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 101 - 125 of 9846

Targeted enrichment of 28Si thin films for quantum computing

March 9, 2020
Author(s)
Ke Tang, Hyun S. Kim, Aruna N. Ramanayaka, David S. Simons, Joshua M. Pomeroy
… is regarded as an ideal host material for semiconducting quantum computing due to the lack of 29Si nuclear spins. … decoherence and the exact level of enrichment needed for quantum computing remain unknown. Here we use hyperthermal … Targeted enrichment of 28Si thin films for quantum computing …

Quantifying the post-quantum security-margin of popular block ciphers

March 27, 2018
Author(s)
Yi-Kai Liu, Brittanney Amento-Adelmann, Markus Grassl, Brandon Langenberg, Eddie Schoute, Rainer Steinwandt
… requires the implementation of the target cipher on a quantum computer. We report quantum circuits and resource bounds for various block … Cryptography, quantum computing, block ciphers, quantum algorithms … Quantifying the post-quantum security-margin of popular block ciphers …

Measurement-induced quantum phases realized in a trapped-ion quantum computer

June 2, 2022
Author(s)
Michael Gullans, Alexey Gorshkov, David Huse, Christopher Monroe, Crystal Noel, Pradeep Niroula, Daiwei Zhu, Andrew Risinger, Laird Egan, Debopriyo Biswas, Marko Cetina
… Many-body open quantum systems balance internal dynamics against decoherence … an environment. Here, we explore this balance via random quantum circuits implemented on a trapped-ion quantum computer, where the system evolution is represented … Quantum information science, phase transitions, error …

Random decoupling schemes for quantum dynamical control and error suppression

February 18, 2005
Author(s)
Lorenza Viola, Emanuel Knill
… setting for random dynamical decoupling, applicable to quantum , engineering of both closed-and open-system … to standard cyclic protocols. Implications for reliable quantum computation are discussed. … decoupling, quantum computation, quantum error control … Random decoupling schemes for quantum dynamical control and error suppression …

The membership problem for constant-sized quantum correlations is undecidable

January 26, 2021
Author(s)
Carl A. Miller, Honghao Fu, William Slofstra
… parties make measurements on an unknown entangled quantum state, what correlations can they achieve? How … is it to determine whether a given correlation is a quantum correlation? These questions are central to problems in quantum communication and computation. Previous work has …

Quantum gate teleportation between separated zones of a trapped-ion processor

May 31, 2019
Author(s)
Yong Wan, Daniel Kienzler, Stephen D. Erickson, Karl H. Mayer, Ting R. Tan, Jenny J. Wu, Hilma H. Macedo De Vasconcelos, Scott C. Glancy, Emanuel H. Knill, David J. Wineland, Andrew C. Wilson, Dietrich G. Leibfried
… Large-scale quantum computers will inevitably require quantum gate operations between widely separated qubits, even within a single quantum information processing device. Nearly two decades … gate teleportation, Quantum computation, trapped ions … Quantum gate teleportation between separated zones of a …

Portable polarization-entangled photon source & receiver toolset for quantum network metrology

October 4, 2022
Author(s)
Anouar Rahmouni, Thomas Gerrits, Paulina Kuo, Dileep Reddy, Lijun Ma, Xiao Tang, Oliver T. Slattery
… A quantum network will consist of many physically separated nodes connected by quantum communication channels that distribute entanglement … mechanisms for the generation, routing, and measurement of quantum states to fulfill a communication protocol between … Quantum Network Metrology …

Modeling Quantum Information Systems

December 1, 2004
Author(s)
Paul E. Black, Andrew W. Lane
… A simulator for quantum information systems cannot be both general, that is, … in a real system. We illustrate with examples from our quantum computing simulator, QCSim. We model the [3,1] … Quantum Information and Quantum Computing II, Defense and Security, SPIE, Orlando, …

On-chip, photon-number-resolving, telecom-band detectors for scalable photonic information processing

