Simultaneous Loading of $^{87}$ Rb and $^{85}$ Rb into a Optical Trap from a MOTSimultaneous Loading of $^{87}$Rb and $^{85}$Rb into a Optical Trap from a MOT

Anthony Gorges, David French, Jacob Roberts

Bulletin of the American Physical SocietyJun 6, 20070 citations

An Optical Trap for $^{85}$ Rb and $^{87}$ RbAn Optical Trap for $^{85}$Rb and $^{87}$Rb

Juan Miguel Rey Pino, Scott B. Papp, Carl Wieman

Bulletin of the American Physical SocietyMay 18, 20050 citations

Inter-isotope effects in optimal dual-isotope loading into a shallow optical trap

M S Hamilton, A R Gorges, J L Roberts

Examination of loading the isotopes $^{85}$ Rb and $^{87}$ Rb simultaneously into a shallow far-off-resonance trap (FORT) has revealed an unexpected decrease in maximum atom number loaded as compared to loading either isotope alone. The simultaneous loading of the FORT will be affected by additional homonuclear and heteronuclear light-assisted collisional losses. However, these losses are measured and found to be insufficient to explain the observed drop in total number of atoms loaded into the FORT. We find that our observations are consistent with a decrease in loading rate caused by inter-isotope disruptions of the efficient laser cooling required to load atoms into the optical trap.Examination of loading the isotopes $^{85}$Rb and $^{87}$Rb simultaneously into a shallow far-off-resonance trap (FORT) has revealed an unexpected decrease in maximum atom number loaded as compared to loading either isotope alone. The simultaneous loading of the FORT will be affected by additional homonuclear and heteronuclear light-assisted collisional losses. However, these losses are measured and found to be insufficient to explain the observed drop in total number of atoms loaded into the FORT. We find that our observations are consistent with a decrease in loading rate caused by inter-isotope disruptions of the efficient laser cooling required to load atoms into the optical trap.

arXiv:1202.2165Journal of Physics B Atomic Molecular and Optical PhysicsApr 19, 20127 citations

$^{87}$ Rb in a double well optical lattice$^{87}$Rb in a double well optical lattice

Ian B. Spielman, Chad Fertig, J. H. Huckans +2 more

Bulletin of the American Physical SocietyMar 23, 20050 citations

Quantum optics of a laser-cooled atomic point sample

Daniel J. Heinzen, J. D. Miller, M. R. Matthews +1 more

A small number of atoms that are confined to dimensions on the order of an optical wavelength are expected to exhibit novel collective behavior, including superradiance, subradiance, and unusual photon statistics and spatial correlations. We have identified a technique by which such a wavelength-sized atomic point sample may be realized in the laboratory. Atoms that are strongly confined in an optical dipole-force potential may be laser-cooled via stimulated and spontaneous Raman transitions between ground state atomic sublevels. Because the ac Stark shift of the two lower state sublevels is the same, the atoms may be cooled and trapped simultaneously. Also, interatomic radiation pressure and collisional effects can be kept to a minimum in a dipole force trap. We are currently pursuing such experiments using laser-cooled Rb atoms. We have successfully loaded laser-cooled Rb into a dipole force trap and have also driven the stimulated Raman transitions between the Rb ground state sublevels. We will report on our experimental progress and discuss their application to fundamental investigations in quantum optics.A small number of atoms that are confined to dimensions on the order of an optical wavelength are expected to exhibit novel collective behavior, including superradiance, subradiance, and unusual photon statistics and spatial correlations. We have identified a technique by which such a wavelength-sized atomic point sample may be realized in the laboratory. Atoms that are strongly confined in an optical dipole-force potential may be laser-cooled via stimulated and spontaneous Raman transitions between ground state atomic sublevels. Because the ac Stark shift of the two lower state sublevels is the same, the atoms may be cooled and trapped simultaneously. Also, interatomic radiation pressure and collisional effects can be kept to a minimum in a dipole force trap. We are currently pursuing such experiments using laser-cooled Rb atoms. We have successfully loaded laser-cooled Rb into a dipole force trap and have also driven the stimulated Raman transitions between the Rb ground state sublevels. We will report on our experimental progress and discuss their application to fundamental investigations in quantum optics.

Annual Meeting Optical Society of AmericaJan 1, 19920 citations

Photoionization loss in simultaneous magneto-optical trapping of Rb and Sr

T. Aoki, Yuki Yamanaka, Makoto Takeuchi +2 more

We demonstrate the simultaneous magneto-optical trapping (MOT) of Rb and Sr and examine the characteristic loss of Rb in the MOT due to photoionization by the cooling laser for Sr. The photoionization cross section of Rb in the $5{P}_{3/2}$ state at 461 nm is determined to be $1.4(1)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}17}$ cm ${}^{2}$ . It is important to consider this loss rate to realize a sufficiently large number of trapped Rb atoms to achieve a quantum degenerate mixture of Rb and Sr.We demonstrate the simultaneous magneto-optical trapping (MOT) of Rb and Sr and examine the characteristic loss of Rb in the MOT due to photoionization by the cooling laser for Sr. The photoionization cross section of Rb in the $5{P}_{3/2}$ state at 461 nm is determined to be $1.4(1)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}17}$ cm${}^{2}$. It is important to consider this loss rate to realize a sufficiently large number of trapped Rb atoms to achieve a quantum degenerate mixture of Rb and Sr.

arXiv:1302.6414Physical Review AJun 28, 201314 citations

Limitations to the Number of

^{85}

Rb and

^{87}

Rb Atoms Simultaneously Confined in a Shallow Optical Trap.

Simultaneous Loading of

^{87}

Rb and

^{85}

Rb into a Optical Trap from a MOT

An Optical Trap for

^{85}

Rb and

^{87}

Examination of loading the isotopes

^{85}

Rb and

^{87}

Rb simultaneously into a shallow far-off-resonance trap (FORT) has revealed an unexpected decrease in maximum atom number loaded as compared to loading either isotope alone. The simultaneous loading of the FORT will be affected by additional homonuclear and heteronuclear light-assisted collisional losses. However, these losses are measured and found to be insufficient to explain the observed drop in total number of atoms loaded into the FORT. We find that our observations are consistent with a decrease in loading rate caused by inter-isotope disruptions of the efficient laser cooling required to load atoms into the optical trap.

^{87}

Rb in a double well optical lattice

5{P}_{3/2}

state at 461 nm is determined to be $1.4(1)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}17}$ cm

{}^{2}

. It is important to consider this loss rate to realize a sufficiently large number of trapped Rb atoms to achieve a quantum degenerate mixture of Rb and Sr.