@@ -620,7 +620,7 @@ <h2 id="different-dimensionalities">Different dimensionalities </h2>
620620decomposition of a state, we can immmediately say whether it is
621621entangled or not. If a state \( \psi \) has is entangled, then its Schmidt
622622decomposition has more than one term. Stated differently, the state is
623- entangled if the so-called Schmidt rank is is greater than one. There
623+ entangled if the so-called Schmidt rank is greater than one. There
624624is another important property of the Schmidt decomposition which is
625625related to the properties of the density matrices and their trace
626626operations and the entropies. In order to introduce these concepts we will look
@@ -1044,23 +1044,18 @@ <h2 id="two-qubit-gates">Two-Qubit Gates </h2>
10441044<!-- !split --> < br > < br > < br > < br > < br > < br > < br > < br > < br > < br >
10451045< h2 id ="control-qubit "> Control qubit </ h2 >
10461046< p > The control qubit is not acted
1047- upon. This can be represented as follows:
1047+ upon. This can be represented as follows if
10481048</ p >
1049-
10501049$$CU\vert xy\rangle=
1051- \vert xy\rangle \hspace{0.1cm} \mathrm{if} \hspace{0.1cm} \vert x \rangle =\vert 0\rangle
1052- $$
1053-
1054- < p > and</ p >
1055- $$
1056- \vert x \rangle U\vert y \rangle \hspace{0.1cm} \mathrm{if} \hspace{0.1cm} \vert x \rangle =\vert 1\rangle
1050+ \vert xy\rangle \hspace{0.1cm} \mathrm{if} \hspace{0.1cm} \vert x \rangle =\vert 0\rangle.
10571051$$
10581052
10591053
10601054<!-- !split --> < br > < br > < br > < br > < br > < br > < br > < br > < br > < br >
10611055< h2 id ="in-matrix-form "> In matrix form </ h2 >
10621056
1063- < p > It can be written in matrix form by writing it as a superposition of
1057+ < p > It is easier to see in a matrix form.
1058+ It can be written in matrix form by writing it as a superposition of
10641059the two possible cases, each written as a simple tensor product
10651060</ p >
10661061
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