July 30, 2012
Author(s)
Thomas Gerrits, Nick Thomas-Peter, James Gates, Adriana E. Lita, Benjamin Metcalf, Brice R. Calkins, Nathan A. Tomlin, Anna E. Fox, Antia A. Lamas-Linares, Justin Spring, Nathan Langford, Richard P. Mirin, Peter Smith, Ian Walmsley, Sae Woo Nam
… Conference on Quantum Communication, Measurement and Computing … transition edge sensor, integrated waveguide detector, quantum information … Abstracts Conference on Quantum Communication, Measurement and Computing …

Suppressing communication errors using quantum-enabled forward error correction

September 28, 2023
Author(s)
Ivan Burenkov, FNU Nur Fajar Rizqi Annafianto, Jabir Marakkarakath Vadakkepurayil, Abdella Battou, Sergey Polyakov
… but it never was applied in conjugation with the quantum measurement at the receiver. Here, we develop and … protocols in classical communication link enhanced by quantum measurements' confidences [Phys. Rev. Lett. 128, … $10^-9}$, this approach enables reliable utilization of quantum receivers for ultra-low power optical communications, …

Optimal Quantum Measurements of Expectation Values of Observables

January 24, 2007
Author(s)
Emanuel Knill, Gerardo Ortiz, Rolando Somma
… Experimental characterizations of a quantum system involve the measurement of expectation values of observables for a preparable state |f> of the quantum system. Such expectation values can be measured by … exp(-ia H), it is possible to achieve precision 1/ N (the quantum metrology limit) provided sufficient information …

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 … is proving to be a promising avenue toward large-scale quantum computers. However, this optimization is possible … analysis for qubits and resonators in superconducting quantum circuits and discuss what future investigations are …

Quantum Key Distribution System Operating at Sifted-Key Rate Over 4 Mbit/s 1

June 1, 2009
Author(s)
Xiao Tang, Lijun Ma, Alan Mink, Anastase Nakassis, Hai Xu, Barry J. Hershman, Joshua C. Bienfang, David H. Su, Ronald F. Boisvert, Charles W. Clark, Carl J. Williams
… A complete fiber-based polarization encoding quantum key distribution (QKD) system based on the BB84 … fiber of length 1 km and mean photon number 0.1. The quantum channel uses 850 nm photons from attenuated high … division multiplexing devices. Sifted-key rates and quantum error rates at different transmission rates are …

Gated InAs quantum dots embedded in surface acoustic wave cavities for low-noise optomechanics

October 8, 2024
Author(s)
Zixuan Wang, Ryan DeCrescent, Poolad Imany, Joseph Bush, Sae Woo Nam, Richard Mirin, Kevin L. Silverman
… Self-assembled InAs quantum dots (QDs) are promising optomechanical elements due … modulation of photons scattered from these efficient quantum emitters has been recently demonstrated using surface … low-noise optomechanical systems for microwave-to-optical quantum transduction. …

Quantum circuits with many photons on a programmable nanophotonic chip

April 19, 2021
Author(s)
Adriana Lita, Sae Woo Nam, Thomas Gerrits, J. M. Arrazola, V. Bergholm, K Bradler, T R. Bromley, M J. Collins, I Dhand, A Fumagalli, A Goussev, L G. Helt, J Hundal, T Isacsson, R B. Israel, N Quesada, V D. Vaidya, Z Vernon, Y Zhang
… Growing interest in quantum computing for practical applications has led to a … of programmable machines for loading and executing quantum algorithms. Photonic quantum computers have been limited either to … quantum computing, quantum algorithms, integrated nanophotonics, photon …

Post-Quantum Cryptography, and the Quantum Future of Cybersecurity

April 9, 2024
Author(s)
Yi-Kai Liu, Dustin Moody
… the current status of efforts to develop and deploy post-quantum cryptography on the Internet. Then we suggest specific ways in which quantum technologies might be used to enhance cybersecurity … cryptography, and ensuring the trustworthiness of quantum computations. These goals may soon be within reach, …

