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We discuss the notion of spin squeezing considering two mutually exclusive classes of spin-s states, namely, oriented and non-oriented states. Our analysis shows that the oriented states are not squeezed while non-oriented
states exhibit squeezing. We also present a new scheme for construction of spin-s states using 2s spinors oriented along different axes. Taking the case of s=1, we show that the ‘non-oriented’ nature and hence squeezing arise from the intrinsic quantum correlations that exist among
the spinors in the coupled state. 相似文献
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The aim of this brief report is to study the behaviour of sheath structure in a multi-component plasma with dust-neutral collisions.
The plasma consists of electrons, ions, micron size negatively charged dust particles and neutrals. The sheath-edge potential
and sheath width are calculated for collisionally dominated sheath. Comparison of collisionless and collisionally dominated
sheath are made. 相似文献
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Analysis of a TE011 mode composite sapphire-rutile dielectric resonator has been carried out to study the temperature variation of resonance
frequency, close to the Cs atomic clock hyperfine frequency of 9.192 GHz. The complementary behavior of dielectric permittivity
with temperature of the composite has been exploited to obtain the desired turning point in the resonant frequency. The frequency
of the composite structure is found to be independent of the shield diameter beyond four times the puck diameter. 相似文献
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In this paper we calculate the interfacial resistances to heat and mass transfer through a liquid-vapor interface in a binary mixture. We use two methods, the direct calculation from the actual nonequilibrium solution and integral relations, derived earlier. We verify, that integral relations, being a relatively faster and cheaper method, indeed gives the same results as the direct processing of a nonequilibrium solution. Furthermore we compare the absolute values of the interfacial resistances with the ones obtained from kinetic theory. Matching the diagonal resistances for the binary mixture we find that kinetic theory underestimates the cross coefficients. The heat of transfer is, as a consequence, correspondingly larger. 相似文献
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We propose a non-equilibrium framework for modelling the evolution of cities, which describes intra-urban migration as an irreversible diffusive process. We validate this framework using the actual migration data for the Australian capital cities. With respect to the residential relocation, the population is shown to be composed of two distinct groups, exhibiting different relocation frequencies. In the context of the developed framework, these groups can be interpreted as two components of a binary fluid mixture, each with its own diffusive relaxation time. Using this approach, we obtain long-term predictions of the cities’ spatial structures, which define their equilibrium population distribution. 相似文献
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Explicit expressions have been derived for the volume dependence of electron-phonon coupling strength (λ) and the Coulomb pseudopotential (μ*) considering the variation of Fermi momentum (κ
F) and Debye temperature (θ
D) with volume. Ashcroft’s model pseudopotential and RPA form of dielectric screening have been used for obtaining pressure
dependence of transition temperature (T
C) and the logarithmic volume derivative (Φ) of the effective interaction strength (N
0
V) for metallic glass superconductor Mg70Zn30. It has been observed that T
C of the metallic glass Mg70Zn30 decreases rapidly with increase of pressure and the superconducting phase disappears at about 30% decrease of volume, for
which the μ* curve shows a minimum and an elbow is formed in the Φ graph. 相似文献
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V. A. L'vov N. Glavatska I. Aaltio O. Söderberg I. Glavatskiy S.-P. Hannula 《The European physical journal. Special topics》2008,158(1):199-203
In the present work the contributions of the temperature-dependent (i) crystal lattice parameters (related to the magnetic
anisotropy energy), (ii) Young's modulus, (iii) saturation magnetization and (iv) thermal fluctuations of the microstress
to the temperature dependence of the magnetic field induced strain (MFIS) in Ni-Mn-Ga martensite are considered in the framework
of a statistical model. Both individual and cooperative effects of these factors on the achievable MFIS value and on the characteristic
values of the magnetic fields, which trigger and saturate MFIS, are estimated. It is shown that all the factors affect both
the achievable MFIS value and characteristic fields under the real experimental conditions, and none of them can be neglected
in the quantitative theoretical analysis of the experimental strain-field dependencies obtained for different temperature
values. In addition, the influence of specimen shape on the characteristic fields is illustrated for different temperature
values. For the available experimental dependencies (i)–(iii) and the reasonable set of model parameters the switching magnetic
field proved to be equal to 160 kA/m when the temperature was by 15 K below the martensite start temperature and raised to
320 kA/m when the temperature was by 45 K below the martensite start temperature. Obtained results agree with the experimental
data reported by O. Heczko and L. Straka, in J. Appl. Phys. 94, 7139 (2003). 相似文献
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