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SUMMARY:Scalable microfabricated ion traps for quantum information process
 ing\, quantum simulations and sensing  - Dr Bjeorn Lekitsch\, University o
 f Southampton
DTSTART:20160307T141500Z
DTEND:20160307T151500Z
UID:TALK64517@talks.cam.ac.uk
CONTACT:Teri Bartlett
DESCRIPTION:Microfabrication of advanced ion trap chips is an essential pa
 rt of engineering scalable quantum computer modules\, quantum simulators a
 nd quantum sensor devices. We have developed a variety of modular fabricat
 ion processes based on silicon\, diamond\, sapphire and glass substrates s
 uitable for a wide range of ion trap based devices. \n\nThe processes incl
 ude advanced features like copper wire structures embedded in a diamond su
 bstrate capable of carrying extremely high current densities of 10A throug
 h a 60x30um cross section. This feature is essential for ion trap based qu
 antum computer modules\, powered by long-wavelength radiation\, which is a
  very promising approach towards realising a scalable quantum computer arc
 hitecture. \n\nOther processes feature superconducting high-Q microwave re
 sonators and structures capable of handling >1000V between two electrodes 
 separated by 5um without electrical breakdown in vacuum\, which are import
 ant ingredients in quantum hybrid and high performance ion trap devices re
 spectively. Other on-chip features currently being developed include throu
 gh silicon VIAs (TSVs)\, on-chip trench capacitors\, optical fibres\, RF a
 nd temperature sensors. Furthermore we are working towards multi-wafer pac
 kages using wafer bonding\, MEMS fabrication and die bonding techniques. T
 hese packages incorporate features essential for scalable quantum computer
  modules and portable quantum sensors\, including on-chip single photon de
 tectors\, compact multi-channel analogue voltage generators and cryogenic 
 heat exchangers. \n\nIn addition I will discuss the use of microfabricated
  ion traps for quantum logic\, quantum simulations and quantum sensing app
 lications and the various experimental setups used at the IQT group to tes
 t and develop these. \n
LOCATION:Mott Seminar Room (Mott Building Room 531)\, Cavendish Laboratory
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