Abstract Stimulated Raman adiabatic passage is a well-known technique for quantum population transfer due to its robustness again various sources of noises. Here we consider from one spin another via an intermediate which under dephasing noise. We obtain analytic expression the efficiency specific driving protocol, showing that could reduce efficiency, but effect also be suppressed with stronge...

We address the use of neural networks (NNs) in classifying environmental parameters single-qubit dephasing channels. In particular, we investigate performance linear perceptrons and two nonlinear NN architectures. At variance with time-series-based approaches, our goal is to learn a discretized probability distribution over using tomographic data at just random instants time. consider channels ...

Exceptional points emerge in the complex eigenspectra of non-Hermitian systems, and give rise to rich critical behaviors. An outstanding example is chiral state transfer, where states can swap under an adiabatic encircling around exceptional point, but only along one direction. In dissipative quantum such exceptional-point encirclings are often accompanied by decoherence, whose impact beyond de...

Introduction: Magnetic resonance imaging has increasingly become the method of choice to assess trabecular bone architecture in vivo non-invasively and without ionizing radiation to evaluate the progression of osteoporosis. This is commonly done by quantitative analysis of bone structural properties from high-resolution MR images. In this work, we hypothesized that measurements of interand intr...

The charge fluctuations of two nearby mesoscopic conductors coupled only via the long range Coulomb force are discussed and used to find the dephasing rate which one conductor exerts on the other. The discussion is based on a formulation of the scattering approach for charge densities and the density response to a fluctuating potential. Coupling to the Poisson equation results in an electricall...

We study high-field spin transport in a quantum wire using a semiclassical approach. Spin dephasing (or spin depolarization) in the wire is caused by D’yakonov-Perel’ relaxation associated with bulk inversion asymmetry (Dresselhaus spin-orbit coupling) and structural inversion asymmetry (Rashba spin-orbit coupling). The depolarization rate is found to depend strongly on the initial polarization...

We investigate the phase coherence time of weakly interacting tunneling systems (TSs). We show that all neighbors of a given TS form together with the TS of interest an entangled cluster as long as the linewidth of the excitation of the neighbor is smaller than its interaction energy with the TS of interest. Thus, the relaxation of all neighbors in the cluster contributes to the dephasing of th...