| Quantum Information Science |
Feb 2012 |
68 pages |
| Authors:
Paul M Alsing; Michael L Fanto; AIR FORCE RESEARCH LAB ROME NY INFORMATION DIRECTORATE
|
 | This is the final report for the AFRL/RI in-house project Quantum Information Science. Under this project we constructed a six qubit (quantum bit) capable photon-based experimental testbed for the development of photon-based quantum gates and circuits and performed experimental and theoretical investigations of quantum computation. These investigations included: theoretical/numerical simulation: (1) a hybrid coarse/fine parallel simulation of Grover's quantum search algorithm; (2) the development of a variant of Grover's algorithm ... |
|
| Grover's Search Algorithm with an Entangled Database State |
Mar 2011 |
18 pages |
| Authors:
Paul M Alsing; Nathan McDonald; AIR FORCE RESEARCH LAB ROME NY INFORMATION DIRECTORATE
|
| Grover s oracle based unstructured search algorithm is often stated as given a phone number in a directory, find the associated name. This paper examines an amplitude amplification algorithm in which the user encodes the directory (e.g. names and telephone numbers) into an entangled database state, which at a later time can be queried on one supplied component entry (e.g. a given phone number t0) to find the other associated ... |
|
| Quantum Computing in a Piece of Glass |
Jan 2011 |
16 pages |
| Authors:
Warner A Miller; Paul M Alsing; Grigoriy Kreymerman; Jonathan R McDonald; Christopher Tison; FLORIDA ATLANTIC UNIV BOCA RATON DEPT OF PHYSICS
|
| Quantum gates and simple quantum algorithms can be designed utilizing the diffraction phenomena of a photon within a multiplexed holographic element. The quantum eigenstates we use are the photon s linear momentum (LM) as measured by the number of waves of tilt across the aperture. Two properties of quantum computing within the circuit model make this approach attractive. First, any conditional measurement can be commuted in time with any unitary ... |
|
| Multipli-Entangled Photons from a Spontaneous Parametric Down-Conversion Source |
Jan 2011 |
13 pages |
| Authors:
Michael L Fanto; Reinhard K Erdmann; Paul M Alsing; Corey J Peters; Enrique J Galvez; AIR FORCE RESEARCH LAB ROME NY INFORMATION DIRECTORATE
|
| In this work, we discuss a novel compact source that generates six pairs of entangled photons via spontaneous parametric down-conversion from a single pass of a pump beam through a crystal assembly. The experimental demonstrations reported are at 810 nm so as to utilize high quantum efficiency Si-APD detectors, but the design can be readily implemented in other wavelength regimes including the telecom bands near 1550 nm. An immediate application ... |
|
| Experimental Limits on Local Realism with Separable and Entangled Photons |
Jan 2011 |
14 pages |
| Authors:
Reinhard K Erdmann; Michael L Fanto; Paul M Alsing; Corey J Peters; Enrique J Galvez; Warner A Miller; AIR FORCE RESEARCH LAB ROME NY INFORMATION DIRECTORATE
|
| Bell's theorem, and inequalities that stem from it, address the conflict between the explanation of key experimental observations by quantum mechanics (QM) and by models expressing Locally Realistic (LR) properties, regardless of their inclusion or exclusion of hidden variables. To demonstrate the conflict between experimental results described by QM and LR models, a physical realization of the quantum state must be chosen. Entangled photons or electrons provide the most viable ... |
|
| Effects of Electronic Quantum Interference, Photonic-Crystal Cavity, Longitudinal Field and Surface-Plasmon- Polariton for Optical Amplification |
09-Apr-2008 |
15 pages |
| Authors:
D A Cardimona; Paul M Alsing; Danhong Huang; AIR FORCE RESEARCH LAB KIRTLAND AFB NM SPACE VEHICLES DIRECTORATE
|
| Some possibilities for coherent optical amplification of a normally-incident and weak radiation field are reviewed based on various physical mechanisms, such as electronic quantum interference induced by a coupling laser field in a three-level system, field enhancement through the cavity confinement of a radiation field in a photonic crystal and field concentration seen in a transmitted near field through a metallic surface grating due to excitation of surface-plasmon-polariton modes. Numerical ... |
|
Reports by Author
