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Displaying records 11 to 20 of 31 records.
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11. Mode reconstruction of a light field by multi-photon statistics
Topic: Quantum Physics
Published: 7/15/2013
Authors: Elizabeth A Goldschmidt, Fabrizio Piacentini, I. Ruo Berchera, Sergey V Polyakov, Silke Peters, Stefan Kuck, Giorgio Brida, Ivo Pietro Degiovanni, Alan L Migdall, Marco Genovese
Abstract: Knowing the underlying number and structure of occupied modes of a light field plays a crucial role in minimizing loss and decoherence of quantum information. Typically, full characterization of the mode structure involves a series of several separ ...

12. Implementation of generalized quantum measurements for unambiguous discrimination of multiple nonorthogonal coherent states
Topic: Quantum Physics
Published: 6/18/2013
Authors: Francisco E. Becerra Chavez, Jingyun Fan, Alan L Migdall
Abstract: Generalized quantum measurements can perform perfect discrimination of nonorthogonal states by allowing for inconclusive results, task which is impossible performing only measurements with definite outcomes. We demonstrate the realization of genera ...

13. Practical implementation of a test of event-based corpuscular model as an alternative to quantum mechanics
Topic: Quantum Physics
Published: 5/8/2013
Authors: Sergey V Polyakov, Alan L Migdall, Ivo Pietro Degiovanni, Fabrizio Piacentini, Giorgio Brida, Marco Genovese, Paola Traina
Abstract: We describe in detail the first experimental test that distinguishes between an event-based corpuscular model of the interaction of photons with matter and quantum mechanics. The test looks at the interference that results as a single photon passe ...

14. 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 ...

15. 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 ...

16. Preface to Proceedings of the International Conference Quantum Theory: Reconsideration of Foundations-6 (QTRF6) held in Vaxjo, Sweden, 11-14 June 2012
Topic: Quantum Physics
Published: 12/18/2012
Authors: Harald Atmanspacher, Andrei Khrennikov, Alan L Migdall, Sergey V Polyakov
Abstract: A wide spectrum of topics was presented in talks at this conference: quantum foundations (especially, Heisenberg's uncertainty relation and its generalizations) and information, mathematical formalism of quantum theory, philosophy, methodology of m ...

17. Quantum interface between an electrical circuit and a single atom
Topic: Quantum Physics
Published: 3/30/2012
Authors: Jacob M Taylor, Dvir Kafri, David Kielpinski, G J Milburn, M J Woolley
Abstract: Atomic systems are remarkably well suited to storage and processing of quantum information. However, their properties are tightly constrained by physical law, causing difficulties in interfacing to optical or electronic devices. On the other hand, q ...

18. Conclusive quantum steering with superconducting transition-edge sensors
Topic: Quantum Physics
Published: 1/10/2012
Authors: Devin H Smith, Marcelo de Almeida, Gillett Geoff, Branciard Cyril, Allesandro Fedrizzi, Weinhold J Till, Adriana Eleni Lita, Brice R. Calkins, Thomas Gerrits, Wiseman H, Sae Woo Nam, Andrew G White
Abstract: Quantum steering allows two parties to verify shared entanglement even if one measurement device is untrusted. A conclusive demonstration of steering through the violation of a steering inequality is of considerable fundamental interest and opens up ...

19. Electron Vortex Beams with High Quanta of Orbital Angular Momentum
Topic: Quantum Physics
Published: 1/14/2011
Authors: Benjamin James McMorran, Amit Kumar Agrawal, Ian M. Anderson, Andrew A Herzing, Henri J Lezec, Jabez J McClelland, John Unguris
Abstract: Analogous to vortices in light optical beams, electron optical beams with helical wavefronts carry orbital angular momentum and promise new capabilities for electron microscopy and other applications. We use nanofabricated diffraction holograms in an ...

20. Low loss superconducting titanium nitride coplanar waveguide resonators
Topic: Quantum Physics
Published: 12/9/2010
Authors: Michael R Vissers, Jiansong Gao, David S. Wisbey, David P Pappas, C. C. Tsuei, A. D. Corcoles, Matthias Steffen
Abstract: Thin films of TiN were sputter-deposited onto Si and sapphire wafers with and without SiN buffer layers. The films were fabricated into RF coplanar waveguide resonators, and internal quality factor measurements were taken at millikelvin temperatures ...

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