Experimental Setup For Two-Component Bec On Atom Chip

Study of phase evolution in 87Rb Bose-Einstein condensate
Mikhail Egorov October 8, 2009

Contents
1 Bose-Einstein concretion 1.1 Introduction . . . . . . . . 1.2 U-wire trap . . . . . . . . 1.3 Z-wire trap . . . . . . . . 1.4 Gravitational sag . . . . . 1.5 The mite chip . . . . . . 1.6 Optical pumping . . . . . 1.7 Evaporative cooling . . . 1.8 Experimental succession . . 1.9 Bose-Einstein Condensate and atom chips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 2 3 5 6 6 7 7 8 10 10 11 11 13

2 visualise system 2.1 Absorption imaging . . . . . . . . . . 2.2 Imaging system jut . . . . . . . . . 2.3 Improving optical resolution . . . . . . 2.4 Reducing linewidth of the probe laser

3 Microwave spectroscopy 15 3.1 Microwave setup . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.2 Single photon zap spectroscopy . . . . . . . . . . . . . . .



15 3.3 Two photon microwave spectroscopy . . . . . . . . . . . . . . . . 18 4 Experiments with BEC 20 4.1 Ramsey spectroscopy in two percentage 87 Rb BEC . . . . . . . . 20 4.2 telling number of atoms squeezing in two component BEC . . . 21 4.3 Absolute number of atoms squeezing in two component BEC . . 22

1

Chapter 1

Bose-Einstein condensation and atom chips
1.1 Introduction

Development of magneto-optical traps in the 1980s do possible producing clouds with temperatures of tens of µK. Combining this technique with magnetic traps and evaporative cooling made possible producing Bose-Einstein condensates (BECs) [1]. BEC...If you want to get a full essay, order it on our website: Orderessay



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