Heating rate and spin flip lifetime due to near-field noise in layered superconducting atom chips

被引：16

作者：

Fermani, R. ^{[1
,2
]}

Mueller, T. ^{[1
,2
]}

Zhang, B. ^{[1
]}

Lim, M. J. ^{[1
,3
]}

Dumke, R. ^{[1
]}

机构：

[1] Nanyang Technol Univ, Div Phys & Appl Phys, Singapore 637371, Singapore

[2] Natl Univ Singapore, Ctr Quantum Technol, Singapore 117543, Singapore

[3] Rowan Univ, Dept Phys & Astron, Glassboro, NJ USA

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2010年 / 43卷 / 09期

关键词：

Copper compounds - Niobium - Superconducting films - Barium compounds - Yttrium barium copper oxides - Gold deposits;

D O I：

10.1088/0953-4075/43/9/095002

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate theoretically the heating rate and spin flip lifetimes due to near-field noise for atoms trapped close to layered superconducting structures with the superconductor in the Meissner state. In particular, we compare the case of a gold layer deposited above a superconductor with the case of a bare superconductor. We study a niobium-based and a YBa2Cu3O7-x (YBCO)-based chip. For both niobium and YBCO chips at a temperature of 4.2 K, we find that the deposition of the gold layer can have a significant impact on the heating rate and spin flip lifetime, as a result of the increase of the near-field noise. At a chip temperature of 77 K, this effect is less pronounced for the YBCO chip.

引用

页数：7

共 31 条

[1] Meissner Effect in Superconducting Microtraps [J].

Cano, D. ;

Kasch, B. ;

Hattermann, H. ;

Kleiner, R. ;

Zimmermann, C. ;

Koelle, D. ;

Fortagh, J. .

PHYSICAL REVIEW LETTERS, 2008, 101 (18)

[2] Three-dimensional quantization of the electromagnetic field in dispersive and absorbing inhomogeneous dielectrics [J].

Dung, HT ;

Knoll, L ;

Welsch, DG .

PHYSICAL REVIEW A, 1998, 57 (05) :3931-3942

[3] Microtraps for neutral atoms using superconducting structures in the critical state [J].

Emmert, A. ;

Lupascu, A. ;

Brune, M. ;

Raimond, J. -M. ;

Haroche, S. ;

Nogues, G. .

PHYSICAL REVIEW A, 2009, 80 (06)

[4] Measurement of the trapping lifetime close to a cold metallic surface on a cryogenic atom-chip [J].

Emmert, A. ;

Lupascu, A. ;

Nogues, G. ;

Brune, M. ;

Raimond, J. -M. ;

Haroche, S. .

EUROPEAN PHYSICAL JOURNAL D, 2009, 51 (02) :173-177

[5] Screening of electromagnetic field fluctuations by s-wave and d-wave superconductors [J].

Fermani, Rachele ;

Scheel, Stefan .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 2010, 43 (02)

[6]

Folman R, 2002, ADV ATOM MOL OPT PHY, V48, P263

[7] Dynamics of noise-induced heating in atom traps [J].

Gehm, ME ;

O'Hara, KM ;

Savard, TA ;

Thomas, JE .

PHYSICAL REVIEW A, 1998, 58 (05) :3914-3921

[8] 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

[9] Loss and heating of particles in small and noisy traps [J].

Henkel, C ;

Pötting, S ;

Wilkens, M .

APPLIED PHYSICS B-LASERS AND OPTICS, 1999, 69 (5-6) :379-387

[10] 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)

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