We consider certain features of registered merging of black holes expressed in gravitation radiation. Some schemes intended to register gravitational waves by utilizing magnetostrictive effect are ...offered. The magnetic field producing by strain is amplified by SQUID with an additional circuit allows to compress field quantum fluctuations. We bring estimates of proposed sensitivity of a phased network intended for gravitational waves antenna developing.
The principle of quantum fluctuation compression with parametric control of the oscillatory system employed in ultra-high sensitivity measurements is discussed. An experiment is proposed in which a ...quantum compression mode is realized in a hysteresis-free regime with SQUID RF parametric pumping and a special microwave test signal.
The present work is considered a scheme in which by means of SQUID / magnetostrictor system serves to carry out measurements attempt Finsler parameters surrounding space.
The possibility of developing the broadband Fourier spectrometer based on the unsteady Josephson effect in HTSC, with a frequency range including the terahertz region, is considered. A simple design ...of a precisely tuned point Josephson junction is developed, which allows “fitting” of its parameters immediately under cryogenic conditions. A modification of such a spectrometer for solving the problems of factorizing multidigit numbers is proposed, which is currently one of the best known motivations of works on the quantum computer development.
It is shown that a sequence of processes is possible in ferroelectrics, analogous to those which occur when a saturated paramagnetic material is cooled under adiabatic depolarization conditions, and ...it becomes a ferromagnetic material. The conditions required to construct a dielectric calorimeter with an extremely high sensitivity of 0.04 eV/Hz
1/2
are considered.
We show that in some cases, in measurements at the level when quantum limits on accuracy begin to have an appreciable effect, we can use quantum entanglement of states in the studied system for ...extensive active suppression of background noise. We consider examples in which entanglement provides an “extra degree of freedom”, making it possible to select the desired events while rejecting the noise.
In this work, we estimate the potential of a cryogenic far IR radiation detector for registering the energy release by the amount of a substance desorbed upon its exposure to far IR quanta. The ...temperature invariability of the system at the first-order phase transition excludes the diffusion character of heat transfer processes, which contributes to the detector’s speed of operation and, according to our estimates, enables its use in pulsed location systems based on a CO
2
TEA laser. As an example of another cryogenic detector, we consider an antiferromagnetic, where the speed of operation is provided by the resonance transfer of far IR quantum energy to the spin system, the sublevels of which are split by a strong (
∼
1,000 T) exchange field. The magnetic response arising in this case is registered by a quantum magnetometer based on the Josephson effect.
It is shown that using the state-of-the-art quantum interferometer (SQUID) with the resolution 10{sup -6} {Phi}{sub 0} Hz{sup -1/2} = 2.07 Multiplication-Sign 10{sup -21} Wb Hz{sup -1/2}, coupled to ...a magnetostrictor, playing the role of tensomagnetic transducer, it is possible to construct a system for detecting pressure variations with the ultimate sensitivity of 10{sup -13} Pa Hz{sup -1/2} and for measuring specific elongation with the sensitivity of 10{sup -24} Hz{sup -1/2}. The analysis of physical grounds of the inverse magnetostriction effect demonstrates concrete ways to essentially higher efficiency of tensomagnetic conversion. The estimates performed demonstrate the possibility of using the SQUID/magnetostrictor system as a detector of gravitational waves. Other possibilities of using this system for solving both fundamental and applied problems are also considered. (experimental techniques)
Simple semiclassical model of the Drude-model type has been complemented recently by incorporation of the dependence on spatial variables. The model is rather encouraging in interpretation of novel ...high frequency effects induced by the spatial dispersion in high−Tc and ordinary superconductors. Anomalous skin effect, which is characteristic manifestation of the spatial dispersion in the microwave response of cooled conductors, is explored as a trial problem to estimate the potentialities of the model. A complex value of the surface impedance Z̃ = R + iX with the phase of π/3 and with the dependence of the module on the microwave frequency |Z̃| ∼ ω2/3 characteristic for an extremely anomalous regime is interpreted for modelling media (one-dimensional conductivity). The model describes these main features and indicates the manifestation: (i) of the spatial-resonance type effect resulting in the π/3 value of the phase and (ii) of the excitation of additional waves in metal, which explains the dependence |Z̃| ∼ ω2/3.
Features of the propagation of a pulsed magnetic disturbance in a closed superconducting slit microwave transmission line are analyzed in the context of nonlocality of an action on a quantum object. ...It is suggested that, in contrast to previously conducted experiments with photons, such an approach enables us to specify the result of nonlocality of an action in a simpler situation with only a single component of the electromagnetic radiation.
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