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Mark 2024-02-22 12:53:20 -08:00
parent 579e05e2c3
commit 2dafcb026c
Signed by: Mark
GPG Key ID: C6D63995FE72FD80
6 changed files with 10 additions and 9 deletions

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@ -2,7 +2,7 @@
\definition{}
Just as before, we'll represent multi-quibit states as linear combinations of multi-qubit basis states. \par
Just as before, we'll represent multi-qubit states as linear combinations of multi-qubit basis states. \par
For example, a two-qubit state $\ket{ab}$ is the four-dimensional unit vector
\begin{equation}
\begin{bmatrix}
@ -33,7 +33,7 @@ we get one of the four basis states with the following probabilities:
\item $\mathcal{P}(\ket{10}) = c^2$
\item $\mathcal{P}(\ket{11}) = d^2$
\end{itemize}
Of course, the sum of all the above probabilities is $1$.
As before, the sum of all the above probabilities is $1$.
\problem{}

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@ -26,11 +26,11 @@ map, we can write it as follows:
\definition{}
Before we discussing multi-qubit quantum gates, we need to review to classical logic. \par
Of course, a classical logic gate is a linear map from $\mathbb{B}^m$ to $\mathbb{B}^n$
Of course, a classical logic gate is a linear map from $\{0,1\}^m$ to $\{0,1\}^n$
\problem{}<notgatex>
The \texttt{not} gate is a map from $\mathbb{B}$ to $\mathbb{B}$ defined by the following table: \par
The \texttt{not} gate is a map defined by the following table: \par
\begin{itemize}
\item $X\ket{0} = \ket{1}$

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@ -10,7 +10,7 @@ satisfies $GG^\text{T} = I$. \par
This implies the following: \par
\begin{itemize}
\item $G$ is square \par
\item $G$ is square. In other words, it has as many rows as it has columns. \par
\note{
If we think of $G$ as a map, this means that $G$ has as many inputs as it has outputs. \\
This is to be expected: we stated earlier that quantum gates do not destroy or create qubits.
@ -29,7 +29,7 @@ We can restate the above definition as follows: \par
A quantum gate is an invertible map from $\mathbb{U}^n$ to $\mathbb{U}^n$.
\definition{}<qgateislinear>
\generic{Remark:}
Let $G$ be a quantum gate. \par
Since quantum gates are, by definition, \textit{linear} maps,
the following holds: \par

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@ -53,6 +53,7 @@ The $Z$ gate is defined as follows: \par
\problem{}
Suppose that Alice and Bob are each in possession of one qubit. \par
These two qubits are entangled, and have the compound state $\ket{\Phi^+}$. \par
\note[Note]{We could say that they each have \say{half} of $\ket{\Phi^+}$.}
How can Alice send a two-bit classical state
(i.e, one of the four values \texttt{00}, \texttt{01}, \texttt{10}, \texttt{11}) \par
to Bob by only sending one qubit?

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@ -24,7 +24,7 @@
\input{tikzset}
\uptitlel{Advanced 2}
\uptitler{Winter 2022}
\uptitler{Winter 2024}
\title{Intro to Quantum Computing I}
\subtitle{Prepared by \githref{Mark} on \today{}}

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@ -16,7 +16,7 @@
% use the [nosolutions] flag to hide solutions,
% use the [solutions] flag to show solutions.
\documentclass[
solutions,
nosolutions,
singlenumbering,
shortwarning
]{../../../resources/ormc_handout}
@ -28,7 +28,7 @@
\def\bra#1{\left\langle#1\right|}
\uptitlel{Advanced 2}
\uptitler{Winter 2022}
\uptitler{Winter 2024}
\title{Intro to Quantum Computing II}
\subtitle{Prepared by \githref{Mark} on \today{}}