Kehrein, Stefan K.

[["dc.bibliographiccitation.artnumber","190601"],["dc.bibliographiccitation.issue","19"],["dc.bibliographiccitation.journal","Physical Review Letters"],["dc.bibliographiccitation.volume","108"],["dc.contributor.author","Heyl, M."],["dc.contributor.author","Kehrein, Stefan"],["dc.date.accessioned","2018-11-07T09:10:30Z"],["dc.date.available","2018-11-07T09:10:30Z"],["dc.date.issued","2012"],["dc.description.abstract","We show that work distributions and nonequilibrium work fluctuation theorems can be measured in optical spectra for a wide class of quantum systems. We consider systems where the absorption or emission of a photon corresponds to the sudden switch on or off of a local perturbation. For the particular case of a weak local perturbation, the Crooks relation establishes a universal relation in absorption as well as in emission spectra. Because of a direct relation between the spectra and work distribution functions this is equivalent to universal relations in work distributions for weak local quenches. As two concrete examples we treat the x-ray edge problem and the Kondo exciton."],["dc.identifier.doi","10.1103/PhysRevLett.108.190601"],["dc.identifier.isi","000303662500001"],["dc.identifier.pmid","23003018"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/26504"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Physical Soc"],["dc.relation.issn","1079-7114"],["dc.relation.issn","0031-9007"],["dc.title","Crooks Relation in Optical Spectra: Universality in Work Distributions for Weak Local Quenches"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","135704"],["dc.bibliographiccitation.issue","13"],["dc.bibliographiccitation.journal","Physical Review Letters"],["dc.bibliographiccitation.volume","110"],["dc.contributor.author","Heyl, M."],["dc.contributor.author","Polkovnikov, A."],["dc.contributor.author","Kehrein, Stefan"],["dc.date.accessioned","2018-11-07T09:26:57Z"],["dc.date.available","2018-11-07T09:26:57Z"],["dc.date.issued","2013"],["dc.description.abstract","A phase transition indicates a sudden change in the properties of a large system. For temperature-driven phase transitions this is related to nonanalytic behavior of the free energy density at the critical temperature: The knowledge of the free energy density in one phase is insufficient to predict the properties of the other phase. In this Letter we show that a close analogue of this behavior can occur in the real time evolution of quantum systems, namely nonanalytic behavior at a critical time. We denote such behavior a dynamical phase transition and explore its properties in the transverse-field Ising model. Specifically, we show that the equilibrium quantum phase transition and the dynamical phase transition in this model are intimately related. DOI: 10.1103/PhysRevLett.110.135704"],["dc.identifier.doi","10.1103/PhysRevLett.110.135704"],["dc.identifier.isi","000316800000012"],["dc.identifier.pmid","23581343"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/30423"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Physical Soc"],["dc.relation.issn","1079-7114"],["dc.relation.issn","0031-9007"],["dc.title","Dynamical Quantum Phase Transitions in the Transverse-Field Ising Model"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","155413"],["dc.bibliographiccitation.issue","15"],["dc.bibliographiccitation.journal","PHYSICAL REVIEW B"],["dc.bibliographiccitation.volume","85"],["dc.contributor.author","Heyl, M."],["dc.contributor.author","Kehrein, Stefan"],["dc.date.accessioned","2018-11-07T09:11:15Z"],["dc.date.available","2018-11-07T09:11:15Z"],["dc.date.issued","2012"],["dc.description.abstract","In this work we investigate the x-ray edge singularity problem realized in noninteracting quantum dots. We analytically calculate the exponent of the singularity in the absorption spectrum near the threshold and extend known analytical results to the whole parameter regime of local level detunings. Additionally, we highlight the connections to work distributions and to the Loschmidt echo."],["dc.identifier.doi","10.1103/PhysRevB.85.155413"],["dc.identifier.isi","302402600010"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/26677"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Physical Soc"],["dc.relation.issn","1098-0121"],["dc.title","X-ray edge singularity in optical spectra of quantum dots"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]