Guideline on User Authentication Techniques for Computer Network Access Control

September 29, 1980
Author(s)
Institute for Computer Sciences and Technology National Bureau of Standards
… and practices which can be used to control access to computer resources via remote terminals and networks. A … although such equipment has not yet been interfaced to computer terminals to any great extent. In view of the … Institute for Computer Sciences and Technology National Bureau of Standards …

Spectroscopy of atomic and molecular ions using quantum logic

June 25, 2006
Author(s)
Piet Schmidt, Till P. Rosenband, Jeroen Koelemeij, David Hume, Wayne M. Itano, James C. Bergquist, David J. Wineland
… Recently developed techniques for quantum computation using trapped ions allow unprecedented … laser cooling and detection. Furthermore, we discuss how quantum logic can be used to cool molecules to their … atom trapping and cooling, quantum computation, quantum information processing, quantum …

Quantum information processing with trapped ions,

January 1, 2003
Author(s)
David J. Wineland, Murray D. Barrett, Joseph W. Britton, J Chiaverini, B. L. DeMarco, Wayne M. Itano, Branislav M. Jelenkovic, Christopher Langer, Dietrich G. Leibfried, Till P. Rosenband, T Schaetz
… Experiments directed towards the development of a quantum computer based on trapped atomic ions are described … quantum information processing, quantum computation, entanglement, trapped atomic ions … Quantum information processing with trapped ions, …

Relativistic Quantum Walks

October 16, 2008
Author(s)
Frederick Strauch
… relation between the one-dimensional Dirac equation and quantum walks, the physical role of quantum interference in the latter is explained. It is shown … that the time evolution of the probability density of a quantum walker, initially localized on a lattice, is directly …

Liquid-state NMR Simulations of Quantum Many-body Problems

April 1, 2005
Author(s)
C. Negrevergne, Rolando Somma, Gerardo Ortiz, Emanuel Knill, R. Laflamme
… form and so do not change the concurrence. Hence for a quantum computation v=k1 a k2, analysis of a in e A allows … in terms of a time-reversal symmetry operator, namely the quantum bit flip |?> ? (-i sy) (x)n | ?*> . In this context, … Fano-Anderson model, liquid state NMR quantum computing, quantum computing, quantum physics …

Implementation of the semiclassical quantum Fourier transform in a scalable system

May 13, 2005
Author(s)
J Chiaverini, Joseph W. Britton, Dietrich G. Leibfried, Emanuel H. Knill, Murray D. Barrett, Brad R. Blakestad, Wayne M. Itano, John D. Jost, C. Langer, R Ozeri, Tobias Schaetz, David J. Wineland
… One of the most interesting future applications of quantum computers is Shor's factoring algorithm, which … The crucial final step in Shor's algorithm is the quantum Fourier transform, which acts on a register of qubits (two-level quantum systems) to determine the periodicity of the input …

Experimental Issues in Coherent Quantum-State Manipulation of Trapped Atomic Ions,

January 1, 1998
Author(s)
David J. Wineland, C Monroe, Wayne M. Itano, Dietrich G. Leibfried, B E. King, D M. Meekhof
… as possible, state manipulations are described in terms of quantum logic operations since the conditional dynamics implicit in quantum logic is central to the creation of entanglement. … some experimental issues in the proposal for trappedion quantum computation by J. I. Cirac and P. Zoller (University …

Low temperature optical photon detectors for quantum information applications

March 11, 2004
Author(s)
Sae Woo Nam, Aaron J. Miller, Danna Rosenberg
… optical photon detectors in a variety of applications in quantum information science and technology. These … extremely low dark count rates, high count rates, high quantum efficiency, and moderate energy resolution for IR to optical photons. We describe three applications, quantum key distribution (QKD), quantum optics with …
Displaying 101 - 125 of 9846
Was this page helpful?