Meissner Effect in Superconducting Microtraps

被引：44

作者：

Cano, D. ^{[1
]}

Kasch, B. ^{[1
]}

Hattermann, H. ^{[1
]}

Kleiner, R. ^{[1
]}

Zimmermann, C. ^{[1
]}

Koelle, D. ^{[1
]}

Fortagh, J. ^{[1
]}

机构：

[1] Univ Tubingen, Inst Phys, CQ Ctr Collect Quantum Phenomena & Their Applicat, D-72076 Tubingen, Germany

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.101.183006

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the realization and characterization of a magnetic microtrap for ultracold atoms near a straight superconducting Nb wire with circular cross section. The trapped atoms are used to probe the magnetic field outside the superconducting wire. The Meissner effect shortens the distance between the trap and the wire, reduces the radial magnetic-field gradients, and lowers the trap depth. Measurements of the trap position reveal a complete exclusion of the magnetic field from the superconducting wire for temperatures lower than 6 K. As the temperature is further increased, the magnetic field partially penetrates the superconducting wire; hence the microtrap position is shifted towards the position expected for a normal-conducting wire.

引用

页数：4

共 22 条

[1] Long-range order in electronic transport through disordered metal films [J].

Aigner, S. ;

Della Pietra, L. ;

Japha, Y. ;

Entin-Wohlman, O. ;

David, T. ;

Salem, R. ;

Folman, R. ;

Schmiedmayer, J. .

SCIENCE, 2008, 319 (5867) :1226-1229

[2] MAGNETOSTATIC TRAPPING FIELDS FOR NEUTRAL ATOMS [J].

BERGEMAN, T ;

EREZ, G ;

METCALF, HJ .

PHYSICAL REVIEW A, 1987, 35 (04) :1535-1546

[3] Impact of the Meissner effect on magnetic microtraps for neutral atoms near superconducting thin films [J].

Cano, D. ;

Kasch, B. ;

Hattermann, H. ;

Koelle, D. ;

Kleiner, R. ;

Zimmermann, C. ;

Fortagh, J. .

PHYSICAL REVIEW A, 2008, 77 (06)

[4] Role of wire imperfections in micromagnetic traps for atoms -: art. no. 042629 [J].

Estève, J ;

Aussibal, C ;

Schumm, T ;

Figl, C ;

Mailly, D ;

Bouchoule, I ;

Westbrook, CI ;

Aspect, A .

PHYSICAL REVIEW A, 2004, 70 (04) :043629-1

[5] Magnetic microtraps for ultracold atoms [J].

Fortagh, Jozsef ;

Zimmermann, Claus .

REVIEWS OF MODERN PHYSICS, 2007, 79 (01) :235-289

[6] Transport of Bose-Einstein condensates with optical tweezers -: art. no. 020401 [J].

Gustavson, TL ;

Chikkatur, AP ;

Leanhardt, AE ;

Görlitz, A ;

Gupta, S ;

Pritchard, DE ;

Ketterle, W .

PHYSICAL REVIEW LETTERS, 2002, 88 (02) :4

[7] Thermally induced losses in ultra-cold atoms magnetically trapped near room-temperature surfaces [J].

Harber, DM ;

McGuirk, JM ;

Obrecht, JM ;

Cornell, EA .

JOURNAL OF LOW TEMPERATURE PHYSICS, 2003, 133 (3-4) :229-238

[8] Spin-flip lifetimes in superconducting atom chips: Bardeen-Cooper-Schrieffer versus Eliashberg theory [J].

Hohenester, Ulrich ;

Eiguren, Asier ;

Scheel, Stefan ;

Hinds, E. A. .

PHYSICAL REVIEW A, 2007, 76 (03)

[9]

JACKSON JD, 1967, CLASSICAL ELECTRODYN, pCH5

[10] Spin coupling between cold atoms and the thermal fluctuations of a metal surface [J].

Jones, MPA ;

Vale, CJ ;

Sahagun, D ;

Hall, BV ;

Hinds, EA .

PHYSICAL REVIEW LETTERS, 2003, 91 (08)

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