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Your search keyword '"Alsing, Paul M."' showing total 29 results
Start Over Author "Alsing, Paul M." Publisher american physical society (aps)
29 results on '"Alsing, Paul M."'

10. Direct interferometric test of the nonlinear phase-shift gate

Author

Kaulfuss, Peter L., Alsing, Paul M., Hach, Edwin E., III., Smith, A. Matthew, and Fanto, Michael L.

Subjects
Physics, Quantum Physics, Photon, FOS: Physical sciences, Physics::Optics, Linear optical quantum computing, Interference (wave propagation), 01 natural sciences, 010305 fluids & plasmas, Quantum gate, Spontaneous parametric down-conversion, Controlled NOT gate, 0103 physical sciences, Electronic engineering, Coherent states, Quantum Physics (quant-ph), 010306 general physics, Linear phase
Abstract

We propose a direct interferometric test of the Non-Linear Phase Shift Gate (NLPSG), an essential piece of a Knill Laflamme Milburn Contolled-NOT (KLM CNOT) gate. We develop our analysis for the both the case of the original, bulk optical KLM NLPSG and for the scalable integrated nano-photonic NLPSG based on Micro-Ring Resonators (MRRs) that we have proposed very recently. Specifically, we consider the interference between the target photon mode of the NLPSG along one arm of a Mach Zehnder Interferometer (MZI) and a mode subject to an adjustable linear phase along the other arm. Analysis of triple-photon coincidences between the two modes at the output of the MZI and the success ancillary mode of the NLPSG provides a signature of the operation of the NLPSG. We examine the triple coincidence results for experimentally realistic cases of click/no-click detection with sub-unity detection efficiencies. Further we compare the case for which the MZI input modes are seeded with weak Coherent States (w-CS) and to that for which the input states are those resulting from colinear Spontaneous Parametric Down Conversion (cl-SPDC). In particular, we show that, though more difficult to prepare, cl-SPDC states offer clear advantages for performing the test, especially in the case of relatively low photon detector efficiency., Comment: 33 pages, 6 figures

Published
2021

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