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Topic Area: Quantum Physics
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Displaying records 1 to 10 of 32 records.
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1. 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 ...

2. 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 ...

3. 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 ...

4. 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. (David) 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. ...

5. Demonstrating a High Symmetric Single-Photon Heralding Efficiency in Spontaneous Parametric Downconversion
Topic: Quantum Physics
Published: 5/6/2013
Authors: Marcelo Pereira, Francisco Elohim 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 ...

6. 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 Elohim 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 ...

7. Propagation of Vortex Electron Wave Functions in a Magnetic Field
Topic: Quantum Physics
Published: 7/5/2012
Authors: Gregg M. Gallatin, Ben McMorran
Abstract: The physics of coherent beams of photons carrying axial orbital angular momentum (OAM) is well understood and such beams, sometimes known as vortex beams, have found applications in optics and microscopy. Recently electron beams carrying very large ...

8. The non-Abelian Duality Problem
Topic: Quantum Physics
Published: 6/6/2012
Authors: Emanuel H Knill, E. Cobanera, Gerardo Ortiz
Abstract: We exploit a new theory of duality transformations to construct dual representations of models incompatible with traditional duality transformations. Hence we obtain a solution to the long-standing problem of non-Abelian dualities that hinges on two ...

9. Casimir force in micro and nano electro mechanical systems
Topic: Quantum Physics
Published: 7/1/2011
Authors: Ricardo Decca, Vladimir A Aksyuk, Daniel Lopez
Abstract: The book chapter covers current state of the art and prospects for using micro and nano electro mechanical systems for Casimir force measurement.

10. Differential Light Shift Cancellation in a B-Field Insensitive Transition of 87Rb
Topic: Quantum Physics
Published: 2/11/2011
Authors: Radu S. Chicireanu, Karl D. Nelson, Steven M Olmschenk, Nathan Lundblad, A. Derevianko, James V Porto
Abstract: We demonstrate substantial cancellation of the differential light shift of a magnetic-field-insensitive microwave hyperfine (clock) transition in 87Rb atoms trapped in an optical lattice. Up to 95.5% of the differential light shift is cancelled while ...

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