\n**Abstract:**<
/div>\n \\n\\n
END:VEVENT
BEGIN:VEVENT
UID:ai1ec-645@web.infn.it/www-pr
DTSTAMP:20220930T205152Z
CATEGORIES;LANGUAGE=it-IT:Seminario
CONTACT:
DESCRIPTION:Speaker: Prof.ssa Agnese Bissi\nUppsala University\nTitolo: Dis
continuities in CFTs.\nAbstract: In this talk I will discuss the role of d
iscontinuities in the context of the conformal bootstrap. In particular I
will introduce\na dispersion relation for conformal field theories which a
llows us to find operator product expansion coefficients\nin any conformal
field theory. If time allows I will present how to apply the same strateg
y to the case of conformal field theories\nwith boundaries.
DTSTART;TZID=Europe/Rome:20191029T143000
DTEND;TZID=Europe/Rome:20191029T153000
LOCATION:Aula Bohr - Plesso Fisica @ Parma\, Campus
SEQUENCE:0
SUMMARY:Seminario A. Bissi
URL:https://web.infn.it/www-pr/evento/seminario-a-bissi/
X-COST-TYPE:free
X-ALT-DESC;FMTTYPE=text/html:\\n\\n\\n \\n\\n
END:VEVENT
BEGIN:VEVENT
UID:ai1ec-648@web.infn.it/www-pr
DTSTAMP:20220930T205152Z
CATEGORIES;LANGUAGE=it-IT:Seminario
CONTACT:
DESCRIPTION:Prof. Carlos Viviescas\nUniversidad Nacional de Colombia\nterrà
due lezioni su\nNon-equilibrium thermodynamics of\nmicroscopic systems\nP
rogram:\nPart 1. Fluctuation theorems and entropy production\nA basic intr
oduction to non-equilibrium thermodynamics of physical systems is presente
d\, together with the fundamental concepts and ideas necessary for the und
erstanding of the production of entropy and the formulation of classical f
luctuation theorems. In the last part\, basic elements of quantum mechanic
s necessary for a formulation of equivalent quantum fluctuation theorems a
re offered.\nPart 2. Continuously measured open quantum systems\nThe basic
s ideas behind the dynamics of quantum systems weakly coupled to an enviro
nment are introduced\, and a description of the system’s Markovian evoluti
on is offered. Emphasis is then put to systems for which the environment i
s coupled to detectors that are continuously monitored\, in order to intro
duce an intuitive formulation of quantum trajectories for the system.\nPar
t 3. Work\, heat\, and weak measurements\nWe use the quantum trajectory fo
rmalism to construct a framework for the study of the non-equilibrium ther
modynamics of weakly measured quantum systems\, showing how to recover qua
ntum fluctuation theorems. In this framework\, we conclude by showing how
the concepts of work and heat can be related with the ways the weak measur
ements are performed.\n19 novembre 2019 14:30-16:30\n20 novembre 2019 16:3
0-18:00\nAula Rutherford\n
DTSTART;TZID=Europe/Rome:20191119T143000
DTEND;TZID=Europe/Rome:20191119T163000
LOCATION:Aula Rutherford Dipartimento di Scienze Matematiche\, Fisiche e In
formatiche @ Campus - Parma
SEQUENCE:0
SUMMARY:ciclo seminari Prof. C. Viviescas
URL:https://web.infn.it/www-pr/evento/ciclo-seminari-prof-c-viviescas/
X-COST-TYPE:free
X-ALT-DESC;FMTTYPE=text/html:\\n\\n\\n \\n\\n
END:VEVENT
BEGIN:VEVENT
UID:ai1ec-654@web.infn.it/www-pr
DTSTAMP:20220930T205152Z
CATEGORIES;LANGUAGE=it-IT:Seminario
CONTACT:
DESCRIPTION:Tim Zimmermann\nInstitute of Theoretical Physics Heidelberg Uni
versity\nTitolo: Numerical methods for solving the Schrödinger-Poisson equ
ation\nAbstract:\nI discuss methods to find solutions of the Poisson equat
ion in 1+1 spacetime\ndimensions. In particular\, I will focus on our rece
ntly implemented technique based on a split-step operator evolution discus
sing its efficiency in memory and cpu time.\nMercoledì 20 novembre 2019\no
re 16:30\nAula Feynman
DTSTART;TZID=Europe/Rome:20191120T163000
DTEND;TZID=Europe/Rome:20191120T173000
LOCATION:Sala Feynman - Plesso Fisica
SEQUENCE:0
SUMMARY:Seminario Tim Zimmermann
URL:https://web.infn.it/www-pr/evento/seminario-tim-zimmermann/
X-COST-TYPE:free
X-ALT-DESC;FMTTYPE=text/html:\\n\\n\\n \\n\\n
END:VEVENT
BEGIN:VEVENT
UID:ai1ec-651@web.infn.it/www-pr
DTSTAMP:20220930T205152Z
CATEGORIES;LANGUAGE=it-IT:Seminario
CONTACT:
DESCRIPTION:Surjeet Rajendrani (Johns Hopkins University)\nTitle: Relaxatio
n of the Cosmological Constant\nAbstract: We present a model that naturall
y tunes a large positive cosmological constant to a small cosmological con
stant. A slowly rolling scalar ﬁeld decreases the cosmological constant to
a small negative value\, causing the universe to contract\, thus reheatin
g it. An expanding universe with a small positive cosmological constant ca
n be obtained\, respectively\, by coupling this solution to any model of a
cosmological bounce and coupling the scalar ﬁeld to a sector that undergo
es a technically natural phase transition at the meV scale. A robust predi
ction of this model is a rolling scalar ﬁeld today with some coupling to t
he standard model. This can potentially be experimentally probed in a vari
ety of cosmological and terrestrial experiments\, such as probes of the eq
uation of state of dark energy\, birefringence in the cosmic microwave bac
kground and terrestrial tests of Lorentz violation.
DTSTART;TZID=Europe/Rome:20191129T143000
DTEND;TZID=Europe/Rome:20191129T153000
LOCATION:Sala Feynman - Plesso Fisica
SEQUENCE:0
SUMMARY:Seminario Surjeet Rajendrani
URL:https://web.infn.it/www-pr/evento/seminario-surjeet-rajendrani/
X-COST-TYPE:free
X-ALT-DESC;FMTTYPE=text/html:\\n\\n\\n \\n\\n
END:VEVENT
BEGIN:VEVENT
UID:ai1ec-652@web.infn.it/www-pr
DTSTAMP:20220930T205152Z
CATEGORIES;LANGUAGE=it-IT:Seminario
CONTACT:
DESCRIPTION:Valentina Giangreco M. Puletti\nUniversity of Iceland – Reykjav
k (Iceland)\nTitle: Entanglement measures in generalised quantum Lifshitz
modelsAbstract:\nI will discuss the computation of entanglement measures i
n\ngeneralised quantum Lifshitz models. These are free field\ntheories wit
h Lifshitz scaling symmetry which extend the (2+1)-\ndimensional quantum L
ifshitz model to higher dimensions\, and\nprovide us with simple models fo
r non-relativistic critical\ntheories. I will introduce entanglement entro
py and logarithmic\nnegativity (which are entanglement measures suitable f
or systems\nin a pure and mixed state respectively)\, outline their\ncompu
tation in generalised quantum Lifshitz theories\, and\ncompare the results
with the conformal case.
DTSTART;TZID=Europe/Rome:20191210T163000
DTEND;TZID=Europe/Rome:20191210T173000
LOCATION:Aula Bohr - Plesso Fisica
SEQUENCE:0
SUMMARY:Seminario V.G.M. Puletti
URL:https://web.infn.it/www-pr/evento/seminario-v-g-m-puletti/
X-COST-TYPE:free
X-ALT-DESC;FMTTYPE=text/html:\\n\\n\\n \\n\\n

