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UID:8473@i2m.univ-amu.fr
DTSTART;TZID=Europe/Paris:20240405T160000
DTEND;TZID=Europe/Paris:20240405T170000
DTSTAMP:20241124T181436Z
URL:https://www.i2m.univ-amu.fr/evenements/quantum-mechanics-and-statistic
 al-physics/
SUMMARY:Yves Pomeau (...): Quantum mechanics and statistical physics
DESCRIPTION:Yves Pomeau: Even though quantum mechanics (QM) is usually intr
 oduced as a fundamentally statistical theory it has attracted over the yea
 rs a moderate attention of the scientists in the field of statistical theo
 ries\, be they mathematicians or physicists. The ever lingering philosophi
 cal discussions on interpretation of QM witness a status of uncertainty of
  its understanding. Following the plan of our joint book with Minh-Binh Tr
 an on "The statistical physics of non equilibrium quantum phenomena" (Spri
 nger) I shall explain first how to put the random emission of photons by a
 n atom in an excited state into a correct statistical framework based on K
 olmogorov equation for random process\, based on the shortness of the dura
 tion of the emission process or "quantum jump". In a second part I shall e
 xplain the dynamics of a typically quantum process\, the condensation of a
 toms of a Bose gas in the ground state of lowest energy. This is explained
  by a finite time blow up of solutions of the Boltzmann-Nordheim kinetic e
 quation. This blow up\, contrary to some expectations\, is described by a 
 singularity of the second kind in the sense of Zeldovich. I will explain a
 lso how to describe what happens after blow-up.
CATEGORIES:Colloquium
LOCATION:Saint-Charles - FRUMAM  (2ème étage)\, 3 Place Victor Hugo\, Mar
 seille\, 13003\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=3 Place Victor Hugo\, Marse
 ille\, 13003\, France;X-APPLE-RADIUS=100;X-TITLE=Saint-Charles - FRUMAM  (
 2ème étage):geo:0,0
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