some more work
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@ -25,7 +25,7 @@ def measure_all(input_circuits_and_states, **kwargs):
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return results
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return results
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def execution_statistics(results, scale=1, **kwargs):
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def execution_statistics(results, scale=None, **kwargs):
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Ns = deque()
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Ns = deque()
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avgs = deque()
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avgs = deque()
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std_devs = deque()
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std_devs = deque()
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@ -6,7 +6,8 @@ chapters=chapters/introduction.tex \
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chapters/quantum_computing.tex \
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chapters/quantum_computing.tex \
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chapters/stabilizer.tex \
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chapters/stabilizer.tex \
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chapters/implementation.tex \
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chapters/implementation.tex \
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chapters/conclusion.tex
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chapters/conclusion.tex \
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chapters/appendix.tex
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cover=cover.png
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cover=cover.png
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68
thesis/chapters/appendix.tex
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68
thesis/chapters/appendix.tex
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@ -0,0 +1,68 @@
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% vim: ft=tex
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\section{Appendix}
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\subsection{Source Code for the Benchmarks}
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\label{ref:code_benchmarks}
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The benchmarks used in \ref{ref:performance} are done using this code. Note
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that the execution time is measured which is inherently noisy. To account for
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the noise several strategies are used:
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\begin{enumerate}[1]
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\item{The same circuit is applied to the starting state several times. The
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minimal result is used as the noise must be positive}
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\item{Several circuits are applied to the starting state. The remaining
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noise is mixed with the variance due to the different circuits.}
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\item{Because the noise can be timely correlated (i.e. another process
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requires processor time for a longer period) the tests have been
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randomized such that the time correlated noise is distributed randomly over
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several uncorrelated measurements.}
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\end{enumerate}
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The code used to benchmark the three regimes is analogous and not included here.
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\lstinputlisting[title={Generating Data for the Dense State Vector vs. Graphical Simulator Benchmark}, language=Python, breaklines=true]{../performance/generate_data_scaling_qbits.py}
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\lstinputlisting[title={Code for Measuring and Computing the Execution Time and Statistics}, language=Python, breaklines=true]{../performance/measure_circuit.py}
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\subsection{Complete Graphical States from the Three Regimes}
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\label{ref:complete_graphs}
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Because the whole graphs are barely percetible windows have been used
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in Figure \ref{fig:graph_high_linear_regime} and Figure \ref{fig:graph_intermediate_regime}.
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For the sake of completeness the whole graphs are included here in Figure \ref{fig:graph_low_linear_regime_full},
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Figure \ref{fig:graph_intermediate_regime_full} and Figure \ref{fig:graph_high_linear_regime_full}.
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\begin{figure}[H]
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\centering
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\includegraphics[width=\linewidth]{graphics/graph_low_linear_regime.png}
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\caption[Typical Graphical State in the Low-Linear Regime]{Typical Graphical State in the Low-Linear Regime}
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\label{fig:graph_low_linear_regime_full}
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\end{figure}
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\begin{figure}[H]
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\centering
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\includegraphics[width=\linewidth]{graphics/graph_intermediate_regime.png}
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\caption[Typical Graphical State in the Intermediate Regime]{Typical Graphical State in the Intermediate Regime}
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\label{fig:graph_intermediate_regime_full}
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\end{figure}
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\begin{figure}[H]
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\centering
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\includegraphics[width=\linewidth]{graphics/graph_high_linear_regime.png}
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\caption[Typical Graphical State in the High-Linear Regime]{Typical Graphical State in the High-Linear Regime}
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\label{fig:graph_high_linear_regime_full}
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\end{figure}
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\subsection{Code to Generate the Example Graphs}
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\label{ref:code_example_graphs}
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This code has been used to generate the example graphs used in
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\ref{ref:performance}. Note that generating the graph is done using a random
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circuit as used in \ref{ref:code_benchmarks}. The generated \lstinline{dot}
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code is converted to an image using
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\lstinline{dot i_regime.dot -Tpng -o i_regime.png}.
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\lstinputlisting[title={Code used to Generate the Example Graphs}, language=Python, breaklines=true]{../performance/regimes/graph_intermediate_regime.py}
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@ -233,9 +233,6 @@ implemented in \lstinline{C} and are exported to python3 in the class
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\lstinline{RawGraphState}. This class has three main methods to implement the
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\lstinline{RawGraphState}. This class has three main methods to implement the
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three classes of operations.
