Vortex generation induced by low-frequency wire vibration in superfluid 3He-B

Yusuke Nago, M. Inui, R. Kado, K. Obara, H. Yano, O. Ishikawa, T. Hata

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We report the generation of a quantized vortex in superfluid 3He-B. Oscillating objects can generate vortices due to breaking of Cooper pairs in superfluid He, resulting that the threshold velocity for vortex generation is higher than the pair-breaking velocity. Using very-low-frequency vibrating wires with smooth surfaces, however, we find that the threshold velocity of vortex generation is lower than the pair-breaking velocity. The threshold velocity remains constant with decreasing 3He pressure until the pair-breaking velocity equals the vortex-generation threshold velocity at a low pressure. These results indicate that another mechanism that is independent of pressure generates vortices for the low-frequency vibrating wire in superfluid 3He. The threshold velocity observed in experiments turns out to be nearly equal to the velocity of the instability of the vortex lines attached to the wire, which is characterized by only the circulation quantum.

Original languageEnglish
Article number224511
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume82
Issue number22
DOIs
Publication statusPublished - 2010 Dec 14

Fingerprint

vortex generators
Vortex flow
wire
Wire
low frequencies
vibration
thresholds
vortices
very low frequencies
low pressure

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Vortex generation induced by low-frequency wire vibration in superfluid 3He-B. / Nago, Yusuke; Inui, M.; Kado, R.; Obara, K.; Yano, H.; Ishikawa, O.; Hata, T.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 82, No. 22, 224511, 14.12.2010.

Research output: Contribution to journalArticle

Nago, Yusuke ; Inui, M. ; Kado, R. ; Obara, K. ; Yano, H. ; Ishikawa, O. ; Hata, T. / Vortex generation induced by low-frequency wire vibration in superfluid 3He-B. In: Physical Review B - Condensed Matter and Materials Physics. 2010 ; Vol. 82, No. 22.
@article{f2047364ad2a4d3796aacf1ceab94bd9,
title = "Vortex generation induced by low-frequency wire vibration in superfluid 3He-B",
abstract = "We report the generation of a quantized vortex in superfluid 3He-B. Oscillating objects can generate vortices due to breaking of Cooper pairs in superfluid He, resulting that the threshold velocity for vortex generation is higher than the pair-breaking velocity. Using very-low-frequency vibrating wires with smooth surfaces, however, we find that the threshold velocity of vortex generation is lower than the pair-breaking velocity. The threshold velocity remains constant with decreasing 3He pressure until the pair-breaking velocity equals the vortex-generation threshold velocity at a low pressure. These results indicate that another mechanism that is independent of pressure generates vortices for the low-frequency vibrating wire in superfluid 3He. The threshold velocity observed in experiments turns out to be nearly equal to the velocity of the instability of the vortex lines attached to the wire, which is characterized by only the circulation quantum.",
author = "Yusuke Nago and M. Inui and R. Kado and K. Obara and H. Yano and O. Ishikawa and T. Hata",
year = "2010",
month = "12",
day = "14",
doi = "10.1103/PhysRevB.82.224511",
language = "English",
volume = "82",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "22",

}

TY - JOUR

T1 - Vortex generation induced by low-frequency wire vibration in superfluid 3He-B

AU - Nago, Yusuke

AU - Inui, M.

AU - Kado, R.

AU - Obara, K.

AU - Yano, H.

AU - Ishikawa, O.

AU - Hata, T.

PY - 2010/12/14

Y1 - 2010/12/14

N2 - We report the generation of a quantized vortex in superfluid 3He-B. Oscillating objects can generate vortices due to breaking of Cooper pairs in superfluid He, resulting that the threshold velocity for vortex generation is higher than the pair-breaking velocity. Using very-low-frequency vibrating wires with smooth surfaces, however, we find that the threshold velocity of vortex generation is lower than the pair-breaking velocity. The threshold velocity remains constant with decreasing 3He pressure until the pair-breaking velocity equals the vortex-generation threshold velocity at a low pressure. These results indicate that another mechanism that is independent of pressure generates vortices for the low-frequency vibrating wire in superfluid 3He. The threshold velocity observed in experiments turns out to be nearly equal to the velocity of the instability of the vortex lines attached to the wire, which is characterized by only the circulation quantum.

AB - We report the generation of a quantized vortex in superfluid 3He-B. Oscillating objects can generate vortices due to breaking of Cooper pairs in superfluid He, resulting that the threshold velocity for vortex generation is higher than the pair-breaking velocity. Using very-low-frequency vibrating wires with smooth surfaces, however, we find that the threshold velocity of vortex generation is lower than the pair-breaking velocity. The threshold velocity remains constant with decreasing 3He pressure until the pair-breaking velocity equals the vortex-generation threshold velocity at a low pressure. These results indicate that another mechanism that is independent of pressure generates vortices for the low-frequency vibrating wire in superfluid 3He. The threshold velocity observed in experiments turns out to be nearly equal to the velocity of the instability of the vortex lines attached to the wire, which is characterized by only the circulation quantum.

UR - http://www.scopus.com/inward/record.url?scp=78650895554&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78650895554&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.82.224511

DO - 10.1103/PhysRevB.82.224511

M3 - Article

AN - SCOPUS:78650895554

VL - 82

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 22

M1 - 224511

ER -