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UID:0-884@lptms.universite-paris-saclay.fr
DTSTART:20230718T100000Z
DTEND:20230718T100000Z
DTSTAMP:20230623T073756Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/soutenance-de-the
 se-lorenzo-rosso-2/
SUMMARY:Soutenance de thèse: Lorenzo Rosso - Petit amphi\, bâtiment Pasca
 l n° 530 - 18 Juil 23 10:00
DESCRIPTION:Dissipative Yb gases\n&nbsp\;\nLorenzo Rosso (LPTMS)\n&nbsp\;\n
 \nUltracold atomic gases are an experimental platform to study quantum man
 y-body physics\, allowing the observation of non-trivial many-body phenome
 na in and out of equilibrium\, thus making their theoretical understanding
  a priority. They usually feature a high degree of control over system par
 ameters and allow for an almost perfect decoupling from the surrounding en
 vironment. However\, despite the tremendous  experimental progress\, a pe
 rfect isolation has never been reached\, for instance because of particle 
 losses\, causing energy relaxation and decoherence phenomena. As such\, di
 ssipation is generally seen as an enemy to be fought harshly since it tend
 s to destroy and wash out the interesting quantum effects that can be inve
 stigated. On the other hand\, a research line that developed in the last d
 ecade has shown that this is not always the case. In particular\, the inte
 rplay between the coherent unitary evolution and the coupling to the envir
 onment can lead to a non-trivial dynamics and to stationary states featuri
 ng strong quantum correlations and critical behaviors. Although of primary
  interest to understand the limitations of the simulation of quantum many-
 body physics\, a complete theoretical description of the effect of losses 
 on correlated quantum gases is still lacking. Even if several experiments 
 have studied the dynamics of correlated one-dimensional quantum gases in t
 he presence of losses\, both in the bosonic and fermionic cases\, the theo
 retical characterisation of the interplay between the unitary and lossy dy
 namics has only recently emerged as an important challenge and it is curre
 ntly starting to attract novel attention. This thesis aims at the study of
  lossy correlated gases. Our work puts a particular emphasis on the theore
 tical characterisation of the interplay between the Hamiltonian unitary dy
 namics and losses. We consider different bosonic and fermionic models in t
 he presence of mainly two-body losses\, we devise effective descriptions f
 or the relevant degrees of freedom of such systems\, capable of predicting
  the real time dynamics of the main observables\, which we then benchmark 
 against exact numerical simulation of the full master equation.\n\nJury : 
 Leonardo Mazza (directeur de thèse)\, Igor Lesanovsky (rapporteur)\, Joha
 nnes Schachenmayer (rapporteur)\, Isabelle Bouchoule (examinatrice)\, Andr
 ea De Luca (examinateur)\, Laurent Sanzhez-Palencia (examinateur)
CATEGORIES:seminars
LOCATION:Petit amphi\, bâtiment Pascal n° 530\, rue André Rivière\, Ors
 ay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=rue André Rivière\, Orsay
 \, 91405\, France;X-APPLE-RADIUS=100;X-TITLE=Petit amphi\, bâtiment Pasca
 l n° 530:geo:0,0
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