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three classes of operations.
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%
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%
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%
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\begin{description}
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\begin{description}
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\item[\hspace{-1em}]{\lstinline{RawGraphState.apply_C_L}\\
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\item[\hspace{-1em}]{\lstinline{RawGraphState.apply_C_L}\\
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This method implements local clifford gates. It takes the qbit index
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This method implements local clifford gates. It takes the qbit index
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@ -408,12 +405,14 @@ qbits:
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The reason for this scaling will be clear later; one can observe that the
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The reason for this scaling will be clear later; one can observe that the
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performance of the graphical simulator increases in some cases with growing
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performance of the graphical simulator increases in some cases with growing
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number of qbits when the circuit length is constant.
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number of qbits when the circuit length is constant. The code used to generate the
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data for these plots can be found in \ref{ref:code_benchmarks}.
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As described by \cite{andersbriegel2005} the graphical simulator is exponentially
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As described by \cite{andersbriegel2005} the graphical simulator is exponentially
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faster than the dense vector simulator. According to \cite{andersbriegel2005} it
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faster than the dense vector simulator. According to \cite{andersbriegel2005} it
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is considerably faster than a simulator using the straight forward approach simulating
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is considerably faster than a simulator using the straight forward approach simulating
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the stabilizer tableaux like CHP \cite{CHP}.
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the stabilizer tableaux like CHP \cite{CHP} with an average runtime behaviour
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of $\mathcal{O}\left(n\log(n)\right)$ instead of $\mathcal{O}\left(n^2\right)$.
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One should be aware that the gate execution time (the time required to apply a gate
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One should be aware that the gate execution time (the time required to apply a gate
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to the state) highly depends on the state it is applied to. For the dense vector
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to the state) highly depends on the state it is applied to. For the dense vector
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@ -448,33 +447,36 @@ regimes:
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\begin{figure}
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\begin{figure}
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\centering
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\centering
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\includegraphics[width=\linewidth]{../performance/regimes/graph_low_linear_regime.png}
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\includegraphics[width=\linewidth]{graphics/graph_low_linear_regime.png}
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\caption[Typical Graphical State in the Low-Linear Regime]{Typical Graphical State in the Low-Linear Regime}
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\caption[Typical Graphical State in the Low-Linear Regime]{Typical Graphical State in the Low-Linear Regime}
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\label{fig:graph_low_linear_regime}
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\label{fig:graph_low_linear_regime}
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\end{figure}
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\end{figure}
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\begin{figure}
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\begin{figure}
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\centering
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\centering
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\includegraphics[width=\linewidth]{../performance/regimes/graph_intermediate_regime.png}
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\includegraphics[width=\linewidth]{graphics/graph_intermediate_regime_cut.png}
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\caption[Typical Graphical State in the Intermediate Regime]{Typical Graphical State in the Intermediate Regime}
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\caption[Window of a Typical Graphical State in the Intermediate Regime]{Window of a Typical Graphical State in the Intermediate Regime}
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\label{fig:graph_intermediate_regime}
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\label{fig:graph_intermediate_regime}
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\end{figure}
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\end{figure}
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\begin{figure}
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\begin{figure}
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\centering
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\centering
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\includegraphics[width=\linewidth]{../performance/regimes/graph_high_linear_regime.png}
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\includegraphics[width=\linewidth]{graphics/graph_high_linear_regime_cut.png}
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\caption[Typical Graphical State in the High-Linear Regime]{Typical Graphical State in the High-Linear Regime}
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\caption[Window of a Typical Graphical State in the High-Linear Regime]{Window of a Typical Graphical State in the High-Linear Regime}
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\label{fig:graph_high_linear_regime}
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\label{fig:graph_high_linear_regime}
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\end{figure}
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\end{figure}
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These two regimes can be explained when considering the graphical states that
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These two regimes can be explained when considering the graphical states that
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typical live in these regimes. With increased circuit length the amount of
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typical live in these regimes. With increased circuit length the amount of
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edges increases which makes toggling neighbourhoods harder. Graphs from the
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edges increases which makes toggling neighbourhoods harder. Graphs from the
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low-linear, intermediate and high-linear regime can be seen in
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low-linear, intermediate and high-linear regime can be seen in Figure
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Figure \ref{fig:graph_low_linear_regime}, Figure \ref{fig:graph_intermediate_regime} and
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\ref{fig:graph_low_linear_regime}, Figure \ref{fig:graph_intermediate_regime}
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Figure \ref{fig:graph_high_linear_regime}. The latter is hardly visible; this is due
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and Figure \ref{fig:graph_high_linear_regime}. Due to the great amount of edges
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to the great amount of edges in this regime. Further the regimes are not clearly
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in the intermediate and high-linear regime the pictures show a window of the
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visibe for $n>30$ qbits so choosing smaller graphs is not possible.