Dr. Alessandro Codello

\nDepartment of Physics \, Southern University of Science and Technology\, Shenzhen – China

\n< /div>\nMartedi’ 15 ottobre ore 16.30 Plesso di Matematica\, Aula Riu
nioni

\nMercoledi’ 16 ottobre ore 16.30 Plesso di Matematica\,
Aula Riunioni

\nGiovedi’ 17 ottobre 14.30 Plesso di Matematica\,
Aula D

\n\n\n\n

END:VEVENT
BEGIN:VEVENT
UID:ai1ec-644@web.infn.it/www-pr
DTSTAMP:20220930T205152Z
CATEGORIES;LANGUAGE=it-IT:Seminario
CONTACT:
DESCRIPTION:
DTSTART;TZID=Europe/Rome:20191024T163000
DTEND;TZID=Europe/Rome:20191024T173000
LOCATION:Plesso di Matematica\, Aula Riunioni @ Parma Campus
SEQUENCE:0
SUMMARY:lezione aggiuntiva di A.Codello
URL:https://web.infn.it/www-pr/evento/lezione-aggiuntiva-di-a-codello/
X-COST-TYPE:free
X-ALT-DESC;FMTTYPE=text/html:\\n\\n\\nThis short series of lectures introduces Functional Ren
ormalization Group methods\, both perturbative and non-perturbative\, and
applies them to the study of Universality Classes of Critical Phenomena in
arbitrary dimension.

