Dynamical decoupling in solids 报告人:王亚 导师:杜江峰 University of Science Technology of china 201185
Dynamical decoupling in solids 报告人：王亚 导师：杜江峰 University of Science & Technology of China 2011.8.5
Outline Suppressing decoherence a Anomalous decoherence effect a The application of dd in quantum metrology 口 Future work
Suppressing decoherence Anomalous decoherence effect The application of DD in quantum metrology Future work Outline
Decoherence suppression with DD environment no access- system lo entanglement decoherence H=HS+HB+HsB decoherence Decoherence suppression H→>0 -iH'In.e iH. iHtm(x1+2+…+n e
H H H = + + S B HSB decoherence Decoherence suppression with DD Decoherence suppression ( ) 1 2 1 n 2 1 eff 1 2 n iH iH iH iH e e e e − − − − + + + 0 HSB →
Hahn spin echo echo S∑41S24 ……………”, …time time
/2 echo Z Z k k S A I Z Z k k −S A I Hahn spin echo time π time
Spin bath system Hn=S2∑4 Hn=2y(ses)-s·S)
k Z hf Z k k Z hf Z k k H S A I H S A I = = …… Spin bath system ( ) 0 3 3( )( ) 4 i j dd i ij j ij i j ij H S e S e S S r = • • − •