In the invited talk I discussed the primary relaxation process of a photo excited charge carrier coupled to quantum Einstein phonons. If the pump pulse is sufficiently strong, the system relaxes after the primary energy redistribution towards a steady state. Then, the one-particle density matrix relevant for charge degrees of freedom along with the optical conductivity take up the form of their thermal counterparts. Our results indicate that steady states are (quasi)thermal and the temperature can be read out from the optical conductivity. Therefore, secondary relaxation processes observed in time resolved ultrafast spectroscopy can be efficiently described by applying (quasi)thermal approaches, e.g., the many-temperature models.
B.04 Guest lecture
COBISS.SI-ID: 2822756In this invited talk, we presented the results of agent-based modeling and simulations of stochastic processes of knowledge creation through questions and answers in online social communications. The process of interactions between agents takes place in a growing bipartite network and observes the logical integration of cognitive elements that encode the content of the question as well as the expertise of individual agents.
B.04 Guest lecture
COBISS.SI-ID: 28692775V tem vabljenem predavanju sem poročal o združenem teoretično-eksperimentalnem delu kjer smo daleč stran od ravnovesja, proučevali kvazi-kondenzacijo bozonov s trdo sredico pri neničelni vrednosti valovnega vektorja. Red dolgega dosega se v večdelčnih kvantnih sistemih ponavadi opazi v ravnovesju. V našem delu smo, za razliko od tega standardnega koncepta, opazili dolgoživeči red dolgega dosega, ki se je razvil spontano v neravnovesju. Za opazovanje tega pojava smo pripravili nehomogeno začetno stanje, kjer smo na sredini sicer prazne enodimenzionalne optične mreže ujeli bozone v Mottov izolator. Ko smo zunanji potencial nenadoma odstranili, so se bozoni začeli širiti na prazni del mreže ter spontano razvili korelacije dolgega dosega. To dinamično generirano stanje se razlikuje od reda dolgega dosega v osnovnem stanju, saj ima značilne vrhove pri neničelnih vrednostih +/- Pi/2 v porazdelitvi valovnih vektorjev.
B.04 Guest lecture
COBISS.SI-ID: 29079847Zala Lenarčič was a recipient of the Loreal Women in Science 2015 award for her PhD thesis.
E.02 International awards
COBISS.SI-ID: 2819428