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Search Publications

NIST Authors in Bold

Displaying 226 - 250 of 3642

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 …

Quantum interference enables constant-time quantum information processing

July 19, 2019
Author(s)
Thomas Gerrits, Sae Woo Nam, Adriana E. Lita, M. Stobinska, A. Buraczewski, M. Moore, W.R. Clements, J.J. Renema, W.S. Kolthammer, A. Eckstein, I.A. Walmsley
… fast information processing can be performed and whether quantum effects can speed up the best existing solutions. … Here, we report a one-step computation of a fractional quantum KT. The quantum d-nary (qudit) architecture we use … quantum information processing, large photon number states, …

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 …

Measuring out-of-time-order correlations and multiple quantum spectra in a trapped-ion quantum magnet

May 22, 2017
Author(s)
Martin Garttner, Justin G. Bohnet, Arghavan Safavi-Naini, Michael L. Wall, John Bollinger, Ana Maria Rey
… feasible protocols for quantifying the buildup of quantum correlations and coherence are needed, as performing … correlation functions (OTOCs) in a long-range Ising spin quantum simulator with more then 100 ions in a Penning trap. … about the state of the system encoded in the multiple quantum coherence spectrum, extract the quantum state purity, …

Asymptotically Optimal Quantum Circuits for d-level Systems

June 17, 2005
Author(s)
Stephen Bullock, Dianne M. O'Leary, G K. Brennen
… is a -level system whose state space is spanned by , , . Quantum computation has stimulated much recent interest in … We further construct a decomposition for multi-level quantum logics, proving a sharp asymptoticof two-qudit gates … quantum computation, quantum gate, quantum multi-level logic, …

Vulnerabilities in Quantum Key Distribution Protocols

May 1, 2003
Author(s)
David R. Kuhn
… Recently proposed quantum key distribution protocols are shown to be vulnerable … do not invalidate these proofs. Rather, they suggest that quantum cryptographic protocols, like conventional protocols, … computer security, cryptographic protocols, quantum computing, quantum cryptography …

Preserving quantum coherence using optimized open-loop control techniques

May 16, 2010
Author(s)
Michael J. Biercuk, Hermann Uys, Aaron Vandevender, Nobuyasu Shiga, Wayne M. Itano, John J. Bollinger
… describe experimental and theoretical studies of open-loop quantum control techniques known as dynamical decoupling (DD) for the suppression of decoherence-induced errors in quantum systems. Our experiments on trapped atomic ion qubits … -- demonstrate large gains in our ability to preserve quantum coherence in arbitrary noise. …

Trapped Ion Quantum Information Processing with Squeezed Phonons

January 24, 2019
Author(s)
Wenchao Ge, Brian Sawyer, Joseph W. Britton, Kurt Jacobs, John Bollinger, Michael Foss-Feig
… Trapped ions offer a pristine platform for quantum computation and simulation, but improving their … how it can enhance collective spin states useful for quantum metrology, and how it can improve the speed and … systems, an important ingredient for scalable trapped ion quantum computation. Our results are also directly relevant …

Cathodoluminescence Quantum Efficiency of Quantum Dot Thin Films

July 7, 2014
Author(s)
Heayoung Yoon, Christopher C. Bohn, Youngmin Lee, Seung H. Ko, Jonathan S. Steckel, Seth Coe-Sullivan, Nikolai B. Zhitenev
… A thin film of quantum dots (QD) was used to visualize the local … Quantum dot, Cathodoluminescence, Scanning electron microscopy … Cathodoluminescence Quantum Efficiency of Quantum Dot Thin Films …

White Rabbit-assisted quantum network node synchronization with quantum channel coexistence

May 7, 2022
Author(s)
Thomas Gerrits, Ivan Burenkov, Ya-Shian Li-Baboud, Anouar Rahmouni, DJ Anand, FNU Hala, Oliver T. Slattery, Abdella Battou, Sergey Polyakov
… protocol 'White Rabbit' can synchronize two distant quantum-networked nodes to within 4 ps, enabling HOM … Hong Ou Mandel interference, synchronization, White Rabbit, quantum information, quantum network … White Rabbit-assisted quantum network node synchronization with quantum channel …

Artificial intelligence for search and discovery of quantum materials

October 13, 2021
Author(s)
Aaron Kusne, Takeuchi Ichiro, Valentin Stanev, Johnpierre Paglione
… particle physics, and climate science. In the arena of quantum materials, the rise of new experimental and … use of data-driven approaches is changing the landscape of quantum materials research. From rapid construction and … to becoming the lynchpin in the search and discovery of quantum materials. …

Realization of a Quantum Random Walk With Ultracold Atoms

February 1, 2004
Author(s)
D Ciampini, M B. d'Arcy, J M. Grossman, Kristian Helmerson, Paul D. Lett, William D. Phillips, A Vaziri, S L. Rolston
… random walks have many applications in computer science. Quantum random walks (QRWs) [1] have been suggested as the potential basis for quantum computing algorithms. Such algorithms have been … can give insight that may aid in systematically developing quantum computing algorithms with practical applications.We …

Lattice-Based Quantum Advantage from Rotated Measurements

October 18, 2022
Author(s)
Yusuf Alnawakhtha, Atul Mantri, Carl A. Miller, Daochen Wang
… interactions between a classical client and a quantum server. Typically, a protocol has the quantum server prepare a superposition of two bit strings … learning with errors, interactive proofs, delegated quantum computing, proofs of quantumness … Lattice-Based Quantum Advantage from Rotated Measurements …

