Výsledky vyhledávání - "Ruutu, V. M."

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Composite defect extends cosmology - 3He analogy

Autor: Eltsov, V. B., Kibble, T. W. B., Krusius, M., Ruutu, V. M. H., Volovik, G. E.

Publikováno v: Phys.Rev.Lett.85:4739-4742,2000

Spin-mass vortices have been observed to form in rotating superfluid 3He-B following the absorption of a thermal neutron and a rapid transition from the normal to superfluid state. The spin-mass vortex is a composite defect which consists of a planar

Externí odkaz: http://arxiv.org/abs/cond-mat/0007369

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Coexistence of Single and Double-Quantum Vortex Lines

Autor: Parts, Ü., Avilov, V. V., Koivuniemi, J. H., Kopnin, N. B., Krusius, M., Ruohio, J. J., Ruutu, V. M. H.

We discuss the configurations in which singly and doubly quantized vortex lines may coexist in a rotating superfluid. General principles of energy minimization lead to the conclusion that in equilibrium the two vortex species segregate within a cylin

Externí odkaz: http://arxiv.org/abs/cond-mat/9905356

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Critical Velocity of Vortex Nucleation in Rotating Superfluid 3He-A

Autor: Ruutu, V. M. H., Kopu, J., Krusius, M., Parts, Ü., Placais, B., Thuneberg, E. V., Xu, W.

Publikováno v: Phys. Rev. Lett. 79, 5058 (1997)

We have measured the critical velocity v_c at which 3He-A in a rotating cylinder becomes unstable against the formation of quantized vortex lines with continuous (singularity-free) core structure. We find that v_c is distributed between a maximum and

Externí odkaz: http://arxiv.org/abs/cond-mat/9708226

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Defect Formation in Quench-Cooled Superfluid Phase Transition

Autor: Ruutu, V. M., Eltsov, V. B., Krusius, M., Makhlin, Yu. G., Placais, B., Volovik, G. E.

Publikováno v: Phys. Rev. Lett. 80 (1998) 1465

We use neutron absorption in rotating 3He-B to heat locally a 10 micrometer-size volume into normal phase. When the heated region cools back in microseconds, vortex lines are formed. We record with NMR the number of lines as a function of superflow v

Externí odkaz: http://arxiv.org/abs/cond-mat/9706038

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Stable Spin Precession at one Half of Equilibrium Magnetization in Superfluid 3He-B

Autor: Dmitriev, V. V., Kosarev, I. V., Krusius, M., Ponarin, D. V., Ruutu, V. M. H., Volovik, G. E.

Publikováno v: Phys. Rev. Lett. 78 (1997) 86

New stable modes of spin precession have been observed in superfluid 3He-B. These dynamical order parameter states include precession with a magnetization S=pS_{eq} which is different from the equilibrium value S_{eq}. We have identified modes with p

Externí odkaz: http://arxiv.org/abs/cond-mat/9606221

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Big bang simulation in superfluid 3He-B -- Vortex nucleation in neutron-irradiated superflow

Autor: Ruutu, V. M. H., Eltsov, V. B., Gill, A. J., Kibble, T. W. B., Krusius, M., Makhlin, Yu. G., Placais, B., Volovik, G. E., Xu, Wen

Publikováno v: Nature 382 (1996) 334

We report the observation of vortex formation upon the absorption of a thermal neutron in a rotating container of superfluid $^3$He-B. The nuclear reaction n + $^3$He = p + $^3$H + 0.76MeV heats a cigar shaped region of the superfluid into the normal

Externí odkaz: http://arxiv.org/abs/cond-mat/9512117

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Coexistence of single and double quantum vortex lines

Autor: Parts, Ü., Avilov, V., Koivuniemi, J. H., Kopnin, N. B., Krusius, M., Ruohio, J. J., Ruutu, V. M. H.

Publikováno v: Physical Review B, Vol. 62, No. 9, pp. 5865-5876, 1 September 2000-I

We discuss the configurations in which singly and doubly quantized vortex lines coexist in a rotating superfluid. General principles of energy minimization lead to the conclusion that in equilibrium the two vortex species segregate within a cylindric

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4577::591583237caca13d78e476db46f719b0
https://www.hzdr.de/publications/Publ-3569-1

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