نتایج جستجو برای: delocalization index
تعداد نتایج: 398868 فیلتر نتایج به سال:
We present a framework in which the transition between many-body localized (MBL) phase and an ergodic one is symmetry breaking. consider random Floquet spin chains, expressing their averaged spectral form factor (SFF) as function of time terms transfer matrix that acts space direction. The SFF determined by leading eigenvalues this matrix. In MBL phase, eigenvalue unique, symmetry-unbroken whil...
We investigate signatures of a self-trapping transition in the driven-dissipative Bose Hubbard dimer, presence incoherent pump and single-particle losses. For fully symmetric couplings stationary state density matrix is independent any Hamiltonian parameter, cannot therefore capture competition between hopping-induced delocalization interaction-dominated regime. focus instead on exact quantum d...
Ellipsometric measurements in a wide spectral range (from 0.05 to 6.5 eV) have been carried out on the organic semiconducting polymer, poly[2-methoxy-5-(3',7'-dimethyloctyloxy)-1,4-phenylene-vinylene] (MDMO-PPV), in both undoped and doped states. The real and imaginary parts of the dielectric function and the refractive index are determined accurately, provided that the layer thickness is measu...
The delocalization of the photoexcited triplet state in a linear butadiyne-linked porphyrin dimer is investigated by time-resolved and pulse electron paramagnetic resonance (EPR) with laser excitation. The transient EPR spectra of the photoexcited triplet states of the porphyrin monomer and dimer are characterized by significantly different spin polarizations and an increase of the zero-field s...
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