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SUMMARY:Direct experimental test of Feynman’s path integral postulates w
 ith single photons
DTSTART:20261006T080000Z
DTEND:20261006T090000Z
DTSTAMP:20261012T170400Z
UID:indico-event-9868@indico.fysik.su.se
DESCRIPTION:Speakers: Jerzy Michal Paczos (Stockholm University)\n\nYong-L
 i Wen\, Li-Man Tian\, Yunfei Wang\, Schanchao Zhang\, Chang Li\, Jianfeng 
 Li\, Enke Wang\, Hui Yan\, and Shi-Liang Zhu\nSci. Adv. 12\, eaeh1011 (202
 6)\nThe experimental validation of fundamental thought experiments in quan
 tum mechanics has profoundly advanced quantum science and technology while
  deepening our understanding of quantum mechanics. However\, experimental 
 studies of the path integral formulation\, a cornerstone of quantum physic
 s\, remain scarce\, especially regarding the two fundamental postulates pr
 oposed by Feynman in 1948\, neither of which has been directly tested. Her
 e\, we present a theoretical proposal for the direct experimental test of 
 Feynman’s postulates\, achieved through the development of a rigorous pr
 opagator-based approach. Furthermore\, we perform comprehensive measuremen
 ts of single photon’s probability amplitudes for more than 1.4 million (
 175) paths\, achieving high fidelity in propagator measurements and enabli
 ng complete reconstruction of the path probability amplitudes. The results
  confirm both postulates: (i) that quantum probabilities emerge from the c
 oherent superposition of all possible paths and (ii) that all possible pat
 hs have equal-magnitude amplitudes\, whereas each path’s phase is determ
 ined by the classical action (in units of ħ). This work not only resolves
  a longstanding foundational gap but also establishes a general experiment
 al framework for investigating path integrals in contemporary quantum syst
 ems.\n\nhttps://indico.fysik.su.se/event/9868/
LOCATION:AlbaNova A5:1041 - CoPS grupprum (AlbaNova Main Building)
URL:https://indico.fysik.su.se/event/9868/
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