Subcycle quantum physics (Conference Presentation)

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LEITENSTORFER, Alfred, 2017. Subcycle quantum physics (Conference Presentation). SPIE OPTO. San Francisco, California, United States, Jan 28, 2017 - Feb 2, 2017. In: BETZ, Markus, ed., Abdulhakem Y. ELEZZABI, ed.. Ultrafast Phenomena and Nanophotonics XXI. Bellingham:SPIE, 1010216. ISSN 0277-786X. eISSN 1996-756X. ISBN 978-1-5106-0645-6. Available under: doi: 10.1117/12.2254953

@inproceedings{Leitenstorfer2017Subcy-41331, title={Subcycle quantum physics (Conference Presentation)}, year={2017}, doi={10.1117/12.2254953}, number={10102}, isbn={978-1-5106-0645-6}, issn={0277-786X}, address={Bellingham}, publisher={SPIE}, series={SPIE Proceedings}, booktitle={Ultrafast Phenomena and Nanophotonics XXI}, editor={Betz, Markus and Elezzabi, Abdulhakem Y.}, author={Leitenstorfer, Alfred}, note={Article Number: 1010216} }

<rdf:RDF xmlns:dcterms="" xmlns:dc="" xmlns:rdf="" xmlns:bibo="" xmlns:dspace="" xmlns:foaf="" xmlns:void="" xmlns:xsd="" > <rdf:Description rdf:about=""> <dcterms:issued>2017</dcterms:issued> <dc:contributor>Leitenstorfer, Alfred</dc:contributor> <dspace:isPartOfCollection rdf:resource=""/> <dcterms:isPartOf rdf:resource=""/> <dcterms:title>Subcycle quantum physics (Conference Presentation)</dcterms:title> <dc:date rdf:datatype="">2018-02-14T09:50:13Z</dc:date> <dcterms:abstract xml:lang="eng">A time-domain approach to quantum electrodynamics is presented, covering the entire mid-infrared and terahertz frequency ranges. Ultrabroadband electro-optic sampling with few-femtosecond laser pulses allows direct detection of the vacuum fluctuations of the electric field in free space [1,2]. Besides the Planck and electric field fundamental constants, the variance of the ground state is determined solely by the inverse of the four-dimensional space-time volume over which a measurement or physical process integrates. Therefore, we can vary the contribution of multi-terahertz vacuum fluctuations and discriminate against the trivial shot noise due to the constant flux of near-infrared probe photons. Subcycle temporal resolution based on a nonlinear phase shift provides signals from purely virtual photons for accessing the ground-state wave function without amplification to finite intensity. Recently, we have succeeded in generation and analysis of mid-infrared squeezed transients with quantum noise patterns that are time-locked to the intensity envelope of the probe pulses. We find subcycle temporal positions with a noise level distinctly below the bare vacuum which serves as a direct reference. Delay times with increased differential noise indicate generation of highly correlated quantum fields by spontaneous parametric fluorescence. Our time-domain approach offers a generalized understanding of spontaneous emission processes as a consequence of local anomalies in the co-propagating reference frame modulating the quantum vacuum, in combination with the boundary conditions set by Heisenberg’s uncertainty principle. [1] C. Riek et al., Science 350, 420 (2015) [2] A. S. Moskalenko et al., Phys. Rev. Lett. 115, 263601 (2015)</dcterms:abstract> <bibo:uri rdf:resource=""/> <dcterms:available rdf:datatype="">2018-02-14T09:50:13Z</dcterms:available> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:language>eng</dc:language> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dc:creator>Leitenstorfer, Alfred</dc:creator> </rdf:Description> </rdf:RDF>

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