Superconducting Nanocircuits for Topologically Protected Qubits

For successful realization of a quantum computer, its building blocks (qubits) should be simultaneously scalable and sufficiently protected from environmental noise. Recently, a novel approach to the protection of superconducting qubits has been proposed. The idea is to prevent errors at the "hardware" level, by building a fault-free (topologically protected) logical qubit from "faulty" physical qubits with properly engineered interactions between them. It has been predicted that the decoupling of a protected logical qubit from local noises would grow exponentially with the number of physical qubits. Here we report on the proof-of-concept experiments with a prototype device which consists of twelve physical qubits made of nanoscale Josephson junctions. We observed that due to properly tuned quantum fluctuations, this qubit is protected against magnetic flux variations well beyond linear order, in agreement with theoretical predictions. These results demonstrate the feasibility of topologically protected superconducting qubits.Comment: 25 pages, 5 figure

MBST-exposure opportunities as a monotherapy of chronic dorsalgia

The aim: to analyze the clinical effect of MBST-exposure monotherapy, a magnetic resonance method, on the pain syndrome caused by degenerative dystrophic changes of vertebral column structures. Material and Methods. 132 patients both male and female with cervical and lumbar dorsopathy were enrolled into the study. Treatment course included 9 sessions of 60 min. daily. MRI-results of corresponding spine regions and visual analogue pain intensity scale were used as assessment tools for treatment efficiency before, immediately after, 3, 6 and 12 months after MBST-treatment. Results. The objective results of structural transformation of pathological formations in vertebral motional segments correlated with significant decrease of pain syndrome at all stages of control tests. Conclusion. MBST-exposure is an effective method of non-invasive, notouch monotherapy for patients with chronic dorsalgia caused by degenerative dorsopathy.</p

Magnetic Surfaces, Thin Films and Nanostructures

Kinetics and Thermodynamics at Surfaces -- Surface Crystallography -- Electronic Structure of Surfaces -- Collective and Single Particle Excitations. - Surface Magnetism -- Lattice Dynamics -- Gas Surface Interaction. - Chemical Reactions at Surfaces -- Current topics in surface scienc