Partial dephasing in interacting many-particle systems and current echo

Autor:	R. Zimmermann, Erich Runge, Siegfried Sauter-Fischer
Rok vydání:	1998
Předmět:	Particle system Physics Coupling (physics) Amplitude Dephasing Quantum mechanics Echo (computing) Limit (mathematics) Current (fluid) Voltage
Zdroj:	Physical Review B. 57:4299-4303
ISSN:	1095-3795 0163-1829
DOI:	10.1103/physrevb.57.4299
Popis:	Current echos as a response to a sequence of two ultrashort voltage pulses and their delay dependence are studied for interacting particles. The echo amplitude is reduced compared to its noninteracting counterpart, and decays even without an external bath coupling. However, it ends up with a nonzero value in the large-delay limit. This partial dephasing can be traced back to correlated energy differences in the many-body system. It is expected for all echo phenomena in small isolated systems. The time-dependent Hartree-Fock approximation fails to describe the current echo’s dephasing even qualitatively. @S0163-1829~98!02307-8#
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::91eebda69b31ec836f5a850aa39538e0 https://doi.org/10.1103/physrevb.57.4299 Zobrazit plný text záznamu