Zobrazeno 1 - 10
of 10
pro vyhledávání: '"P. I. Soininen"'
Autor:
Vladimir V. Dmitriev, Yu. M. Bunkov, J. S. Korhonen, J.H. Koivuniemi, P. I. Soininen, Matti Krusius, Ü. Parts, Mikael Fogelström, Olli V. Lounasmaa, Grigory Volovik, Y. Kondo, M. Huebner, V. M. H. Ruutu, N. B. Kopnin
Publikováno v:
Europhysics Letters (EPL). 31:449-454
Nucleation of vortices in units of one quantum has been observed with c.w. NMR in a rotating cylinder filled with 3He-B. During acceleration a new vortex is created each time the counterflow velocity at the perimeter reaches a critical value vc(T, p)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::237bcf7bd1c7ddd40cf376a9fb1c858b
https://doi.org/10.1209/0295-5075/31/8/005
https://doi.org/10.1209/0295-5075/31/8/005
Autor:
N. B. Kopnin, P. I. Soininen
Publikováno v:
Journal of Low Temperature Physics. 95:663-680
The pinning of vortices at low inductions is considered within the Ginzburg-Landau theory for both dense and sparse superconducting wire networks with periods d ≪ ξ(T)and d ⩾ ξ (T),respectively. For dense networks, the depinning current is calc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1691aff24d7fa2d498ae03a09f99d35c
https://doi.org/10.1007/bf00751792
https://doi.org/10.1007/bf00751792
Autor:
N. B. Kopnin, P. I. Soininen
Publikováno v:
Journal of Low Temperature Physics. 88:199-211
We report on first computations considering effects of a rough wall on the counterflow state in superfluid 3He-B for high flow velocities. Using the quasiclassical Green's-function formalism supplemented by the boundary conditions for a diffusive wal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d1a84f7d464ffce657aba341cc16d8d
https://doi.org/10.1007/bf00162957
https://doi.org/10.1007/bf00162957
Publikováno v:
Physica B: Condensed Matter. 178:318-330
Quantum-dynamic processes of phase slippage in3He are demonstrated to be associated with superfluid vortex nucleation, thus confirming Anderson's scenario for phase slippage through vortex generation and motion in superfluids. We also encounter more
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::816881ae7b89c802dc382504ea9be3c3
https://doi.org/10.1016/0921-4526(92)90211-a
https://doi.org/10.1016/0921-4526(92)90211-a
Publikováno v:
Physical Review B. 45:5491-5503
Quantum phase slippage in superfluid $^{3}\mathrm{He}$ flow is simulated numerically in rectangular slab geometries. Assuming that the flow is confined to a channel having horizontal surfaces close to each other, the spatial problem reduces to the tw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b7ef9f87753beae18df8ffb3a80e31b4
https://doi.org/10.1103/physrevb.45.5491
https://doi.org/10.1103/physrevb.45.5491
Publikováno v:
Europhysics Letters (EPL). 17:429-435
Time-dependent Ginzburg-Landau theory is used to compute a generalized current-phase relation for superfluid 3He flow driven by a chemical-potential difference. Our numerical simulations reveal a tendency for avalanches of vortices to appear practica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0de21a170ec2d9d77def4602cca5e143
https://doi.org/10.1209/0295-5075/17/5/009
https://doi.org/10.1209/0295-5075/17/5/009
Publikováno v:
Journal of Low Temperature Physics. 85:267-282
Parameter-free boundary conditions are discussed for the quasiclassical Green's functions at a rough wall. These conditions have a closed form: all information specific to the wall is eliminated under the assumption that the impurity layer covering t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70ad1e376e71e8c359321758868d8c8f
https://doi.org/10.1007/bf00681972
https://doi.org/10.1007/bf00681972
Publikováno v:
Europhysics Letters (EPL). 14:49-54
Computer simulations for superfluid 3He flow in two-dimensional geometries are presented. Dynamics of phase slippage in 3He is found to create quantized superfluid vortices traversing the flow; we also discover scenarios involving phase-slip lines. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0dcc88d1facbea78f211eba01750478b
https://doi.org/10.1209/0295-5075/14/1/009
https://doi.org/10.1209/0295-5075/14/1/009
Autor:
P. I. Soininen, N. B. Kopnin
Publikováno v:
Physical review. B, Condensed matter. 49(17)
The stability of uncharged superflow is studied within the Ginzburg-Landau theory. The linear-stability problem for flow in the presence of a flat wall is solved analytically. We prove that the critical velocity is not modified from its value for hom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f1330281e5e9910fd72ab9d26282d16c
https://pubmed.ncbi.nlm.nih.gov/10010083
https://pubmed.ncbi.nlm.nih.gov/10010083
Publikováno v:
Physica B: Condensed Matter. 169:535-536
We discuss the first computer simulations for superfluid vortex formation in 3He flow through narrow channels. Overall features of the phase slippage processes through vortex motion are found to be independent of details in the boundary conditions: d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::761247d368922a02db0c0c7bc1b6b3f6
https://doi.org/10.1016/0921-4526(91)90313-4
https://doi.org/10.1016/0921-4526(91)90313-4