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TZID:Europe/Paris
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BEGIN:VEVENT
UID:0-636@lptms.universite-paris-saclay.fr
DTSTART:20181108T110000Z
DTEND:20181108T120000Z
DTSTAMP:20181023T055546Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
s-paola-ruggiero/
SUMMARY:Séminaire du LPTMS: Paola Ruggiero - LPTMS\, salle 201\, 2ème ét
age\, Bât 100\, Campus d'Orsay - 8 Nov 18 11:00
DESCRIPTION:*** Attention : jour inhabituel ***\nConformal field theory on
top of a breathing Tonks-Girardeau gas\nPaola Ruggiero (SISSA\, Trieste\,
Italie)\nConformal field theory (CFT) has been extremely successful in des
cribing universal effects in critical one-dimensional (1D) systems\, in si
tuations in which the bulk is uniform. However\, in many experimental cont
exts\, such as quantum gases in trapping potentials and in several out-of-
equilibrium situations\, systems are strongly inhomogeneous. Recently it w
as shown that the CFT methods can be extended to deal with such 1D situati
ons [1\,2]: the system’s inhomogeneity gets reabsorbed in the parameters
of the theory\, such as the metric\, resulting in a CFT in curved space.
Here in particular we make use of CFT in curved spacetime to deal with the
out-of-equilibrium situation generated by a frequency quench in a Tonks-G
irardeau gas in a harmonic trap [3]. We show compatibility with known exac
t result and use this new method to compute new quantities\, not explicitl
y known by means of other methods\, such as the dynamical fermionic propag
ator and the one particle density matrix at different times.\n\nRefs:\n\n
[1] J. Dubail\, JM. Stéphan\, J. Viti &\; P. Calabrese\, Conformal f
ield theory for inhomogeneous one-dimensional quantum systems: the example
of non-interacting Fermi gases\, SciPost Phys. 2\, 002 (2017).\n [2] S.
Murciano\, P. Ruggiero &\; P. Calabrese\, Entanglement and relative ent
ropies for low-lying excited states in inhomogeneous one-dimensional quant
um systems\, arXiv:1810.02287\n [3] P. Ruggiero\, Y. Brun &\; J. Dubai
l\, To appear.\n
CATEGORIES:seminars
LOCATION:LPTMS\, salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay\, 15
Rue Georges Clemenceau\, Orsay\, 91405\, France
GEO:48.698185;2.181768
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=15 Rue Georges Clemenceau\,
Orsay\, 91405\, France;X-APPLE-RADIUS=100;X-TITLE=LPTMS\, salle 201\, 2è
me étage\, Bât 100\, Campus d'Orsay:geo:48.698185,2.181768
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