PPT-Coherent excitation of Rydberg atoms on an atom chip

Rutger M T Thijssen Van der Waals Zeeman Instituut voor Experimentele Natuurkunde Abstract In Amsterdam We have recently produced the first twodimensional lattice of magnetic microtraps for ultracold atoms based on patterned magnetic films 1 Ultracold rubidium atoms are transferred to hundreds of individual microtraps each cloud hovering 10 micrometers above the chip surface and separated by 20 micrometers We are currently investigating highly excited Rydberg states of the atoms used to mediate longrange interactions between neighbouring microtraps This could allow entanglement of mesoscopic ensembles of atoms and paves the road toward quantum information processing with neutral atoms We have built a dedicated laser system using 780 nm and 480 nm narrowband diode lasers stabilised to a twophoton electromagnetically induced transparency resonance in a Rubidium vapour cell We can excite Rydberg states from n19 up to n100 We have used this system to excite and image Rydberg atoms in ultracold rubidium gas confined in a surface magnetooptical trap We are now studying the influence of the nearby magnetic and conducting chip surface on the Rydberg excited atoms . Contact interaction is short-range. . scattering length is small. Bose. gases are dilute. Optical lattices are big. Increase. scattering length: . unitarity. But this is still an s-wave interaction, for bosons. A Look Into the Ultimate. ESSENTIAL QUESTIONS:. Why was an image of individual atoms considered such an important breakthrough?. How scientists discovered the component particles within atoms?. How can we possibly know anything about atomic structures?. Mallory . Traxler. April 2013. Motivation. Continuous atom laser. Continuous, coherent stream of atoms. Outcoupled. from a BEC. Applications of atom lasers:. Atom interferometry. Electromagnetic fields. Atomos: Not to Be Cut. The History of . the Atom and the Atomic . Theory. Atomic Models. This model of the atom may look familiar to you. This is . the Bohr model. . In this model, the nucleus is orbited by electrons, which are in different energy levels. . Atoms, Orbitals & Bonding Topics:. Very quick history of chemistry…. What is organic chemistry?. Atomic models: nuclear to quantum. All . about . orbitals. How . orbitals fill: electron . configuration. Essential Questions:. What is. . the basic structure of atoms? . How is an atom’s mass calculated? . Which subatomic particles are electrically charged?. .. Essential Questions:. 4. Where are the three main subatomic particles located?. Atoms. . are the smallest unit of matter. . Matter. . is anything that has mass and takes up space. . A . ball is matter, water is matter, even the air you breathe is matter!. What is an atom. ? (cont.). 4.1 Early Theories of . Matter (& Early Chemistry – Alchemy and Related). 4.2 Subatomic Particles & Nuclear Atom. 4.2.5 Ultimate Structure of Matter – The Standard Model (Not in Book). Section 4.1 Early Ideas About Matter. Atoms and Isotopes. What you need to know about Atoms . and Isotopes:. Matter. Molecules. Elements. Chemical reaction. Periodic Table. The Atom. Parts of an atom. Isotopes. Unstable isotopes. Scientists and discoveries. Atoms and Isotopes. What you need to know about Atoms . and Isotopes:. Matter. Molecules. Elements. Chemical reaction. Periodic Table. The Atom. Parts of an atom. Isotopes. Unstable isotopes. Scientists and discoveries. Atoms are the fundamental blocks of matter…. Chapter Big Idea. Section 1: Early Ideas About Matter. What are the similarities and differences of the atomic models of Democritus, Aristotle, and Dalton?. Mallory . Traxler. April 2013. Motivation. Continuous atom laser. Continuous, coherent stream of atoms. Outcoupled. from a BEC. Applications of atom lasers:. Atom interferometry. Electromagnetic fields. Atoms are neutral. Protons = Electrons. There are special kinds of atoms..... Ions. Isotopes. Ions. An Ion is an atom that has gained or lost ELECTRONS, so it has an overall charge. If an atom gains electrons, it’s overall charge becomes negative. If an atom loses electrons, it’s overall charge becomes positive. . Part 2- Rydberg atoms. Typical Experiments: . Beam experiments. (ultra) cold atoms. Vapor cells. Goal. Couple atoms to cavities. Realize Jaynes-Cummings Hamiltonian. Single atom(dipole) - coupling to cavity:.