Collisional shifts in optical-lattice atom clocks

被引：9

作者：

Band, Y. B. ^{[1
]}

Vardi, A.

机构：

[1] Ben Gurion Univ Negev, Dept Chem, IL-84105 Beer Sheva, Israel

[2] Natl Inst Stand & Technol, Atom Phys Div, Gaithersburg, MD 20899 USA

[3] Ben Gurion Univ Negev, Ilse Katz Ctr Nanosci, IL-84105 Beer Sheva, Israel

来源：

PHYSICAL REVIEW A | 2006年 / 74卷 / 03期

关键词：

D O I：

10.1103/PhysRevA.74.033807

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We theoretically study the effects of elastic collisions on the determination of frequency standards via Ramsey-fringe spectroscopy in optical-lattice atom clocks. Interparticle interactions of bosonic atoms in multiply occupied lattice sites can cause a linear frequency shift, as well as generate asymmetric Ramsey-fringe patterns and reduce fringe visibility due to interparticle entanglement. We propose a method of reducing these collisional effects in an optical lattice by introducing a phase difference of pi between the Ramsey driving fields in adjacent sites. This configuration suppresses site-to-site hopping due to interference of two tunneling pathways, without degrading fringe visibility. Consequently, the probability of double occupancy is reduced, leading to cancellation of collisional shifts.

引用

页数：10

共 33 条

[1] Dynamics of a two-mode Bose-Einstein condensate beyond mean-field theory [J].

Anglin, JR ;

Vardi, A .

PHYSICAL REVIEW A, 2001, 64 (01) :9

[2] Direct excitation of the forbidden clock transition in neutral 174Yb atoms confined to an optical lattice [J].

Barber, ZW ;

Hoyt, CW ;

Oates, CW ;

Hollberg, L ;

Taichenachev, AV ;

Yudin, VI .

PHYSICAL REVIEW LETTERS, 2006, 96 (08)

[3] Caesium atomic clocks: function, performance and applications [J].

Bauch, A .

MEASUREMENT SCIENCE AND TECHNOLOGY, 2003, 14 (08) :1159-1173

[4] Frequency standards and frequency measurement [J].

Bauch, A ;

Telle, HR .

REPORTS ON PROGRESS IN PHYSICS, 2002, 65 (05) :789-843

[5]

BAUCH A, 1989, P 4 S FREQ STAND MET, P370

[6] Hyperpolarizability effects in a Sr optical lattice clock [J].

Brusch, A ;

Le Targat, R ;

Baillard, X ;

Fouché, M ;

Lemonde, P .

PHYSICAL REVIEW LETTERS, 2006, 96 (10)

[7]

Carmichael H., 1993, Lecture Notes in Physics Monographs, V18

[8] Controlling dipole-dipole frequency shifts in a lattice-based optical atomic clock [J].

Chang, DE ;

Ye, J ;

Lukin, MD .

PHYSICAL REVIEW A, 2004, 69 (02) :10

[9] Frequency standards, metrology and fundamental constants [J].

Conroy, RS .

CONTEMPORARY PHYSICS, 2003, 44 (02) :99-135

[10] THE EFFECT OF COLLISIONS UPON THE DOPPLER WIDTH OF SPECTRAL LINES [J].

DICKE, RH .

PHYSICAL REVIEW, 1953, 89 (02) :472-473

← 1 2 3 4 →