Monday, May 19, 2014

quantum information - Types of photon qubit encoding


How many types of qubit encoding on photons exist nowadays? I know only two:





  • Encoding on polarization: |Ψ=α|H+β|V |H=dk f(k)eiwktˆaH(k)|0Vacuum |V=dk f(k)eiwktˆaV(k)|0Vacuum




  • Time-bin: |Ψ=α|0+β|1 |0=dz f(tz/cδtph)eiw0(tz/c)ˆa(z)|0Vacuum |1=dz f(tz/c+τδtph)eiw0(tz/c+τ)ˆa(z)|0Vacuum




Is there anything else?




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