Multiferroic Quantum Material Ba2Cu1-xMnxGe2O7(O?x?1) as a Potential Candidate for Frustrated Heisenberg Antiferromagnet

July 30, 2024
Author(s)
Henrik Thoma, Rajesh Dutta, Vladimir Hutanu, Veronica Granata, Rosalba Fittipaldi, Qiang Zhang, Jeffrey Lynn, Petr Cermak, Nazir Khan, Shibabrata Nandi, Manuel Angst
… consists of two end-line phases separated by a potentially quantum-critical phase at x = 0.57. An AFM conical structure … Nature Partner Journals Quantum Materials … single ion anisotropy, Dzyaloshinskii-Moriya interaction, Quantum Heisenberg model, neutron diffraction …

Synthesis of Quantum Logic Circuits

January 31, 2006
Author(s)
V V. Shende, Stephen Bullock, I L. Markov
… Operators acting on a collection of two-level quantum-mechanical systems can be represented by quantum circuits.  In this work we develop a decomposition of … by approximately a factor of two.  The required number of quantum controlled-not s (i.e. two-qubit interactions)  (1/2) …

Entanglement Thresholds of Doubly Parametric Quantum Transducers

April 29, 2022
Author(s)
Curtis Rau, Akira Kyle, Alexander T. Kwiatkowski, Ezad Shojaee, John Teufel, Konrad Lehnert, Tasshi Dennis
… Doubly parametric quantum transducers, such as electro-optomechanical devices, … show promise for providing the critical link between quantum information encoded in highly disparate frequencies … would enable long-distance networking of superconducting quantum computers. Rapid experimental progress has resulted …

Optomechanical Quantum Correlations at Room Temperature

June 23, 2017
Author(s)
Thomas P. Purdy, Karen E. Grutter, Kartik A. Srinivasan, Jacob M. Taylor
… measurement-disturbance uncertainty relation. Such quantum effects are typically difficult to observe at room temperature where the motion driven by optical quantum intensity fluctuations is many orders of magnitude … motion from thermally driven motion, observing this quantum backaction signature up to room temperature. While it …

Single Photon Detector Comparison in a Quantum Key Distribution Link Testbed

October 25, 2006
Author(s)
Jonathan L. Habif, David S. Pearson, Robert Hadfield, Robert E. Schwall, Sae Woo Nam, Aaron J. Miller
… photon detector (SSPD) for applications in fiber-based quantum cryptography. The quantum efficiency and dark count rate were measured for each detector, and used to calculate the quantum bit error rate (QBER) for a QKD link. The results … BB84, QKD, quantum communication, quantum key distribution, …

Experimental Low-Latency Device-Independent Quantum Randomness

January 10, 2020
Author(s)
Yanbao Zhang, Lynden K. Shalm, Joshua C. Bienfang, Martin J. Stevens, Michael D. Mazurek, Sae Woo Nam, Carlos Abellan, Waldimar Amaya, Morgan Mitchell, Honghao Fu, Carl A. Miller, Alan Mink, Emanuel H. Knill
… of certified random bits on demand. Device-independent quantum randomness can produce such random bits, but existing quantum-proof protocols and experimental implementations … produce any random bits. We demonstrate device independent quantum randomness from a loophole-free Bell test with a much …

Quantum Information With Neutral Atoms as Qubits

July 1, 2003
Author(s)
James V. Porto, S L. Rolston, B L. Tolra, Carl J. Williams, William D. Phillips
… (optical lattices) offer a possible route toward quantum computation. The atoms can be kept well isolated from … an overview of the prospects for the implementation of quantum information processing in such systems. … laser cooling, optical lattice, quantum computers …

Quantum Teleportation over 100 km of Fiber using MoSi Superconducting Nanowire Single-Photon Detectors

May 15, 2015
Author(s)
Hiroki Takesue, Shellee D. Dyer, Martin Stevens, Varun Verma, Richard Mirin, Sae Woo Nam
… detectors based on MoSi, we successfully achieved quantum teleportation of weak coherent states over 100 km of … for six distinct input states. (OCIS codes: (270.5565) Quantum Communications; (040.5570) Quantum detectors … superconducting nanowire single-photon detectors, quantum communication, quantum optics, quantum teleportation …

Quantum Logic Spectroscopy with Ions in Thermal Motion

April 16, 2020
Author(s)
Daniel Kienzler, Yong Wan, Stephen Erickson, Jenny Wu, Andrew C. Wilson, David J. Wineland, Dietrich Leibfried
… geometric phase gate has been proposed for implementing quantum logic spectroscopy on trapped ions, which combines … its reduced temperature sensitivity, and observe quantum enhanced frequency sensitivity when applied to … clocks and simplified error syndrome measurements for quantum error correction. …

Demonstration of a quantum controlled-NOT gate in the telecom band

April 4, 2008
Author(s)
Jun Chen, Joseph B. Altepeter, Milja Medic, Fook L. Kim, Burc Gokden, Robert Hadfield, Sae Woo Nam, Prem Kumar
… We present the first quantum controlled-NOT (CNOT) gate realized using a … states are produced and fully characterized by performing quantum-state tomography, demonstrating the gate's … operation makes this CNOT gate particularly suitable for quantum-information-processing tasks that are at the …
Displaying 226 - 250 of 3642
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