Informal Workshop on Statistical Field Theory and related topics

On October 9 and 10 (Friday and Saturday) SISSA will host an informal meeting on “statistical field theory and related topics”, with the following (updated) program and list of talks.

The meeting will be held in room 005 (ground floor) of SISSA main building.

Everybody is cordially invited to participate.

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Post-doctoral position. Opening

There is a one-year post-doctoral position (that can be extended for another year) in the Statistical Physics Group at SISSA starting no later than 1st November 2016. The position is offered by Istituto Nazionale di Fisica Nucleare (INFN) with the annual gross salary of 40.000 E. Travel tickets to and from SISSA will be reimbursed at the beginning and at the end of the fellowship. Also lunch tickets will be provided for working days.

Please, notice that the selection will be done by INFN selection committee and not by SISSA faculty.

Application, in electronic form, must be sent to INFN no later than November 15th, 2015, through the website:

http://www.ac.infn.it/personale/theo_fellowships/priv/index2.php?inf=modulo

The applications must specify the research topic (Statistical Field Theory) and SISSA as INFN site, and must include
1) CV
2) publication list
3) at least 3 reference letters.

For any further information, please consult the website:

http://www.ac.infn.it/personale/theo_fellowships/

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PhD Defenses 2015

The first session of the PhD defenses for the academic year 2014/2015 will take place on Monday, October 12th 2015 in room 128 with the following schedule:

  • 9:30-10:30, Andrea Coser: Aspects of Entanglement Negativity in One Dimensional Critical Systems
  • 10:30-11:00, Coffee break
  • 11:00-12:00, Alessio Squarcini: Phase Separation and Interfaces – Exact Results

The second session will take place on Friday, November 27th 2015 in room 128 with the following schedule:

  • 9:30-10:30, Francesca Pietracaprina: Investigating Localization Transitions with the Forward Approximation
  • 10:30-11:00, Coffee break
  • 11:00-12:00, Mauro Schiulaz: Ideal quantum glasses – Many body localization without disorder?
  • Everybody is warmly invited to attend!

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PhD Entrance Exam: Results

The list of eligible candidates for the PhD student positions for the 2015/2016 academic year is available.

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PhD Positions

Applications are invited for up to five doctoral positions with the SISSA Statistical Physics Group, starting in autumn 2015. See the official announcements page or the flyer for additional information.

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Postdoc Positions

MPS
Applications are invited for two postdoctoral positions with the SISSA Statistical Physics Group, starting in autumn 2017.
The positions have a total duration of two years and are in the general area of quantum field theory and statistical physics.

A complete description of the research interests of the group and of the current members can be found here:
http://www.sissa.it/statistical/

The deadline for applications is February 1st 2017, but we encourage earlier applications.

Applications (which should include a CV with list of publications, a brief research statement, and the names of at least two referees) should be done via the Academic Jobs Online Service https://academicjobsonline.org/ajo/jobs/8681

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Phd defense

The PhD thesis defense of Dr. Pietro Smacchia will take place on Friday, July 11th, 2014.
Title: “Out of equilibrium many-body systems: adiabaticity, statistics of observables and dynamical phase transitions”.
Room: Aula Cinema 1st floor SISSA
Time: 11:00 a.m.

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Journal Club

Friday, January 31th, there will be a Statistical Physics Journal Club at 11:00 in room 138. Valentina Ros will talk about the two references:

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Informal Statistical Physics Seminar

Friday, 15 November – 17:00 Room 138, SISSA (Santorio building)

Silvia Chiacchiera (University of Coimbra): Collective modes of Fermi gases in realistic 3D and 2D traps

Abstract: Usually theoretical calculations for the collective modes of trapped cold gases are performed in harmonic traps. However, experimental trap potentials have typically a Gaussian shape and anharmonicity effects appear as the temperature and, in the case of Fermions, the filling of the trap are increased. These effects are not only quantitative, but also qualitative. Consider the sloshing (Kohn) mode, a center-of-mass oscillation of the cloud: in a harmonic trap it is undamped and takes place at the trap frequency, whatever the statistics, temperature, number of particles and interaction strength are (Kohn theorem). However, in an anharmonic trap its frequency is shifted and it acquires a damping, both effects depending on the system parameters. Since the sloshing mode is often used as a tool to determine with high precision the trap frequency, and as a reference for the other modes, it is fundamental to understand its properties. For the other modes, anharmonicity implies also a frequency shift and a different damping, and its effect cannot be reproduced in an accurate way by a simple rescaling.

In this seminar I will present two studies performed in the framework of the Boltzmann equation including in-medium effects and solved approximately via the phase-space moments method extended beyond lowest order: the sloshing mode in a 3D trap and the quadrupole mode in a 2D trap, for which experimental data are available. The calculated frequency shifts and damping rates of the sloshing mode in 3D are in very good agreement with the experimental data. On the other side, the computed damping of the quadrupole mode in 2D is smaller than the observed one, even in the weakly interacting and non-interacting regime, where our picture is more reliable. We try to model the experimental procedure as close as possible, but none of the many effects considered solves the puzzle.

References:

[1] P.-A. Pantel, D. Davesne, S. Chiacchiera, and M. Urban, Trap anharmonicity and sloshing mode of a Fermi gas, Phys. Rev. A 86, 023635 (2012).

[2] S. Chiacchiera, D. Davesne, T.Enss, and M. Urban, Damping of the quadrupole mode in a two-dimensional Fermi gas, Phys. Rev. A, Phys. Rev. A 88, 053616 (2013).

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PhD defenses 2013

The PhD defense for the academic year 2012/2013 will take place on Wednesday, October 30th 2013 in room 128 with the following schedule:

  • 9:00-10:00, Matteo Marcuzzi: A study on non-equilibrium dynamics in classical and quantum systems
  • 10:00-11:00, Jamir Marino: Thermalization dynamics of quantum spin chains
  • 11:00-11:30, coffee break
  • 11:30-12:30, Marco Beria: Numerical methods for quantum systems with infinite-dimensional space of states: two examples, two approaches
  • 14:00-15:00, Luca Caniparoli: Statistical physics approaches to protein translation
  • 15:00-16:00, Giancarlo De Luca: Decision making in complex environments: an adaptive network approach

Everybody is warmly invited to attend!

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