

Prof. Doron Cohen
Department of Physics
BenGurion University
BeerSheva 84105, Israel
dcohen@bgu.ac.il


פרופ' דורון כהן
המחלקה לפיסיקה
אוניברסיטת בן גוריון
באר שבע
086477557


19871991 PhD, Technion, Israel Institute of Technology, Haifa, Israel.
19911996 R&D activity ( IAF, MOD, RAFAEL, SCD).
19961998 The Weizmann Institute of Science, Rehovot, Israel.
19982001 Harvard University, Cambridge, MA, USA.
20019999 BenGurion University, BeerSheva, Israel. [more information]
NonEquilbrium steady state

Superfluidity in atomtronic circuits

Atomtronics (PhysRev highlight)

The Bososnic Josephson Junction

Semilinear rate of energy absorption

Quantum Dissipation (Wikipedia)

Stochastic Spreading: the Zeno effect

Moving walls

Quantum Stirring

Diffractive spreading

Tasks:

Chairperson of the physics department (2018...)

BGU Senate member (2016...)

Head of the physics computation committee (20022019)

Head of the physics teaching committee (20042011)

Chief judge at the court of appeals (20172018)

Misc committees (appointments, graduateschool,...)
Courses:
Research Interests:

Chaos and quantum mechanics ("Quantum Chaos").

Stochastic versus Coherent dynamics.

Dissipative dynamics, Brownian motion, Sinai spreading, Relaxation.

Dynamics of condensed particles, BoseHubbard (BH) model.

Theory of superfluidity in low dimensional BH circuits.

Theory of driven mesoscopic (nano) systems.

Adiabatic and nonadiabatic transport.

Pumping and stirring of particles in closed geometries.

Beyond linear response: energy absorption; mesoscopic conductance.

Theory of dissipation and quantum irreversibility.

Random Matrix Theory (RMT) modelling of semiclassical systems.
Recent research activity:
Our recent studies consider minimal quantum models (a) with classical particles that perform random walk in disordered environment; (b) with quantum Bose particles whose dynamics is coherent. Four PhD students were involved in those projects during the last 3 years. In the first category we can bring as an example our study of relaxation of currents in one dimensional rings, taking into account percolation and localization properties of the model [SciReports 2016], where we fuse together themes that came from the works of SinaiDerrida and HatanoNelson. Lately we have extended the study to active networks with topological stochastic disorder [PRE 2018]. In the second category we highlight our quantumchaos theory for superfludity of onedimensional bosonic gas in a ring lattice [SciReports 2015, PRB 2017], for which we also addressed the feasibility of SQUID operation [NJP 2016] and InsulatorSuperfluid resonances [Editor's Suggestion PRA 2017]. Recently we have made a paradigm shift, introducing the concept of adiabatic passage through chaos [PRL 2018], with application to nonlinear STIRAP. On the one hand we are interested in stability issues, e.g. our recent work shows how Monodromy and Chaos combine to explain the stability of a condensates in optical lattices [PRA 2019]; while on the other hand we have interest in thermalization [NJP 2015], introducing a semiclassical theory for manybody dynamical localization in extremely small systems [PRE 2018]. A full list of publications (by subject) is appended below.


