Drastically suppressing the error of ballistic readout of qubits

The thermal jitter of transmission of magnetic flux quanta in long Josephson junctions is studied. While for large-to-critical damping and small values of bias current the physically obvious dependence of the jitter versus length $\sigma\sim\sqrt{L}$ is confirmed, for small damping starting from the experimentally relevant $\alpha=0.03$ and below strong deviation from $\sigma\sim\sqrt{L}$ is observed, up to nearly complete independence of the jitter versus length, which is exciting from fundamental point of view, but also intriguing from the point of view of possible applications.Comment: 4 pages, 6 figure

Efficiency of electron cooling in cold-electron bolometers with traps

Electron on-chip cooling from the base temperature of 300 mK is very important for highly sensitive detectors operating in space due to problems of dilution fridges at low gravity. Electron cooling is also important for ground-based telescopes equipped with 3He cryostats being able to function at any operating angle. This work is aimed at the investigation of electron cooling in the low -temperature range. New samples of cold-electron bolometers with traps and hybrid superconducting/ferromagnetic absorbers have shown a temperature reduction of the electrons in the refrigerator junctions from 300 to 82 mK, from 200 to 33 mK, and from 100 to 25 mK in the idle regime without optical power load. The electron temperature was determined by solving heat balance equa-tions with account of the leakage current, sixth power of temperature in the whole temperature range, and the Andreev current using numerical methods and an automatic fit algorithm

Numerical modeling of a multi-frequency receiving system based on an array of dipole antennas for LSPE-SWIPE

Here we present the results of a numerical modeling of mode composition in the constriction of the Large Scale Polarization Explorer-Short-Wavelength Instrument for the Polarization Explorer (LSPE-SWIPE) back-to-back horn. These results are used for calculating the frequency response of arrays of planar dipole antennas with cold-electron bolometers for 145, 210, and 240 GHz frequencies. For the main frequency channel (i.e., 145 GHz) we have a 45 GHz bandwidth. For the auxiliary frequency channels (i.e., 210 and 240 GHz) placed on the same substrate, we have bandwidths of 26 and 38 GHz, respectively. We performed some op-timizations for cold-electron bolometers to achieve a photon noise-equivalent power of 1.1 x 10-16 W/Hz1/2. This was achieved by replacing one of two superconductor-insulator-normal tunnel junctions with a superconductor-normal metal contact

Метгемоглобинемия, ассоциированная с приемом бензокаина. Клинический случай

The article describes a clinical case of the development of a severe, life-threatening methemoglobinemia in a patient with a dystrophic form of congenital epidermolysis bullosa while receiving a drug containing benzocaine. The current data on classification, pathogenesis, clinical course and methods for treating this state has been presented. Many substances and drugs that are methemoglobin formers are widespread and can cause chronic methemoglobinemia. Acute severe methemoglobinemia is accompanied by life-threatening organ disorders. In some cases, it may be difficult to diagnose methemoglobinemia due to the polymorphism of the clinical picture, the need for laboratory confirmation of the diagnosis, which may be underperformed in the absence of adequate alertness. The presented clinical case will be useful for doctors of various specialties.В статье представлено описание клинического случая развития тяжелой, угрожающей жизни метгемоглобинемии у пациента с дистрофической формой врожденного буллезного эпидермолиза на фоне приема препарата, содержащего бензокаин. Приведены современные данные о классификации, патогенезе, клиническом течении и способах терапии указанного состояния. Многие вещества и лекарства, являющиеся метгемоглобинобразователями, широко распространены и могут вызывать хроническую метгемоглобинемию. Острая тяжелая метгемоглобинемия сопровождается угрожающими жизни органными нарушениями. Диагностика метгемоглобинемии в ряде случаев может быть затруднена в силу полиморфизма клинической картины, необходимости лабораторного подтверждения диагноза, которое может быть не выполнено в случае отсутствия должной настороженности. Представленный клинический случай будет полезен для врачей различных специальностей

Implementation of differential scanning calorimetry when studying polymerization of compounds based on glycolic acid ether

Using differential scanning calorimetry and synchronous thermal analysis under dynamic conditions, kinetic regularities of copolymerization of α- glycolide and a mixture of α-β-glycolide with D,L-lactide in the presence of stannous octoate as a catalyst have been investigated. Some thermodynamic and kinetic parameters of cationic copolymerization of monomers have been determined

Implementation of differential scanning calorimetry when studying polymerization of compounds based on glycolic acid ether

Using differential scanning calorimetry and synchronous thermal analysis under dynamic conditions, kinetic regularities of copolymerization of α- glycolide and a mixture of α-β-glycolide with D,L-lactide in the presence of stannous octoate as a catalyst have been investigated. Some thermodynamic and kinetic parameters of cationic copolymerization of monomers have been determined