0198506961.pdf
206 Laser cooling and trapping Fig. 9.19The intensities of the com- ponents of theJ=1/2toJ=3/ 2 transition are represented bya,b ...
9.7 The Sisyphus cooling technique 207 to repeatedly roll a stone to the top of a hill.^5656 In addition to Sisyphus cooling, Da ...
208 Laser cooling and trapping (^61) Broadly speaking, in Sisyphus cool- of velocities. 61 ing the force averages to zero for at ...
9.8 Raman transitions 209 2 1 Fig. 9.20A Raman transition between levels 1 and 2 driven by two laser beams of (angular) frequenc ...
210 Laser cooling and trapping τpulse= 600μs selectively transfers atoms in a range of width ∆v 1mms−^1. Thisisaboutthirtytimes ...
9.9 An atomic fountain 211 0 0 (a) (b) (c) (d) 2 1 0 0 More atoms in range Fig. 9.21One step in the sequence of operations in Ra ...
212 Laser cooling and trapping periods of time; however, the trapping potential strongly perturbs the atomic energy levels and h ...
9.10 Conclusions 213 temperature is the same in both cases.^8080 These caesium atoms have a veloc- ity spread of about 3vr 10 mm ...
214 Laser cooling and trapping et al. (1999). Various internet resources and popular descriptions can be found on the web site o ...
Exercises for Chapter 9 215 estimate∂F/∂vand hence to determine the damping coefficientαforanatominapairof counter-propagating l ...
216 Laser cooling and trapping L 0 =0.25 cm for constant deceleration at half the maximum value. Use this simple model of a trap ...
Exercises for Chapter 9 217 some of the nitty-gritty details and tests under- standing of hyperfine structure.^86 (a) Sodium has ...
Magnetic trapping, evaporative cooling and Bose–Einstein condensation 10 10.1 Principle of magnetic trapping 218 10.2 Magnetic t ...
10.1 Principle of magnetic trapping 219 The energydepends only the magnitude of the fieldB=|B|.Theenergy does not vary with the ...
220 Magnetic trapping, evaporative cooling and Bose–Einstein condensation 10.2 Magnetic trapping 10.2.1 Confinement in the radia ...
10.2 Magnetic trapping 221 (a) (b) Fig. 10.2(a) A cross-section through the magnetic potential (eqn 10.8) in a radial direction, ...
222 Magnetic trapping, evaporative cooling and Bose–Einstein condensation Pinch coils Ioffe coils Compensation coils Fig. 10.3An ...
10.2 Magnetic trapping 223 radial confinement for atoms in low-field-seeking states. To confine these atoms in the axial directi ...
224 Magnetic trapping, evaporative cooling and Bose–Einstein condensation field has the form Bpinch(z)=Bpinch(0) + d^2 Bz dz^2 z ...
10.3 Evaporative cooling 225 (a) (b) (c) (d) (e) Fig. 10.6(a) A schematic representa- tion of atoms confined in a harmonic poten ...
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