1 / 10

Development of single-photon source based on single trapped barium ions

Development of single-photon source based on single trapped barium ions. Shu, Gang Department of Physics University of Washington. JTuB6 Quantum Sensing and Imaging II. Single-Photon Source’s Applications. Quantum Key Distributions Photon-Atom Entanglements.

perlman
Download Presentation

Development of single-photon source based on single trapped barium ions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Development of single-photon source based on single trapped barium ions Shu, Gang Department of Physics University of Washington JTuB6 Quantum Sensing and Imaging II

  2. Single-Photon Source’s Applications • Quantum Key Distributions • Photon-Atom Entanglements UW Physics

  3. Different Types of Single Photon Sources • Laser Attenuation • Single Atoms/Artificial Atoms • Trapped Ions • Quantum Dots • Correlated Photon Sources • Spontaneous Parametric Down-conversion UW Physics SaeWoo Nam, http://qubit.nist.gov/qiset-PDF/Nam.QISET2004.pdf

  4. Ion trap • Several W of RF is applied to the diagonal rods to generate rotating potential well to trap ions; Caps with DC voltage confine ions’ axial motions. • Lasers shine on ions to cool them down. • Microscope-objective images the ion on to cameras or PMTs for detection and monitoring. UW Physics

  5. Ba138’s Energy Level as Single Photon Source • The 6P1/2-6S1/2 is chosen as cool transition; 650nm red laser keep the ion off 5D3/2 state. • Spontaneous decays from both 6P1/2 and 6P3/2 can be candidates for single photon source. • The 6P3/2-5D5/2 transition can only be achieved by LED with a low efficiency UW Physics

  6. Apparatus EMCCD camera and correlator measuring HBT interference G. Howell FWN6 UW Physics

  7. Apparatus • Homemade Micro-Objective NA=.15~.26 • Fiber coupled deshelving LED @ 615nm W. Alt Optik 113, No. 3 (2002) 142–144 UW Physics

  8. Ion-Photon Entanglement • Pump Ti-Sapphire at higher power to get 493nm pulses; avoid LED’s low pumping efficiency and sideband difficulties. • When the ion spontaneously decay to 6S1/2 state, it goes randomly to two qubit states. This entangle the photon’s frequencies with the ion’s final states UW Physics

  9. Future Plan • Fiber coupled single photon source • Trap improvement to increase collection efficiency • Remote ion entanglement through photons UW Physics

  10. Acknowledgement • PI – Dr. Boris Blinov • Graduate students • Nathan Kurz • Matt Dietrich • Gary Howell • Adam Kleczewski • Undergraduates • Ryan Bowler • Viki Mirgon • Joanna Salacka • Joseph Pirtle • Sanghoon Chong Work funded by University of Washington Royalty Research Fund & Army DURIP UW Physics

More Related