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Search Publications

NIST Authors in Bold

Displaying 776 - 800 of 3643

Detection of Topological Matter with Quantum Gases

June 20, 2013
Author(s)
Ian B. Spielman
… topological matter – with order deeply imbedded it’s quantum mechanical eigenstates structure – presents unique … quantized Hall plateaux in integer and fractional quantum Hall systems show, topology can have macroscopic … topological matter may be created and measured in quantum gases. …

Observation of a fault tolerance threshold with concatenated codes

December 9, 2025
Author(s)
Grace Sommers, Michael Foss-Feig, David Hayes, David Huse, Michael Gullans
… noise to demonstrate the threshold behavior in a real quantum device. We further theoretically test the performance of our scheme as a quantum memory and for universal quantum computation through the preparation of low-noise … quantum computing, quantum error correction, ion traps …

Quantum electrical standards

August 2, 2010
Author(s)
Neil M. Zimmerman
… experiments. A redefinition of those units based on quantum laws would enable a simpler and more reliable … Quantum electrical standards …

Polynomial-Time Classical Simulation of Noisy IQP Circuits after Constant Depth

January 12, 2025
Author(s)
Joel Rajakumar, James Watson, Yi-Kai Liu
… Sampling from the output distributions of quantum computations comprising only commuting gates, known as instantaneous quantum polynomial (IQP) computations, is believed to be … become a leading candidate for testing the capabilities of quantum devices. Here we demonstrate that for an arbitrary …

Coupling Effects in Vertically Stacked Double Quantum Dots: Tight-Binding Approach

October 16, 2008
Author(s)
W Jaskolski, M Zielinski, Garnett W. Bryant
… Atomic-scale effects on electronic coupling in coupled quantum dots are studied. The empirical tight-binding … electronic structure, optical spectra, quantum dots, tight-binding … Coupling Effects in Vertically Stacked Double Quantum Dots: Tight-Binding Approach …

Absolute transition frequencies and quantum interference in a frequency comb based measurement of the 6,7Li D lines

July 6, 2011
Author(s)
Craig J. Sansonetti, Clayton Simien, John D. Gillaspy, Joseph N. Tan, Samuel M. Brewer, Roger C. Brown, Saijun Wu, James V. Porto
… accuracy of 5x10-11 using an optical comb synthesizer. Quantum interference in the laser induced fluorescence for … lithium, optical frequency comb, precision measurements, quantum interference, wavelengths … Absolute transition frequencies and quantum interference in a frequency comb based measurement of …

Tunable quantum beat of single photons enabled by nonlinear nanophotonics

November 22, 2019
Author(s)
Qing Li, Anshuman Singh, Xiyuan Lu, John Lawall, Varun Verma, Richard Mirin, Sae Woo Nam, Kartik Srinivasan
… promising approach for scalable implementation of diverse quantum resources at the chip-scale. Here, we demonstrate the integration of two essential building blocks for quantum information science - quantum sources and frequency converters - in the silicon …

Phase transition in magic with random quantum circuits

September 23, 2024
Author(s)
Michael Gullans
… Maic is a resource that enables quantum computation and quantifies the efficacy of a quantum state for universal fault-tolerant quantum computing. Understanding the mechanisms by which … Phase transition in magic with random quantum circuits …

Manipulating Quantum Dots to Nanometer Precision by Control of Flow

May 28, 2010
Author(s)
Chad Ropp, Roland Probst, Zachary Cummins, Rakesh Kumar, Andrew J. Berglund, Srinivasa R. Raghavan, Edo Waks, Benjamin Shapiro
… Controlled manipulation of quantum dots with nanometer precision is an essential … particle size, making it difficult to manipulate single quantum dots. Here we demonstrate a particle manipulation … with particle size, enabling us to position colloidal quantum dots to within the best positioning accuracies …

Indistinguishability of single photons from dissimilar single-photon sources

June 14, 2011
Author(s)
Sergey V. Polyakov, Glenn S. Solomon, Edward B. Flagg, Alan L. Migdall, Andreas Muller
… In quantum mechanics, particles in identical states are … we demonstrate that photons produced from two separate quantum dots are indistinguishable. Further, we show that … can be manipulated to be indistinguishable from those from quantum dots. The quantum interference in both experiments …

Overwhelming thermomechanical motion with microwave radiation pressure shot noise

August 21, 2015
Author(s)
John D. Teufel, Florent Q. Lecocq, Raymond W. Simmonds
… fundamental sources of noises that enforce the standard quantum limit: the measurement imprecision and … backaction from photon shot noise. We demonstrate that the quantum backaction of the measurement can overwhelm the … nanomechanics, quantum measurement, standard quantum limit, superconductivity …