\nThe course will also show (with explicit
computations) the power and simplifications that the “functional constrai
nt” offers in performing a wide array of Quantum Field Theory computations
and is thus recommend to Master and PhD students in Theoretical Physics.<
/div>\n\n**LECTURES:**\n

\n- \n
- Intro duction: Universality and Renormalization Group methods \n
- Function al Perturbative RG: Universality in the epsilon-expansion \n
- Functi onal Non-Perturbative RG: Wetterich Equation and Scaling Solutions \n< li>Multi-component world: towards a classification of Universality Classes in arbitrary dimension\n

Speaker: Prof.ssa Agnese Bissi

\nUppsala University\n

Titolo: Discontinuities in CFTs.

\nAbstract: In this talk I w
ill discuss the role of discontinuities in the context of the conformal bo
otstrap. In particular I will introduce

\na dispersion relation for c
onformal field theories which allows us to find operator product expansion
coefficients

\nin any conformal field theory. If time allows I will
present how to apply the same strategy to the case of conformal field theo
ries

\nwith boundaries.

Prof. **Carlos Viviescas**

\nUniversidad
Nacional de Colombia

terrà due lezioni su

\n**Non-equil
ibrium thermodynamics of**

\n**microscopic systems\nProgram:\nPart 1. **

\nThe basics id eas behind the dynamics of quantum systems weakly coupled to an environmen t are introduced\, and a description of the system’s Markovian evolution i s offered. Emphasis is then put to systems for which the environment is co upled to detectors that are continuously monitored\, in order to introduce an intuitive formulation of quantum trajectories for the system.

\nP art 3.

\nWe use the quantum trajectory formalism to construct a framework for the study of the non-equilibrium thermodynamics of weakly measured quantum systems\, s howing how to recover quantum fluctuation theorems. In this framework\, we conclude by showing how the concepts of work and heat can be related with the ways the weak measurements are performed.

19 novembre 2019 14
:30-16:30

\n20 novembre 2019 16:30-18:00

Aula Rutherford

\n\n

**Tim Zimmermann**

\nInstitute of Theoret
ical Physics Heidelberg University

Titolo: **Numerical metho
ds for solving the Schrödinger-Poisson equation**

Abstract:

\nI discuss methods to find solutions of the Poisson equation in 1+1
spacetime

\ndimensions. In particular\, I will focus on our recently
implemented technique based on a split-step operator evolution discussing
its efficiency in memory and cpu time.

Mercoledì 20 novembre 2019

\nore 16:30

\nAula Feynman

**Surjeet Rajendrani** (Johns Hopkins Universi
ty)

Title: **Relaxation of the Cosmological Constant**

Abstract: We present a model that naturally tunes a large positi ve cosmological constant to a small cosmological constant. A slowly rollin g scalar ﬁeld decreases the cosmological constant to a small negative valu e\, causing the universe to contract\, thus reheating it. An expanding uni verse with a small positive cosmological constant can be obtained\, respec tively\, by coupling this solution to any model of a cosmological bounce a nd coupling the scalar ﬁeld to a sector that undergoes a technically natur al phase transition at the meV scale. A robust prediction of this model is a rolling scalar ﬁeld today with some coupling to the standard model. Thi s can potentially be experimentally probed in a variety of cosmological an d terrestrial experiments\, such as probes of the equation of state of dar k energy\, birefringence in the cosmic microwave background and terrestria l tests of Lorentz violation.

\n**Valentina Giangreco M. Puletti**

Uni versity of Iceland – Reykjavk (Iceland)

\nTitle: **Entanglemen
t measures in generalised quantum Lifshitz models**Abstract:

\nI will discuss the computation of entanglement measures in

\ngenera
lised quantum Lifshitz models. These are free field

\ntheories with L
ifshitz scaling symmetry which extend the (2+1)-

\ndimensional quantu
m Lifshitz model to higher dimensions\, and

\nprovide us with simple
models for non-relativistic critical

\ntheories. I will introduce ent
anglement entropy and logarithmic

\nnegativity (which are entanglemen
t measures suitable for systems

\nin a pure and mixed state respectiv
ely)\, outline their

\ncomputation in generalised quantum Lifshitz th
eories\, and

\ncompare the results with the conformal case.