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排序方式: 共有76条查询结果,搜索用时 31 毫秒
11.
Summary We present here the calculation of the expression for the surface tension depression by taking into consideration the finite
size of the molecular superfluid helium. The agreement between the experimental results (J. R. Eckardt, D. O. Edwards, S.
Y. Shen and F. M. Gasparini:Phys. Rev. B,16, 1944 (1977)) and the theoretical results is much better than previously published (K. R. Atkins:Can. J. Phys.,31, 1165 (1953)). 相似文献
12.
D. Blume Chris H. Greene 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2002,18(1):83-86
We analyze various microscopic calculations of vibrational frequencies for 4HeN clusters, N = 3-728. The lowest breathing frequency with total angular momentum J = 0 varies smoothly as a function of N, with a maximum around N = 50-120.
Received 11 July 2001 相似文献
13.
K N Shrivastava 《Pramana》1985,25(4):491-496
We find that in the spin-polarized hydrogen, Bose condensation occurs for certain quantized values of the magnetic field.
Once the field is fixed, sweeping of the radio-frequency results in nuclear magnetic resonance so that condensation and NMR
occur simultaneously. We have found that nuclear self-induced transparency occurs. A new excitation designated by the present
author as superboojum, which is a discontinuity in the hydrodynamic equations in spin-polarized hydrogen having finite nuclear
as well as electronic spin is discovered. 相似文献
14.
Summary The paired-phonon analysis for boson mixtures is employed in conjunction with the hypernetted-chain approximation to study
the ground-state properties of an impurity embedded in liquid4He. Chemical potentials, volume coefficients and other thermodynamic quantities as well as some of the most interesting optimal
correlation functions are calculated for various impurities interacting with the4He background atoms via Lennard-Jones potentials of differing strength.
To speed up publication, the authors of this paper have agreed to not receive the proofs for correction. 相似文献
15.
MI Ai-Jun ZUO Wei LI Zeng-Hua Umberto Lombardo 《理论物理通讯》2009,51(6):1113-1116
The 3 P F2 superfluidity of neutron and proton is investigated in isospin-asymmetric nuclear matter within the Brueckner-Hartree-Fock approach and the BCS theory by adopting the Argonne V14 and the Argonne V18 nucleonnucleon interactions. We find that pairing gaps in the 3PF2 channel predicted by adopting the AV14 interaction are much larger than those by the AV18 interaction. As the isospin-asymmetry increases, the neutron 3 pF2 superfluidity is found to increase rapidly, whereas the proton one turns out to decrease and may even vanish at high enough asymmetries. As a consequence, the neutron 3pF2 superfluidity is much stronger than the proton one at high asymmetries and it predominates over the proton one in dense neutron-rich matter. 相似文献
16.
A. Maeyens J. Tempere 《The European Physical Journal B - Condensed Matter and Complex Systems》2007,58(3):231-236
We consider a superconducting material that exists in the liquid state, more
precisely, in which the Meissner-Ochsenfeld effect persists in the liquid
state. First, we investigate how the shape of such a hypothetical Meissner
liquid will adapt to accomodate for an applied external field. In particular,
we analyse the case of a droplet of Meissner fluid, and compute the elongation
of the droplet and its quadrupole frequency as a function of the applied
field. Next, the influence of an applied field on the flow of the liquid is
studied for the case of a surface wave. We derive the dispersion relation for
surface waves on an incompressible Meissner fluid. We discuss some candidate
realizations of the Meissner fluids and for the case of a superconducting
colloid discuss which regime of wave lengths would be most affected by the
Meissner effect. 相似文献
17.
Giorgio Careri 《Physics in Perspective (PIP)》2000,2(2):204-210
Lars Onsager was known for his obscure but correct predictions in several fields of science. Some scientific events, particularly
in the field of superfluidity, are recollected here by one of his old friends. 相似文献
18.
M. Kellogg J.P. Eisenstein L.N. Pfeiffer K.W. West 《Physica E: Low-dimensional Systems and Nanostructures》2006,34(1-2):6
Single-layer longitudinal and Hall resistances have been measured in a bilayer two-dimensional electron system at νT=1 with equal but oppositely directed currents flowing in the two layers. At small effective layer separation and low temperature, the bilayer system enters an interlayer coherent state expected to exhibit superfluid properties. We detect this nascent superfluidity through the vanishing of both resistances as the temperature is reduced. This corresponds to the counterflow conductivity rising rapidly as the temperature falls, reaching by . This supports the prediction that the ground state of this system is an excitonic superfluid. 相似文献
19.
20.
David C. Roberts 《Contemporary Physics》2013,54(3):453-461
The article considers the dramatic phenomenon of seemingly frictionless flow of slow-moving superfluids. Specifically the question of whether an object in a superfluid flow experiences any drag force is addressed. A brief account is given of the history of this problem and it is argued that recent advances in ultracold atomic physics can shed much new light on this problem. The article presents the commonly held notion that sufficiently slow-moving superfluids can flow without drag and also discusses research suggesting that scattering quantum fluctuations might cause drag in a superfluid moving at any speed. 相似文献