Atomchip Bose-Einstein Condensation in A Portable Vacuum Cell

A $^{87}\mathrm{Rb}$ Bose-Einstein condensate (BEC) is produced in a portable atom-chip system less than $30\ifmmode\times\else\texttimes\fi{}30\ifmmode\times\else\texttimes\fi{}15\phantom{\rule{0.3em}{0ex}}\mathrm{cm}$, where the ultrahigh vacuum is maintained by a small, $8\phantom{\rule{0.3em}{0ex}}\mathrm{L}∕\mathrm{s}$ , ion pump and nonevaporable getter. An aluminum nitride chip with lithographically patterned copper is used to seal the vacuum system, provide the electrical feedthroughs, and create the magnetic trap potentials. All cooling and trapping processes occur $0.6--2.5\phantom{\rule{0.3em}{0ex}}\mathrm{mm}$ from ambient laboratory air. A condensate of about 2000 $^{87}\mathrm{Rb}$ atoms in $F=2,{m}_{F}=2$ is achieved after $4.21\phantom{\rule{0.3em}{0ex}}\mathrm{s}$ of rf forced evaporation. A magneto-optical trap lifetime of $30\phantom{\rule{0.3em}{0ex}}\mathrm{s}$ indicates the vacuum near the chip surface is about ${10}^{\ensuremath{-}10}\phantom{\rule{0.3em}{0ex}}\text{torr}$. This work suggests that a chip-based BEC-compatible vacuum system can occupy a volume of less than $0.5\phantom{\rule{0.3em}{0ex}}\mathrm{L}$ .A $^{87}\mathrm{Rb}$ Bose-Einstein condensate (BEC) is produced in a portable atom-chip system less than $30\ifmmode\times\else\texttimes\fi{}30\ifmmode\times\else\texttimes\fi{}15\phantom{\rule{0.3em}{0ex}}\mathrm{cm}$, where the ultrahigh vacuum is maintained by a small, $8\phantom{\rule{0.3em}{0ex}}\mathrm{L}∕\mathrm{s}$, ion pump and nonevaporable getter. An aluminum nitride chip with lithographically patterned copper is used to seal the vacuum system, provide the electrical feedthroughs, and create the magnetic trap potentials. All cooling and trapping processes occur $0.6--2.5\phantom{\rule{0.3em}{0ex}}\mathrm{mm}$ from ambient laboratory air. A condensate of about 2000 $^{87}\mathrm{Rb}$ atoms in $F=2,{m}_{F}=2$ is achieved after $4.21\phantom{\rule{0.3em}{0ex}}\mathrm{s}$ of rf forced evaporation. A magneto-optical trap lifetime of $30\phantom{\rule{0.3em}{0ex}}\mathrm{s}$ indicates the vacuum near the chip surface is about ${10}^{\ensuremath{-}10}\phantom{\rule{0.3em}{0ex}}\text{torr}$. This work suggests that a chip-based BEC-compatible vacuum system can occupy a volume of less than $0.5\phantom{\rule{0.3em}{0ex}}\mathrm{L}$.

Physical Review ANov 10, 2004122 citations

Bose-Einstein condensation on an atom chip

Chris J. Vale, Ben Upcroft, Matthew J. Davis +2 more

Jan 1, 20040 citations

Atom chip Bose-Einstein condensation in a portable vacuum cell

Shengwang Du, Matthew B. Squires, Leslie Czaia +6 more

Email Share Share with Facebook Share on X Post on reddit Share with LinkedIn Add to Mendeley Add to BibSonomy Share with WeChat Get Citation Copy Citation Text S. Du, M. B. Squires, L. Czaia, D. Z. Anderson, R. A. Saravanan, V. M. Bright, Y. Imai, J. Reichel, and T. W. Hänsch, "Atom chip Bose-Einstein condensation in a portable vacuum cell," in Conference on Lasers and Electro-Optics/International Quantum Electronics Conference and Photonic Applications Systems Technologies, Technical Digest (CD) (Optica Publishing Group, 2004), paper IPDA1. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save articleEmail Share Share with Facebook Share on X Post on reddit Share with LinkedIn Add to Mendeley Add to BibSonomy Share with WeChat Get Citation Copy Citation Text S. Du, M. B. Squires, L. Czaia, D. Z. Anderson, R. A. Saravanan, V. M. Bright, Y. Imai, J. Reichel, and T. W. Hänsch, "Atom chip Bose-Einstein condensation in a portable vacuum cell," in Conference on Lasers and Electro-Optics/International Quantum Electronics Conference and Photonic Applications Systems Technologies, Technical Digest (CD) (Optica Publishing Group, 2004), paper IPDA1. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article

Conference on Lasers and Electro-OpticsJan 1, 20049 citations

^{87}\mathrm{Rb}

Bose-Einstein condensate (BEC) is produced in a portable atom-chip system less than $30\ifmmode\times\else\texttimes\fi{}30\ifmmode\times\else\texttimes\fi{}15\phantom{\rule{0.3em}{0ex}}\mathrm{cm}$, where the ultrahigh vacuum is maintained by a small,

8\phantom{\rule{0.3em}{0ex}}\mathrm{L}∕\mathrm{s}

, ion pump and nonevaporable getter. An aluminum nitride chip with lithographically patterned copper is used to seal the vacuum system, provide the electrical feedthroughs, and create the magnetic trap potentials. All cooling and trapping processes occur

0.6--2.5\phantom{\rule{0.3em}{0ex}}\mathrm{mm}

from ambient laboratory air. A condensate of about 2000

^{87}\mathrm{Rb}

atoms in

F=2,{m}_{F}=2

is achieved after

4.21\phantom{\rule{0.3em}{0ex}}\mathrm{s}

of rf forced evaporation. A magneto-optical trap lifetime of

30\phantom{\rule{0.3em}{0ex}}\mathrm{s}

indicates the vacuum near the chip surface is about ${10}^{\ensuremath{-}10}\phantom{\rule{0.3em}{0ex}}\text{torr}$. This work suggests that a chip-based BEC-compatible vacuum system can occupy a volume of less than

0.5\phantom{\rule{0.3em}{0ex}}\mathrm{L}