Édgar Roldán group

  • Stochastic Thermodynamics and Biophysics

  • Welcome to our site

google academic link rg-wh

 

Stochastic thermodynamics of active systems

 

The ICTP: where the world meets
www.ictp.it

Physics in Trieste

We work at the International Centre for Theoretical Physics (ICTP, Trieste, Italy), within the Quantitative Life Sciences section. 

Our main research interests are stochastic thermodynamics,  biophysics and active matter.
We investigate the thermodynamic properties of processes that take place in the microscopic world, where the dynamics is strongly affected by thermal fluctuations. Our work on non-equilibrium thermodynamics provides novel insights on the fluctuations of biological processes that occur at mesoscopic scales, such as RNA transcription, and spontaneous otoacoustic emissions. We have participated in the construction of colloidal heat engines and information engines using optical tweezers.

Key research interests:

  • Stochastic thermodynamics and Martingales: We investigate universal properties of stochastic heat, work and entropy production for systems described by few non-equilibrium degrees of freedom. We employ martingale theory, widely used in finance and mathematics, to describe the fluctuating nature of thermodynamic fluxes at the mesoscale.
  • Biophysics:  We study the fluctuating motion of RNA polymerases during transcriptional pauses using the framework of stochastic resetting.
  • Active matter: Using tools from stochastic thermodynamics, we investigate non-equilibrium signatures of life in spontaneous oscillations of hair cells in the ear of the bullfrog.
  • Stochastic processesWe develop theory describing stopping-time (e.g. first-passage time) and extreme-value statistics of correlated stochastic processes.
  • Experimental construction of heat engines : We study the energetic fluxes of colloidal heat engines and use our theory to inspire novel designs of artificial nanomachines ( comprehensive review )

We work in collaboration with researchers from different continents, including those in developing countries:  SISSA (Trieste, Italy), Max Planck Institute for the Physics of Complex Systems (MPI-PKS, Dresden, Germany), the PICO-group (Aalto University, Finland); Biotechnology Center (BIOTEC, Dresden, Germany); Vodafone Chair of Mobile Communication Systems (Dresden, Germany); Okinawa Institute for Science and Technology (OIST, Okinawa, Japan); Institut Curie (Paris, France), Universite de Nice (Nice, France); Ramakrishna Mission Vivekananda University (Kolkata, India); Universidad Complutense (Madrid, Spain).

We welcome applications of outstanding, independent and highly-motivated Msc/PhD students and postdoctoral researchers with their own funding sources. We strongly support applications from women researchers. For inquiries about research opportunities please contact me:  edgar(at)ictp(dot)it

Key recent publications:

G. Manzano, R. Fazio and É. Roldán, Physical Review Letters 122, 220602 (2019)
R. Chetrite, S. Gupta, I. Neri and É. Roldán, EPL 124,60006 (2018) – Editor’s Choice
S. Singh et al., Physical Review Letters 122, 230602 (2019)
S. Pigolotti, I. Neri, É. Roldán and F. Jülicher, Physical Review Letters 119 (14), 140604 (2017)
I. Neri, É. Roldán, and F. Jülicher, Physical Review X 7 , 011019 (2017)
I. A. Martínez, É. Roldán, L. Dinis, and R. A. Rica.  Soft Matter 13 (1), 22-36 (2017)

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