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You searched on: Topic Area: Quantum Information

Displaying records 1 to 10 of 45 records.
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1. Building one-time memories from isolated qubits
Topic: Quantum Information
Published: 1/14/2014
Author: Yi-Kai Liu
Abstract: One-time memories (OTM's) are a simple type of tamper-resistant cryptographic hardware, that can be used to implement many forms of secure computation, such as one-time programs. Here we investigate the possibility of building OTM's using "isola ...

2. Entangled photon generation in a phase-modulated, quasi-phasematched crystal
Topic: Quantum Information
Published: 10/14/2013
Authors: Paulina S Kuo, Jason S. Pelc, Oliver T Slattery, Yong-Su Kim, Xiao Tang
Abstract: We propose a scheme to generate polarization-entangled photon pairs by spontaneous parametric downconversion in a phase-modulated, type-II, quasi-phasematched (QPM) crystal. Instead of using two distinct crystals to generate |HV>and |VH> stat ...

3. Mode reconstruction of a light field by multi-photon statistics
Topic: Quantum Information
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 ...

4. Efficient, low-noise, single-photon frequency conversion
Topic: Quantum Information
Published: 6/9/2013
Authors: Paulina S Kuo, Jason S. Pelc, Oliver T Slattery, Yong-Su Kim, M. M. Fejer, Xiao Tang
Abstract: We demonstrate simultaneous low-noise and efficient frequency conversion in a periodically poled LiNbO3 waveguide with spectral filtering. We achieve >50% external conversion efficiency and 600 noise counts per second at peak conversion.

5. Demonstrating a High Symmetric Single-Photon Heralding Efficiency in Spontaneous Parametric Downconversion
Topic: Quantum Information
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 ...

6. Experimental test of an event-based corpuscular model modification as an alternative to quantum mechanics
Topic: Quantum Information
Published: 2/13/2013
Authors: Giorgio Brida, Ivo Pietro Degiovanni, Marco Genovese, Alan L Migdall, Fabrizio Piacentini, Sergey V Polyakov, Paola Traina
Abstract: We present the first experimental test that distinguishes between an Event-Based Corpuscular Model (EBCM)9) of the interaction of photons with matter and quantum mechanics. The test looks at the interference that results as a single photon passes t ...

7. Experimental demonstration of a receiver beating the standard quantum limit for multiple nonorthogonal coherent-state discrimination
Topic: Quantum Information
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 ...

8. Adaptive measurements in nonorthogonal state discrimination
Topic: Quantum Information
Published: 12/18/2012
Authors: Francisco E. Becerra Chavez, Alan L Migdall
Abstract: Adaptive measurements represent important resources in quantum information science and quan- tum technologies. They take advantage of the knowledge of partial measurements of the system to optimize subsequent measurements and perform tasks that are ...

9. Introduction to Journal of Modern Optics Special Issue on Single-Photon Devices and Applications
Topic: Quantum Information
Published: 11/15/2012
Authors: Stefan Kuck, Alan L Migdall, Ivo P Degiovanni, Jessica Cheung
Abstract: This special issue accompanies the 5th international conference on single-photon technologies held at the Physikalisch-Technische Bundesanstalt (PTB), Germany, in June 2011. This community has met every two years at national metrology institutes, sta ...

10. Photon Temporal Correlations Measured Using a Dual-Channel Upconversion Detector
Topic: Quantum Information
Published: 10/14/2012
Authors: Paulina S Kuo, Jason S. Pelc, Oliver T Slattery, Martin M. Fejer, Xiao Tang
Abstract: We demonstrate application of a dual-channel upconversion detector as a beamsplitter that preserves photon statistics. We use this beamsplitter to characterize temporal correlations of photons from coherent and pseudo-thermal sources.

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