High-dimensional hyperentanglement of mode-locked two-photon states

June 29, 2015
Author(s)
Zhenda Xie, Tian Zhong, Sajan Shrestha, XinAn Xu, Junlin Liang, Yan-Xiao Gong, Alessandro Restelli, Jeffrey Shapiro, Franco N. Wong, Chee Wei Wong, Joshua Bienfang
… Quantum entanglement is the fundamental resource for quantum information processing and communications, including … and better error resilience [1-9]. In dense-coded quantum communication channels, it is desirable to encode … Quantum optics, Entanglement, Quantum Communications, …

Cryogenic Calibration of a Quantum-based Radio Frequency Source

November 2, 2020
Author(s)
Alirio De Jesus Soares Boaventura, Justus A. Brevik, Dylan Williams, Anna E. Fox, Manuel C. Castellanos Beltran, Peter F. Hopkins, Paul D. Dresselhaus, Samuel P. Benz
… We report on the calibration of quantum-based radio frequency waveforms generated by a … calibration, quantum-based radio frequency waveforms, Josephson arbitrary … Cryogenic Calibration of a Quantum-based Radio Frequency Source …

The Quantum Electro-Mechanical Metrology Suite

March 27, 2024
Author(s)
Frank Seifert, Lorenz Keck, David B. Newell, Darine El Haddad
… is building a robust open-source hardware and software Quantum Electro-Mechanical Metrology Suite (QEMMS) that can provide quantum voltage, resistance, current, mass, and force … The Quantum Electro-Mechanical Metrology Suite …

Verification of a Many-Ion Simulator of the Dicke Model Through Slow Quenches across a Phase Transition

July 27, 2018
Author(s)
Arghavan Safavi-Naini, R. J. Lewis-Swan, Justin G. Bohnet, M. Garttner, Kevin Gilmore, Elena Jordan, J. Cohn, James K. Freericks, Ana Maria Rey, John Bollinger
… a simulator of the Dicke Hamiltonian, an iconic model in quantum optics which features a quantum phase transition between a superradiant … We experimentally implement slow quenches across the quantum critical point and benchmark the dynamics and the … Dicke model, Penning trap, quantum quench, quantum simulation, scrambling, trapped ions …

Induced quantum dot probe for materials characterization

April 19, 2019
Author(s)
Hilary M. Hurst, Yun-Pil Shim, Rusko Ruskov, Charles Tahan
… semiconductor wafer via measuring parameters of an induced quantum dot on the material system of interest with a … (MOS) and silicon/silicon-germanium quantum dot qubits relevant to quantum computing and show how to measure low-lying excited … Induced quantum dot probe for materials characterization …

Effect of Nonresonant Frequencies on the Enhancement of Quantum Beat Amplitudes in Rovibrational States of Li 2 : The Role of State Spacing

December 1, 2002
Author(s)
E Mirowski, H U. Stauffer, J B. Ballard, B Zhang, C L. Hetherington, S R. Leone
… centered at 800 nm provides quantitative comparison of two quantum beat amplitudes as a function of applied phases in … 2-photon transition, femtosecond, quantum control, selectivity … Effect of Nonresonant Frequencies on the Enhancement of Quantum Beat Amplitudes in Rovibrational States of Li 2 : The …

Narrow linewidth source of greatly non-degenerate photon pairs for quantum repeaters from a short singly-resonant cavity

August 26, 2015
Author(s)
Oliver T. Slattery, Paulina S. Kuo, Lijun Ma, Xiao Tang
… Quantum repeaters require entangled photon pair sources to … qubits at atomic transition wavelengths and linewidths for quantum memories. We have experimentally implemented a narrow … Quantum Repeater, Singly Resonant SPDC Cavity, Narrow … source of greatly non-degenerate photon pairs for quantum repeaters from a short singly-resonant cavity …

Experimental Primer on the Trapped Ion Quantum Computer,

January 1, 1998
Author(s)
David J. Wineland, C Monroe, Wayne M. Itano, B E. King, Dietrich G. Leibfried, D M. Meekhof, C J. Myatt, Chris S. Wood
… The development of a quantum computer based on a system of trapped atomic ions is … proposal of Cirac and Zoller. Initial results on a two-bit quantum logic gate are presented, and select experimental … Experimental Primer on the Trapped Ion Quantum Computer, …

Single-Flux-Quantum Multiplier Circuits for Synthesizing Gigahertz Waveforms With Quantum-Based Accuracy

February 3, 2021
Author(s)
Manuel C. Castellanos Beltran, David I. Olaya, Adam J. Sirois, Christine A. Donnelly, Paul Dresselhaus, Samuel Benz, Peter F. Hopkins
… converter (DAC) based on rapid single flux quantum (RSFQ) circuits and a superconducting amplifier based … of synthesizing high-speed signals having output with quantum-based accuracy. The amplifier is an SFQ voltage … Nb-doped silicon barriers. In order to demonstrate the quantum-based reproducibility, stability and performance at 4 …

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 … generated states via two-photon interference measurements, quantum state tomography, and evaluation of the Bell …
Displaying 776 - 800 of 3643
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