The method 13, wherein said Unet sequence of {HEAD ~ operations} comprises a sequence of {TAIL ~ elementary operations} on qubits 
The method 13 , wherein said Unet sequence of { HEAD ~ operations } comprises a sequence of { TAIL ~ elementary operations } on qubits
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH