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1. Polarization selective Kerr phase shift method for photonic quantum controlled-NOT and polarization gates
Published: 12/30/2014
Authors: C. J. Zhu, Lu Deng, Edward W Hagley
Abstract: We propose a photonic CNOT gate and a polarization gate using a polarization-selective-kerrphase- shift scheme. Using the demonstrated continuous Kerr phase shifting technique we selectively write a π phase shift to one of the circularly polar ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914919

2. High-Fidelity, Weak Light Level Controlled-NOT Gate for Quantum Information Systems
Published: 10/21/2014
Authors: Runbing Li, Chengjie Zhu, Lu Deng, Edward W Hagley
Abstract: Efficient qubit protocols are critically important to quantum information processing, and the ability to manipulate the quantum state of light with the quantum state of another light field is the ultimate enabler of quantum computers 1−7. To th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914628

3. A Dynamic, Ultra-Slow Optical-Matter Wave Analog of Event Horizon
Published: 8/28/2014
Authors: C. J. Zhu, Lu Deng, Edward W Hagley, Mo-Lin Ge
Abstract: We investigate effects of a dynamically increasing medium index to optical-wave propagation in a rubidium condensate. A long pulsed pump lasaer coupling a D2 line transition produces a rapidly-growing internally-generated field. This results in a s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915962

4. High-Fidelity, Weak-Light Polarization Gate for Quantum Information Systems
Published: 6/8/2014
Authors: Lu Deng, Runbing Li, Chengjie Zhu, Edward W Hagley
Abstract: Using a Polarization-Selective-Kerr-Phase-Shift technique we demonstrate an all-optical polarization gate in an atomic gain medium with the control-field intensity equivalent to 20 photons of 10 nanoseconds propagating in a 5-μm mode diameter ph ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915443

5. Highly-Efficient, Broadband Coherent Surface-Mixing-Wave Generation using Amplified Surface Plasmonic Waves
Published: 5/21/2014
Authors: C. J. Zhu, X Zhao, G. X. Huang, Lu Deng, Edward W Hagley
Abstract: We show that coherent broadband surface mixing-wave (SMW) can be very efficiently generated near a metallic surface abutting a quasi-three-level gain medium. The generation process is significantly enhanced by the surface plasmonic wave (SPW) that i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915020

6. Suppression of Directional Light-Wave Mixing in Normal and Quantum Gases
Published: 10/30/2013
Authors: Lu Deng, Chengjie Zhu, Edward W Hagley, W R Garrett
Abstract: We discuss nonlinear optical processes in the presence of quantum gases. We show that in contrast to a normal gas where the medium ,passivelyŠ participates in nonlinear optical processes, quantum gases ,activelyŠ interact with the wave mixing proce ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914201

7. Optical ,CloakingŠ Using Alternate Raman Gain and Free-Space Media in the Presence of Spatially-Distributed Pump Fields
Published: 10/22/2013
Authors: Chengjie Zhu, Lu Deng, Edward W Hagley, Mo-Lin Ge
Abstract: We discuss an optical ,cloakingŠ scheme using three three-level active Raman gain systems in tandem in the presence of a spatially distributed pump field. Using eikonal approximation we first derive the analytical expression of the deflection angle ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914411

8. Highly Efficient Counter-Propagating Narrow-Band Ultraviolet Frequency Conversion in a Quantum Gas
Published: 5/15/2013
Authors: chengjie Zhu, Lu Deng, Edward W Hagley
Abstract: We show that highly efficient ultraviolet frequency up conversion can be established in a single-component quantum gas in the counter-propagating weak pump beam geometry where no frequency up conversion can occur in a normal gas. We also show that al ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913493

9. Light-Wave Mixing in Quantum Gases
Published: 5/1/2013
Authors: Lu Deng, Edward W Hagley, R Q. Wang, Charles W Clark
Abstract: Ninety-five years after Einstein‰s theoretical prediction, we are surrounded in our daily lives by its practical applications. For example, multi-channel telecommunication lasers and even the commonly-used green laser pointers that cost just a fe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912574

10. Fast, Optically Controlled Kerr Phase Shifter for Digital Signal Processing
Published: 4/18/2013
Authors: Runbing Li, Lu Deng, Edward W Hagley, Joshua C Bienfang, Zachary H Levine
Abstract: We demonstrate a large and fast-responding nonlinear Kerr phase shift using a room-temperature 85Rb vapor operated in a Raman gain scheme where the signal wave travels ,superluminallyŠ. Phase shifts of zero to π in comparison with a reference ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913278



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