richard Al Hadi, Yanghyo Kim
This work presents temperature-compensated cryogenic CMOS modulators operating over a 10-300 K temperature range, suitable for intra- and inter-thermal cryogenic communications. Conventional metal-based coax cables suffer from a fundamental trade-off

Scalable and fault-tolerant preparation of encoded k-uniform states

October 3, 2025
Author(s)
Shayan Majidy, Dominik Hangleiter, Michael Gullans
k-uniform states are valuable resources in quantum information, enabling tasks such as teleporta- tion, error correction, and accelerated quantum simulations. However, verifying k-uniformity is as difficult as measuring code distances, and devising fault

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 Unsupervised Photon Counting from Transition Edge Sensor Signals

September 5, 2025
Author(s)
Nicolas Dalbec-Constant, Guillaume Thekkadath, Duncan England, Thomas Gerrits, Nicolas Quesada
We compare methods for signal classification applied to voltage traces from transition edge sensors (TES) which are photon-number resolving detectors fundamental for accessing quantum advantages in information processing, communication and metrology. We

BenchQC: A Benchmarking Toolkit for Quantum Computation

August 4, 2025
Author(s)
Nia Rodney-Pollard, Kamal Choudhary
The Variational Quantum Eigensolver (VQE) is a widely studied hybrid classical-quantum algorithm for approximating ground-state energies in molecular and materials systems. This study benchmarks the performance of the VQE for calculating ground-state

Single-photon Sources and Detectors Dictionary

August 4, 2025
Author(s)
Joshua Bienfang, Thomas Gerrits, Paulina Kuo, Alan Migdall, Sergey Polyakov, Oliver Slattery
The intention of this dictionary is to define relevant terms and metrics used in the characterization of single-photon detectors and sources with the goal to promote better understanding and communication of those metrics across the single-photon

Error mitigation thresholds in noisy random quantum circuits

July 25, 2025
Author(s)
Pradeep Niroula, Sarang Gopalakrishnan, Michael Gullans
Extracting useful information from noisy near-term quantum simulations requires error mitigation strategies. A broad class of these strategies rely on precise characterization of the noise source. We study the performance of such strategies when the noise

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

Radial polarization imaging of entangled biphoton state

June 11, 2025
Author(s)
Jiung Kim, Jeeseong Hwang, Martin Sohn
Polarization entanglement of single photons is a key element to enable quantum 2.0 applications such as quantum computing, quantum networks, and quantum sensing. Verification and fidelity assessment of quantum entanglement of single photon pairs correlated

Fault-Tolerant Compiling of Classically Hard Instantaneous Quantum Polynomial Circuits on Hypercubes

May 28, 2025
Author(s)
Dominik Hangleiter, Marcin Kalinowkski, Dolev Bluvstein, Madelyn Cain, Nishad Maskara, Xun Gao, Aleksander Kubica, Mikhail Lukin, Michael Gullans
Quantum computational advantage is challenging to maintain asymptotically in the presence of noise. Fault-tolerant quantum computing provides a route to noiseless computations, but can have high overheads for generic algorithms. Here, we develop a fault

MEMSDuino: An Arduino-Based MEMS Switch Controller

May 1, 2025
Author(s)
Lafe Spietz, Adam Sirois, Nathan Flowers-Jacobs, Peter Hopkins, Samuel Benz, Steve Waltman
Radio frequency cryogenic switches are a critical enabling technology for quantum information science, both for calibration and high throughput testing of samples. Traditionally solenoid-based switches have been used, but transition is being made to MEMS

Modular Autonomous Virtualization System for Two-Dimensional Semiconductor Quantum Dot Arrays

April 30, 2025
Author(s)
Anantha Rao, Donovan Buterakos, Barnaby van Straaten, Valentin John, Cecile Yu, Stefan Oosterhout, Lucas Stehouwer, Giordano Scappucci, Menno Veldhorst, Francesco Borsoi, Justyna Zwolak
Arrays of gate-defined semiconductor quantum dots are among the leading candidates for building scalable quantum processors. High-fidelity initialization, control, and readout of spin qubit registers require exquisite and targeted control over key

Enabling phase stabilization of quantum networks via displacement-enhanced photon counting

April 23, 2025
Author(s)
Jabir Marakkarakath Vadakkepurayil, Daehyun Ahn, Ivan Burenkov, Abdella Battou, Sergey Polyakov, N. Fajar R. Annafianto
Optical phase stabilization, tracking, and locking in long fiber links are pivotal for the functionality of many communication protocols and distributed sensors. However, conventional phase stabilization methods use strong optical probe signals that may

Multi-mode Gaussian State Analysis with one Bounded Photon Counter

March 25, 2025
Author(s)
Arik Avagyan, Emanuel Knill, Scott Glancy
Gaussian states are ubiquitous in quantum optics and information processing, and it is essential to have effective tools for their characterization. One such tool is a photon-number-resolving detector, and the simplest configuration involves counting the

Mechanical Sensors for Planck-scale Dark Matter Searches via Long-range Forces

February 14, 2025
Author(s)
Jacob Taylor, Juehang Qin, Dorian Amaral, sunil bhave, Erqian Cai, Daniel Carney, Raphael Lang, Shengchao Li, Claire Marvinney, Alberto Marino, Jared Newton, Christopher Tunnell
Dark matter candidates with masses around the Planck-scale are theoretically well-motivated and have been the subject of numerous studies; it has also been suggested that it might be possible to search for dark matter solely via gravitational interactions
Displaying 1 - 25 of 921
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