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actual graph. The full images are in \ref{ref:complete_graphs}. Further the
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regimes are not clearly visibe for $n>30$ qbits so choosing smaller graphs is
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not possible. The code that was used to generate these images can be found
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in \ref{ref:code_example_graphs}.
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The Figure \ref{fig:scaling_circuits_measurements_linear} brings more substance
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The Figure \ref{fig:scaling_circuits_measurements_linear} brings more substance
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to this interpretation. In this simulation the Pauli $X$ gate has been replaced
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to this interpretation. In this simulation the Pauli $X$ gate has been replaced
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@ -1,4 +1,4 @@
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\documentclass[a4paper,draft,12pt]{scrartcl}
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\documentclass[a4paper,12pt]{scrartcl}
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\usepackage[utf8]{inputenc}
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\usepackage[utf8]{inputenc}
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\usepackage{graphicx}
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\usepackage{graphicx}
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\usepackage{amssymb, amsthm}
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\usepackage{amssymb, amsthm}
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%\usepackage{struktex}
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%\usepackage{struktex}
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\usepackage{qcircuit}
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\usepackage{qcircuit}
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\usepackage{adjustbox}
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\usepackage{adjustbox}
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\usepackage[affil-it]{authblk}
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\usepackage{tocbibind}
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\usepackage[toc,page]{appendix}
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\usepackage{float}
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%\usepackage{tgcursor}
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%\usepackage{tgcursor}
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%\usepackage{courier}
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%\usepackage{courier}
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%\lstset{basicstyle=\fontfamily{qcr}\selectfont}
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%\lstset{basicstyle=\fontfamily{qcr}\selectfont}
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@ -29,8 +35,10 @@
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\numberwithin{equation}{section}
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\numberwithin{equation}{section}
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\title{An Efficient Quantum Computing Simulator using a Graphical Description for Many-Qbit Systems}
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\title{An Efficient Quantum Computing Simulator using a Graphical Description for Many-Qbit Systems \\
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\author{Daniel Knüttel}
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\large Bachelor Thesis}
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\author[1]{Daniel Knüttel}
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\affil[1]{Institute I - Theoretical Physics, University of Regensburg}
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\date{10.04.2020}
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\date{10.04.2020}
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\begin{document}
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\begin{document}
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\maketitle
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\maketitle
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@ -46,6 +54,20 @@
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\include{chapters/implementation}
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\include{chapters/implementation}
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\include{chapters/conclusion}
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\include{chapters/conclusion}
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\appendix
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\include{chapters/appendix}
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\bibliographystyle{unsrt}
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\bibliographystyle{unsrt}
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\bibliography{main}{}
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\bibliography{main}{}
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\newpage
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\textbf{Erklärung zur Anfertigung:}\\
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Ich habe die Arbeit selbständig verfasst, keine anderen als die angegebenen Quellen und Hilfsmittel be-
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nutzt und bisher keiner anderen Prüfungsbehörde vorgelegt. Außerdem bestätige ich hiermit, dass die
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vorgelegten Druckexemplare und die vorgelegte elektronische Version der Arbeit identisch sind, dass ich
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über wissenschaftlich korrektes Arbeiten und Zitieren aufgeklärt wurde und dass ich von den in § 24 Abs.
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5 vorgesehenen Rechtsfolgen Kenntnis habe.
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\\
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\\
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Unterschrift:
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\end{document}
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\end{document}
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