Jan’s Publications

@article{WOS:000438141900003,

title = {Holographic pump probe spectroscopy},

author = {A. Bagrov and B. Craps and F. Galli and V. Keranen and E. Keski-Vakkuri and J. Zaanen},

doi = {10.1007/JHEP07(2018)065},

issn = {1029-8479},

year  = {2018},

date = {2018-07-01},

journal = {JOURNAL OF HIGH ENERGY PHYSICS},

number = {7},

publisher = {SPRINGER},

address = {233 SPRING ST, NEW YORK, NY 10013 USA},

abstract = {We study the non-linear response of a 2+1 dimensional holographic model 

 with weak momentum relaxation and finite charge density to an 

 oscillatory electric field pump pulse. Following the time evolution of 

 one point functions after the pumping has ended, we find that deviations 

 from thermality are well captured within the linear response theory. For 

 electric pulses with a negligible zero frequency component the response 

 approaches the instantaneously thermalizing form typical of holographic 

 Vaidya models. We link this to the suppression of the amplitude of the 

 quasinormal mode that governs the approach to equilibrium. In the large 

 frequency limit, we are also able to show analytically that the 

 holographic geometry takes the Vaidya form. A simple toy model captures 

 these features of our holographic setup. Computing the 

 out-of-equilibrium probe optical conductivity after the pump pulse, we 

 similarly find that for high-frequency pulses the optical conductivity 

 reaches its final equilibrium value effectively instantaneously. Pulses 

 with significant DC components show exponential relaxation governed by 

 twice the frequency of the vector quasinormal mode that governs the 

 approach to equilibrium for the background solution. We explain this 

 numerical factor in terms of a simple symmetry argument.},

keywords = {Gauge-gravity correspondence; Holography and condensed matter physics   (AdS/CMT)},

pubstate = {published},

tppubtype = {article}

}

@article{WOS:000344652800002,

title = {Holographic quenches and fermionic spectral functions},

author = {N. Callebaut and B. Craps and F. Galli and D. C. Thompson and J. Vanhoof and J. Zaanen and Hongbao Zhang},

doi = {10.1007/JHEP10(2014)172},

issn = {1029-8479},

year  = {2014},

date = {2014-10-01},

journal = {JOURNAL OF HIGH ENERGY PHYSICS},

number = {10},

publisher = {SPRINGER},

address = {233 SPRING ST, NEW YORK, NY 10013 USA},

abstract = {Using holographic methods We investigate the behaviour of fermionic 

 functions of strongly coupled 2 + 1 dimensional field theories as both 

 temperature and chemical potential are quenched.},

keywords = {Gauge-gravity correspondence; Holography and condensed matter physics   (AdS/CMT)},

pubstate = {published},

tppubtype = {article}

}