U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 126 - 150 of 1692

VECSEL systems for quantum information processing with trapped beryllium ions

March 10, 2023
Author(s)
Shaun C. Burd, Jussi-Pekka Penttinen, Panyu Hou, Hannah Knaack, Sanna Ranta, Mika Maki, Emmi Kantola, Mircea Guina, Daniel Slichter, Dietrich Leibfried, Andrew C. Wilson
We demonstrate two systems based on vertical-external-cavity surface-emitting lasers (VECSELs) for producing ultraviolet laser light at wavelengths of 235 and 313 nm. The systems are suitable for quantum information processing with trapped beryllium ions

Nb/a-Si/Nb-junction Josephson-based arbitrary waveform synthesizers for quantum information

February 24, 2023
Author(s)
David Olaya, John Biesecker, Manuel Castellanos Beltran, Adam Sirois, Paul Dresselhaus, Samuel P. Benz, Pete Hopkins, Logan Howe
We demonstrate Josephson arbitrary waveform synthesizers (JAWS) with increased operating temperature range for temperatures below 4 K. These JAWS synthesizers were fabricated with externally-shunted Nb/a-Si/Nb junctions whose critical current exhibits

Colloquium: Advances in automation of quantum dot devices control

February 17, 2023
Author(s)
Justyna Zwolak, Jacob Taylor
Arrays of quantum dots (QDs) are a promising candidate system to realize scalable, coupled qubit systems and serve as a fundamental building block for quantum computers. In such semiconductor quantum systems, devices now have tens of individual

Topological charge pumping with subwavelength Raman lattices

February 15, 2023
Author(s)
Ian Spielman, Gediminas Juzeliunas, Domantas Burba, mantas Raciunas
Recent experiments demonstrated deeply subwavelength lattices using atoms with $N$ internal states Raman-coupled with lasers of wavelength $\lambda$. The resulting unit cell was $\lambda/2N$ in extent, an $N$-fold reduction compared to the usual $\lambda/2

Tight Bounds on the Convergence of Noisy Random Circuits to the Uniform Distribution

December 16, 2022
Author(s)
Michael Gullans, Abhinav Deshpande, Bill Fefferman, Alexey Gorshkov, Pradeep Niroula, Oles Shtanko
We study the properties of output distributions of noisy, random circuits. We obtain upper and lower bounds on the expected distance of the output distribution from the uniform distribution. These bounds are tight with respect to the dependence on circuit

High-Fidelity State Preparation, Quantum Control, and Readout of an Isotopically Enriched Silicon Spin Qubit

December 12, 2022
Author(s)
Adam Mills, Charlie Guinn, Michael Gullans, Mayer Feldman, Anthony Sigillito, M. Rakher, J. Kerckhoff, A. C. Jackson, Jason Petta
Quantum systems must be prepared, controlled, and measured with high fidelity in order to per- form complex quantum algorithms. Control fidelities have greatly improved in silicon spin qubits, but state preparation and readout fidelities have generally

Ultra-low loss quantum photonic circuits integrated with single quantum emitters

December 12, 2022
Author(s)
Ashish Chanana, Hugo Larocque, Renan Moreira, Jacques Carolan, Biswarup Guha, Emerson Goncalves De Melo, Vikas Anant, Jin Dong Song, Dirk Englund, Daniel Blumenthal, Marcelo Davanco, Kartik Srinivasan
Photon-based photonic quantum information systems require both scalable ultra-low loss photonic circuits and high-flux sources of single-photons. Direct integration of these sources and circuits is critical to realizing quantum systems that are scalable

Role of Non-Temperature-Gradient Power Flow Terms in Low-Temperature Regenerators

December 1, 2022
Author(s)
Ryan Snodgrass, Joel Ullom, Scott Backhaus
The total power flow through cryocooler regenerators is key to their performance because it reduces the cooling available at the cold heat exchanger. At temperatures near 4 K, the real-fluid properties of helium and the finite-heat-capacity of regenerator

The Mathematics of Quantum Coin-Flipping

December 1, 2022
Author(s)
Carl A. Miller
An expository article (aimed at the general mathematics community) about quantum cryptography and the philosophy of applied mathematics. The article focuses on quantum coin-flipping, a research problem that has a particularly long history.

Constructing quantum many-body scar Hamiltonians from Floquet automata

November 22, 2022
Author(s)
Michael Gullans, Pierre-Gabriel Rozon, Kartiek Agarwal
We provide a systematic approach for constructing approximate quantum many-body scars (QMBS) starting from two-layer Floquet automaton circuits that exhibit trivial many-body re- vivals. We do so by applying successively more restrictions that force local
Displaying 126 - 150 of 1692
Was this page helpful?