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Search Publications

NIST Authors in Bold

Displaying 851 - 875 of 3643

Frequency-bin Entangled Comb of Photon Pairs From a Silicon-on-Insulator Micro-Resonator

January 13, 2011
Author(s)
Jun Chen, Zachary H. Levine, Jingyun Fan, Alan L. Migdall
… We present a quantum-mechanical theory to describe narrow-band photon- … comb lines) spanning from 1.3 µ m to 1.8 µ m. Such on-chip quantum photonic de- vices offer a path toward future integrated quantum photonics and quantum information processing. … Quantum Information, Single Photon, Single Photon Source, …

Intensity Dynamics in a Waveguide Array Laser

February 15, 2011
Author(s)
Kevin L. Silverman, Mingming M. Feng, Richard P. Mirin, Steven T. Cundiff, Matt Williams, J. Nathan N. Kutz
… IEEE Journal of Quantum Electronics … waveguide array, diode laser, intensity dynamics, Quantum dots …

Sideband cooling of micromechanical motion to the quantum ground state

July 6, 2011
Author(s)
John Teufel, Tobias Donner, Dale Li, Michael S. Allman, Katarina Cicak, Adam Sirois, Jed D. Whittaker, Konrad Lehnert, Raymond Simmonds
… of many atomic-scale systems, fuelling progress towards quantum computing with trapped ions and generating new states … between light and motion. However, entering the quantum regime—in which a system has less than a single quantum of motion—has been difficult because sideband cooling …

Unifying fast scrambling, thermalization and entanglement through the measurement of FOTOCs in the Dicke model

April 5, 2019
Author(s)
R. J. Lewis-Swan, Arghavan Safavi-Naini, John Bollinger, Ana Maria Rey
… Scrambling of quantum information is the process by which information … initially stored in the local degrees of freedom of a quantum many-body system spreads over its many-body degrees … unrelated behaviors including thermalization of isolated quantum systems and information loss in black holes. …

Quantum-noise-limited cavity ring-down spectroscopy

March 29, 2014
Author(s)
David A. Long, Adam J. Fleisher, Szymon S. Wojtewicz, Joseph T. Hodges
… The fundamental limit to spectroscopic sensitivity is the quantum noise limit imposed by the photons themselves, often … has yet reached the sensitivity limit imposed by the quantum nature of light. Here we demonstrate quantum-noise-limited CRDS using a heterodyne-detected method …

HEMT Amplified SET Measurements of Individual InGaAs Quantum Dots

August 25, 2006
Author(s)
Kevin Osborn, Mark W. Keller, Richard Mirin
… measure single electrons tunnelling into individual InGaAs quantum dots. The SET detects the charge motion as an … electron tunnels from an underlying n-doped layer, into a quantum dot lying in an intermediate layer. A HEMT on the … of the Stark shift in the first electron state in the quantum dot as a function of lateral electric field. …

Using Temperature to Reduce Noise in Quantum Frequency Conversion

April 23, 2018
Author(s)
Paulina S. Kuo, Jason S. Pelc, Carsten Langrock, M. M. Fejer
… Quantum frequency conversion (QFC) is important in quantum networks to interface nodes operating at different wavelengths and to enable long-distance quantum communication using telecommunications wavelengths. … Using Temperature to Reduce Noise in Quantum Frequency Conversion …

Simultaneous state measurement of coupled Josephson phase qubits

February 25, 2005
Author(s)
Robert McDermott, Raymond Simmonds, Matthias Steffen, Ken B. Cooper, Katarina Cicak, Kevin Osborn, Seongshik Oh, David P. Pappas, John M. Martinis
… One of the many challenges of building a scalable quantum computer is singleshot measurement of all the quantum bits (qubits). We have used simultaneous single-shot … of the two-qubit |01> and |10> states, consistent with quantum mechanical entanglement of these states,thereby …

Spin-Orbit Coupled Molecular Quantum Magnetism Realized in Inorganic Solid

September 21, 2016
Author(s)
Sang-Youn Park, S.-H. Do, K.-Y. Choi, J.-H. Kang, Dongjin Jang, B. Schmidt, Manuel Brando, B.-H. Kim, D.-H. Kim, Nicholas Butch, Seongsu Lee, Sungdae Ji
… state, is of particular interest due to characteristics of quantum magnetism with quantum tunneling phenomena underlying qubits or molecular spintronics for the quantum information devices. Such quantum magnetism has been … Spin-Orbit Coupled Molecular Quantum Magnetism Realized in Inorganic Solid …

Quantum Fluctuations and the Single Junction Coulomb Blockade

January 1, 1990
Author(s)
S Girvin, L Glazman, M Jonson, David R. Penn, Mark D. Stiles
… We investigate the effect of quantum flucuations on the Coulomb blockade in a single … tunnels through the junction. For small Z (relative to the quantum of resistance), a weak power-law sero-bias anomaly … Quantum Fluctuations and the Single Junction Coulomb Blockade …

