function?U?=?cgate（U0?p?q?N）
%Computes?‘controlled-U‘?gate?for?an?N-qubit?register?with?qubit?p?controlling
%qubit?q?（i.e.?if?qubit?p?is?0?do?nothing?if?qubit?p?is?1?perform?gate?U
%on?qubit?q）.?This?is?again?done?with?sparse?matrices?to?save?memory.

m?=?[];
n?=?[];
s?=?[];

for?j?=?1:2^N
????
????bin1?=?dec2bin（j?-?1?N）;
????bin2?=?bin1;?
????%Create?two?binary?representations?of?the?qubit?representing?the
????%iteration
????
????if?bin1（p）==‘0‘
????????m?=?[m?j];
????????n?=?[n?j];
????????s?=?[s?1];
????????%Assigns?matrix?index?（m?n）?depending?on?if?bit?p?is?‘0‘?or?‘1‘
????????%If?‘0‘?do?nothing.?If?‘1‘?keep?going
????else
????????switch?bin2（q）
????????????case?‘0‘
????????????????bin2（q）=‘1‘;
????????????case?‘1‘
????????????????bin2（q）=‘0‘;
????????end
????????%Flips?qubi

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-04-10?19:50??Quantum-Computing-Projects-master\
?????文件????????1223??2018-04-10?19:50??Quantum-Computing-Projects-master\cgate.m
?????目錄???????????0??2018-04-11?09:40??__MACOSX\
?????目錄???????????0??2018-04-11?09:40??__MACOSX\Quantum-Computing-Projects-master\
?????文件?????????172??2018-04-10?19:50??__MACOSX\Quantum-Computing-Projects-master\._cgate.m
?????文件????????1300??2018-04-10?19:50??Quantum-Computing-Projects-master\grover.m
?????文件?????????172??2018-04-10?19:50??__MACOSX\Quantum-Computing-Projects-master\._grover.m
?????文件?????????725??2018-04-10?19:50??Quantum-Computing-Projects-master\measure_qubit.m
?????文件?????????172??2018-04-10?19:50??__MACOSX\Quantum-Computing-Projects-master\._measure_qubit.m
?????文件?????????515??2018-04-10?19:50??Quantum-Computing-Projects-master\README.md
?????文件?????????172??2018-04-10?19:50??__MACOSX\Quantum-Computing-Projects-master\._README.md
?????文件????????1013??2018-04-10?19:50??Quantum-Computing-Projects-master\spadamard.m
?????文件?????????172??2018-04-10?19:50??__MACOSX\Quantum-Computing-Projects-master\._spadamard.m