dorsal/arxiv
View SchemaQuantum Algorithms for the Triangle Problem
| Authors | Frederic Magniez, Miklos Santha, Mario Szegedy |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0310134 |
| URL | https://arxiv.org/abs/quant-ph/0310134 |
Abstract
We present two new quantum algorithms that either find a triangle (a copy of $K_{3}$) in an undirected graph $G$ on $n$ nodes, or reject if $G$ is triangle free. The first algorithm uses combinatorial ideas with Grover Search and makes $\tilde{O}(n^{10/7})$ queries. The second algorithm uses $\tilde{O}(n^{13/10})$ queries, and it is based on a design concept of Ambainis~\cite{amb04} that incorporates the benefits of quantum walks into Grover search~\cite{gro96}. The first algorithm uses only $O(\log n)$ qubits in its quantum subroutines, whereas the second one uses O(n) qubits. The Triangle Problem was first treated in~\cite{bdhhmsw01}, where an algorithm with $O(n+\sqrt{nm})$ query complexity was presented, where $m$ is the number of edges of $G$.
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"abstract": "We present two new quantum algorithms that either find a triangle (a copy of\n$K_{3}$) in an undirected graph $G$ on $n$ nodes, or reject if $G$ is triangle\nfree. The first algorithm uses combinatorial ideas with Grover Search and makes\n$\\tilde{O}(n^{10/7})$ queries. The second algorithm uses $\\tilde{O}(n^{13/10})$\nqueries, and it is based on a design concept of Ambainis~\\cite{amb04} that\nincorporates the benefits of quantum walks into Grover search~\\cite{gro96}. The\nfirst algorithm uses only $O(\\log n)$ qubits in its quantum subroutines,\nwhereas the second one uses O(n) qubits. The Triangle Problem was first treated\nin~\\cite{bdhhmsw01}, where an algorithm with $O(n+\\sqrt{nm})$ query complexity\nwas presented, where $m$ is the number of edges of $G$.",
"arxiv_id": "quant-ph/0310134",
"authors": [
"Frederic Magniez",
"Miklos Santha",
"Mario Szegedy"
],
"categories": [
"quant-ph"
],
"title": "Quantum Algorithms for the Triangle Problem",
"url": "https://arxiv.org/abs/quant-ph/0310134"
},
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