Quantum-based vacuum metrology at NIST

June 20, 2018
Author(s)
Julia K. Scherschligt, James A. Fedchak, Zeeshan Ahmed, Daniel S. Barker, Kevin O. Douglass, Stephen P. Eckel, Edward T. Hanson, Jay H. Hendricks, Thomas P. Purdy, Jacob E. Ricker, Robinjeet Singh
… Work is ongoing to recast the pascal in terms of quantum properties and fundamental constants and in so doing, … vacuum metrology consistent with the global trend toward quantum-based metrology. NIST has ongoing projects that … Quantum-based vacuum metrology at NIST …

Observing the average trajectories of single photons in a two-slit interferometer

June 3, 2011
Author(s)
Sacha Kocsis, Boris Braverman, Sylvain Ravets, Martin Stevens, Richard Mirin, L. Krister Shalm, Aephraim M. Steinberg
… A consequence of the quantum mechanical uncertainty principle is that one may not discuss the path or "trajectory" that a quantum particle takes, because any measurement of position … define a set of trajectories for an ensemble of quantum particles. We sent single photons emitted by a …

Quantum back-action limits in dispersively measured Bose-Einstein condensates

April 8, 2023
Author(s)
Ian Spielman, Emine Altuntas
… A fundamental tenet of quantum mechanics is that measurements change a system's … Here, we theoretically and experimentally characterize quantum back-action in atomic Bose-Einstein condensates … laser beam. We theoretically describe this process using a quantum trajectories approach where the environment measures …

Microwave measurement beyond the quantum limit with a nonreciprocal amplifier

April 2, 2020
Author(s)
Florent Lecocq, Leonardo Ranzani, Gabriel A. Peterson, Katarina Cicak, Anja Metelmann, Shlomi S. Kotler, Raymond Simmonds, John Teufel, Jose Aumentado
… The measurement of a quantum system is often performed by encoding its state in a … by loss or excess noise on the way to the detector. Even a quantum-limited detector that simultaneously measures a … extract a measurement efficiency of 62% that exceeds the quantum limit and that is not limited by fundamental factors. …

Functionalization-Dependent Induction of Cellular Survival Pathways by CdSe Quantum Dots in Primary Normal Human Bronchial Epithelial Cells

September 5, 2013
Author(s)
Amber Nagy, Jennifer A. Hollingsworth, Bin Hu, Andrea Steinbruck, Peter C. Stark, Cristina Rios Valdez, Momchilo Vuyisich, Michael H. Stewart, Donald H. Atha, Bryant C. Nelson, Rashi Iyer
… Quantum dots (QDs) are semiconductor nanocrystals exhibiting … Genotoxicity, Nanomaterials, Quantum Dots, Cytotoxicity, Comet Assay … Induction of Cellular Survival Pathways by CdSe Quantum Dots in Primary Normal Human Bronchial Epithelial …

Provably efficient machine learning for quantum many-body problems

September 23, 2022
Author(s)
Hsin-Yuan Huang, Richard Kueng, Giacomo Torlai, Victor Albert, John Preskill
… a potentially powerful approach to solving challenging quantum many-body problems that arise in physics and … ML algorithm, after learning from data obtained in quantum experiments, can accurately predict expectation … ML algorithms can efficiently classify a wide range of quantum phases of matter. Our arguments rely heavily on the …

Terahertz Electromagnetically Induced Transparency in Cesium Atoms

September 14, 2020
Author(s)
Sumit Bhushan, Oliver T. Slattery, Xiao Tang, Lijun Ma
… when experimentally realized, has a potential to make Quantum Communication possible with THz signals. … Electromagnetically Induced Transparency, Quantum Memory, Quantum Communication …

Entangled states of trapped atomic ions

June 19, 2008
Author(s)
Rainer Blatt, David J. Wineland
… This article reviews recent experiments on entanglement and quantum information processing that use trapped ions.  It is … atom trapping and cooling, entanglement, quantum information processing, quantum control, quantum-state engineering, trapped ions …

Clock precision beyond the Standard Quantum Limit at 10 -18 level

November 7, 2025
Author(s)
Y.A. Yang, Maya Miklos, Yee Ming Tso, Stella Kraus, Joonseok Hur, Jun Ye
… atomic clock, spin squeezing, standard quantum limit, quantum enhancement, quantum entanglement … Clock precision beyond the Standard Quantum Limit at 10 -18 level …

Amplification, inference, and the manifestation of objective classical information

June 1, 2022
Author(s)
Michael Zwolak
… Abstract Quantum systems are generally open to a large environment … F, of the environment, E, is often quantified by the quantum mutual information or the Holevo quantity that bounds … the classical information about S transmittable by a quantum channel F. The latter is a quantum mutual information …

Resilience-Runtime Tradeoff Relations for Quantum Algorithms

February 3, 2025
Author(s)
Luis Pedro Garcia-Pintos, Tom O'Leary, Tanmoy Biswas, Jacob Bringewatt, Lukasz Cincio, Lucas Brady, Yi-Kai Liu
… of errors. This paradigm is particularly prevalent in quantum computing, where gates are hard to implement and noise rapidly decreases a quantum computer's potential to outperform classical … we find that minimizing the number of operations in a quantum algorithm can be counterproductive, leading to a …
Displaying 851 - 875 of 3643
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