Quantum computers in phase space
| Autor: | Marcos Saraceno, Juan Pablo Paz, Cesar Miquel |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Physics
Quantum Physics FOS: Physical sciences Quantum tomography Atomic and Molecular Physics and Optics Open quantum system Quantum mechanics Quantum phase estimation algorithm Method of quantum characteristics Wigner distribution function Quantum algorithm Quantum Fourier transform Statistical physics Quantum Physics (quant-ph) Quantum computer |
| Zdroj: | Scopus-Elsevier |
| DOI: | 10.48550/arxiv.quant-ph/0204149 |
| Popis: | We represent both the states and the evolution of a quantum computer in phase space using the discrete Wigner function. We study properties of the phase space representation of quantum algorithms: apart from analyzing important examples, such as the Fourier Transform and Grover's search, we examine the conditions for the existence of a direct correspondence between quantum and classical evolutions in phase space. Finally, we describe how to directly measure the Wigner function in a given phase space point by means of a tomographic method that, itself, can be interpreted as a simple quantum algorithm. Comment: 16 pages, 7 figures, to appear in Phys Rev A |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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