Found 3 result(s)

### 06.03.2019 (Wednesday)

#### Schwinger-Keldysh effective field theories

Triangular Seminar Natalia Pinzani Fokeeva (KU Leuven)

 at: 15:00 ICroom Blackett LT2 abstract: I will discuss novel effective field theories for hydrodynamics. After identifying the relevant low-energy degrees of freedom, I will show how the symmetries of the problem can be efficiently implemented using supersymmetry. Interestingly, a conserved entropy current naturally arises as a Noether current in superspace. If time permits, I will also show how to derive such effective actions from holography.

### 06.03.2019 (Wednesday)

#### tba

Triangular Seminar Natalia Pinzani Fokeeva (KU Leuven)

 at: 15:00 ICroom tba abstract:

### 26.11.2014 (Wednesday)

#### Effective actions for fluids from holography and the membrane paradigm

Regular Seminar Natalia Pinzani Fokeeva (Amsterdam)

 at: 14:00 ICroom H503 abstract: It is widely believed that hydrodynamics is the low energy effective theory of any quantum field theory. In this talk I will derive the local low energy effective action for uncharged dissipationless conformal fluids through holography. This can be achieved by solving a double-Dirichlet problem for linearised gravitational perturbations between the conformal boundary of a (4+1)-dimensional AdS-black brane background and a stretched horizon. Interestingly dissipationless fluid dynamics is captured by Goldstone bosons of the broken symmetries by the classical solution ending on the second boundary. I will discuss how the effective action approach might be inconsistent unless there is a coupling to a dissipative dynamical IR sector which for simplicity can be replaced by a membrane paradigm-like boundary condition on a stretched horizon and I will also comment on the limits of validity of this simplification.