population relaxation timegedanken experimentThe prerequisite of quantum measurement is a transformation of an initially off-diagonal density matrix ρmα;nβ describing an interacting measured object and measuring device into a diagonal density matrix ρmα;mαδmnδαβ . The latter density matrix ...
The typical dephasing time is shown to strongly depend on the quantum dot size whereas the electron phonon ``coupling strength'' and external electric fields tend mostly to effect the residual coherence. The relevance of the dephasing times for current quantum information processing implementation ...
We show that the methods for quantification of system-environment entanglement that were recently developed for interactions that lead to pure decoherence of the system can be straightforwardly generalized to time-dependent Hamiltonians of the same type. This includes the if-and-only-if criteria of...
Early-Time Dynamics of the Photoexcited Hydrated Electron The comparison of two pulse photon echo experiments on pure water and on hydrated electrons allows us to measure the pure dephasing time of ~1.6 fs. ... A Baltu?Ka,MF Emde,MS Pshenichnikov,... - 《Journal of Physical Chemistry A》...
Non-markovian finite-temperature two-time correlation functions of system operators of a pure-dephasing model. Physical Review A, 82(1):012111, 2010. :Goan, H., Chen, P., Jian, C.: Non-Markovian finite temperature two-time correlation functions of system operators: beyond the quantum ...
Pure electron-electron dephasingWe have successfully grown ultrathin continuous aluminum film by molecular beam epitaxy. This percolative aluminum film is single crystalline and strain free as characterized by transmission electron microscopy and atomic force microscopy. The weak anti-localization effect is ...
Time domain investigation on vibrational dephasing and spectral diffusion in CO-doped solid N2 Infrared picosecond accumulated photon echo experiments have been performed for the first time, using the Orsay Free Electron Laser, on the v = 0-->v = 1 t......
Pure dephasing time of spherical semiconductor quantum dot is calculated.Optical phonon mode dominates the pure dephasing process.Pure dephasing time nonlinearly increases with decreasing phonon coupling.Pure dephasing time of large quantum dots is more sensitive on temperature....
A model is developed for calculatinq the pure-dephasing (T2) contribution to overtone lineshapes in isolated molecules. The linewidth is attributed to time-dependent fluctuations in the frequency of the overtone transition, resulting from the vibrational motions in the molecule, and no transfer of ...
The off-diagonal spin decoherence results due to hybridization of local QD exciton spin with magnons from surrounding crystal–we estimate the corresponding time-scale and formulate a general rule for the scaling of dephasing time versus QD diameter derived within the Green function approach (© ...