Quantentechnologie

Contents 1 Introduction 1 2 Setup for Raman Sideband Cooling with Phase Noise Characterisation 2.1 The optical dipole potential 2.2 The motional groundstate 2.3 Raman Transitions 2.4 Stabilization of the Phase 2.5 Phase Noise by a Quadrature Measurement 2.6 Experimental Setup 2.7 Cooling into the ground state 2.8 Summary 3 Common Mode OpticalPhase Noise of the Optical Lattice 3.1 Experimental Setup 3.2 The Interferometer 3.3 Generation of the Beat Signal 3.4 Power Spectral Density (PSD) 3.5 Measurements and Results 3.6 Analysis of Displacements of Atoms 4 Quadrature Interferometer 4.1 Experimental test apparatus 4.2 Stability and temporal drifts 4.3 Considerations for experimental realization in SDT 4.4 Outlook 5 Conclusion and Outlook 6 Appendix 6.1 Schematic of Lead-Lag Filter in OPLL 6.2 Relation between fraction of total power below carrier and RMS phase noise 6.3 Required sensitivity for quadrature interferometer