We present singly-exponential quantum algorithms for the One-Sided Crossing Minimization (OSCM) problem. We show that OSCM can be viewed as a set problem amenable for exact algorithms with a quantum speedup with respect to their classical counterparts. First, we exploit the quantum dynamic programming framework of Ambainis et al. [Quantum Speedups for Exponential-Time Dynamic Programming Algorithms. SODA 2019] to devise a QRAM-based algorithm that solves OSCM in 𝒪^*(1.728ⁿ) time and space. Second, we use quantum divide and conquer to obtain an algorithm that solves OSCM without using QRAM in 𝒪^*(2ⁿ) time and polynomial space.
@InProceedings{caroppo_et_al:LIPIcs.GD.2024.20, author = {Caroppo, Susanna and Da Lozzo, Giordano and Di Battista, Giuseppe}, title = {{Quantum Algorithms for One-Sided Crossing Minimization}}, booktitle = {32nd International Symposium on Graph Drawing and Network Visualization (GD 2024)}, pages = {20:1--20:9}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-343-0}, ISSN = {1868-8969}, year = {2024}, volume = {320}, editor = {Felsner, Stefan and Klein, Karsten}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.GD.2024.20}, URN = {urn:nbn:de:0030-drops-213045}, doi = {10.4230/LIPIcs.GD.2024.20}, annote = {Keywords: One-sided crossing minimization, quantum graph drawing, quantum dynamic programming, quantum divide and conquer, exact exponential algorithms} }
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