Giacomo Colzi
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View article: Production of large Bose-Einstein condensates in a magnetic-shield-compatible hybrid trap
Production of large Bose-Einstein condensates in a magnetic-shield-compatible hybrid trap Open
We describe the production of large ${}^{23} \\mathrm{Na}$ Bose-Einstein\ncondensates in a hybrid trap characterized by a weak magnetic field quadrupole\nand a tightly focused infrared beam. The use of small magnetic field gradients\nmakes…
View article: Observation of Spin Superfluidity in a Bose Gas Mixture
Observation of Spin Superfluidity in a Bose Gas Mixture Open
The spin dynamics of a harmonically trapped Bose-Einstein condensed binary mixture of sodium atoms is experimentally investigated at finite temperature. In the collisional regime the motion of the thermal component is shown to be damped be…
View article: A new apparatus to simulate fundamental interactions with ultracold atoms
A new apparatus to simulate fundamental interactions with ultracold atoms Open
In this thesis I present the construction of a new apparatus aimed at studying two-component Bose-Einstein condensates (BECs) in the presence of a Rabi coupling, where the two components correspond to internal states of sodium atoms. The c…
View article: Spin-dipole oscillation and polarizability of a binary Bose-Einstein condensate near the miscible-immiscible phase transition
Spin-dipole oscillation and polarizability of a binary Bose-Einstein condensate near the miscible-immiscible phase transition Open
We report on the measurement of the spin-dipole (SD) polarizability and of the frequency of the SD oscillation of a two-component Bose-Einstein condensate of sodium atoms occupying the |32S1/2,F=1,mF=±1) hyperfine states. This binary spin …
View article: Sub-Doppler cooling of sodium atoms in gray molasses
Sub-Doppler cooling of sodium atoms in gray molasses Open
We report on the realization of sub-Doppler laser cooling of sodium atoms in gray molasses using the D1 optical transition ($3s\, ^2S_{1/2} \rightarrow 3p\, ^2P_{1/2}$) at 589.8 nm. The technique is applied to samples containing $3\times10…