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Topic Area: Quantum Physics

Displaying records 1 to 10 of 36 records.
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1. Detailed modelling of the susceptibility of a thermally populated, strongly driven circuit-QED system
Topic: Quantum Physics
Published: 11/7/2013
Authors: Anton Frisk Kockum, Martin Olof Sandberg, G¿ran Johansson, David P Pappas
Abstract: We present measurements and modelling of the susceptibility of a 2D microstrip cavity coupled to a driven transmon qubit. We are able to fit the response of the cavity to a weak probe signal with high accuracy in the strong coupling, low detuning, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913814

2. Strong Casimir force reduction by metallic surface nanostructuring
Topic: Quantum Physics
Published: 9/27/2013
Authors: Francesco Intravaia, Stefan T. Koev, Il Woong Jung, Albert A. Talin, Paul S Davids, Ricardo Decca, Vladimir A Aksyuk, Diego A. R. Dalvit, Daniel Lopez
Abstract: The Casimir force is a quantum-mechanical interaction arising from vacuum fluctuations of the electromagnetic (EM) field and is technologically significant in micro- and nanomechanical systems. Despite rapid progress in nanophotonics, the goal of e ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910133

3. High quantum-efficiency photon-number-resolving detector for photonic on-chip information processing
Topic: Quantum Physics
Published: 9/18/2013
Authors: Brice R. Calkins, Paolo L Mennea, Adriana Eleni Lita, Benjamin Metcalf, Steven Kolthammer, Antia A. Lamas-Linares, Justin Spring, Peter C Humphreys, Richard P Mirin, James Gates, Peter Smith, Ian Walmsley, Thomas Gerrits, Sae Woo Nam
Abstract: The integrated optical circuit is a promising architecture for the realization of complex quantum optical states and information networks. One element that is required for many of these applications is a high-efficiency photon detector capable of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913615

4. Signatures of nonlinear cavity optomechanics in the weak coupling regime
Topic: Quantum Physics
Published: 8/2/2013
Authors: John D Teufel, Kjetil Borkje, Andeas Nunnenkamp, Steven Girvin
Abstract: We identify signatures of the intrinsic nonlinear interaction between light and mechanical motion in cavity optomechanical systems. These signatures are observable even when the cavity linewidth exceeds the optomechanical coupling rate. A strong ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914422

5. Dirac fermion heating, current scaling, and direct insulator-quantum Hall transition in multi-layer epitaxial graphene
Topic: Quantum Physics
Published: 8/1/2013
Authors: Randolph E Elmquist, Fan-Hung Liu, Chang-Shun Hsu, Chiashain Chuang, Tak-Pong Woo, Lung-I Huang Huang, Chi-Te Laing, Yasuhiro Fukuyama, Yanfei Yang
Abstract: We have performed magnetotransport measurements on multi-layer epitaxial graphene. By increasing the driving current I through our graphene devices while keeping the bath temperature fixed, we are able to study Dirac fermion heating and current scali ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914323

6. 99.996% 12C films enriched and deposited in situ
Topic: Quantum Physics
Published: 6/28/2013
Authors: Kevin Joseph Dwyer, Joshua M Pomeroy, David S Simons
Abstract: A mass selected ion beam system is used to isotopically enrich and deposit thin films, which are measured to be 99.9961(4)% 12C. In solid state quantum information, isotopic enrichment of materials has allowed significant improvements in the coheren ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913398

7. Optimized superconducting detectors using the proximity effect in Ti/TiN multilayers
Topic: Quantum Physics
Published: 6/14/2013
Authors: David P Pappas, Michael Robert Vissers, Jiansong Gao, Martin Olof Sandberg, David S. Wisbey, Kent D Irwin
Abstract: We apply the superconducting proximity effect in TiN/Ti multi-layers films to tune the critical temperature, $T_C$ (to within 10 mK) with high uniformity (less than 15 mK spread) across a 75 mm wafer. Reproducible $T_C$'s are obtained from 0.8 - 2. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912201

8. Demonstrating a High Symmetric Single-Photon Heralding Efficiency in Spontaneous Parametric Downconversion
Topic: Quantum Physics
Published: 5/6/2013
Authors: Marcelo Pereira, Francisco E. Becerra Chavez, Boris L. Glebov, Jingyun Fan, Sae Woo Nam, Alan L Migdall
Abstract: We demonstrate a symmetric, single-spatial mode, single-photon heralding efficiency of 84% for a type-II spontaneous parametric downconversion process. This achievement of high efficiency, single-spatial mode collection is key to enabling many quantu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913209

9. Bell violation using entangled photons without the fair-sampling assumption
Topic: Quantum Physics
Published: 4/14/2013
Authors: Marissa Giustina, Alexandra Mech, Sven Ramelow, Bernhard Wittman, Johannes Keffler, Joern Beyer, Adriana Eleni Lita, Thomas Gerrits, Sae Woo Nam, Rupert Ursin, Anton Zeilinger, Brice R. Calkins
Abstract: The violation of a Bell inequality is an experimental observation that forces the abandonment of a local realistic viewpoint - namely, one in which physical properties are (probabilistically) defined before and independently of measurement, and in ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913494

10. Experimental demonstration of a receiver beating the standard quantum limit for multiple nonorthogonal coherent-state discrimination
Topic: Quantum Physics
Published: 1/6/2013
Authors: Francisco E. Becerra Chavez, Jingyun Fan, Gerald Baumgartner, Julius Goldhar, Jonathan Kosloski, Alan L Migdall
Abstract: The measurement of the state of a quantum system with inherent quantum uncertainty (noise) approaching the ultimate physical limits is of both technological and fundamental interest. Quantum noise prevents any mutually nonorthogonal quantum states ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912063



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