2011/08/04 by Karel Lemr
Computer Science · Physics and Astronomy · #Class (philosophy) #Generalization #Phase (matter) #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum gate #Quantum optics and atomic interactions #Scheme (mathematics) #State (computer science) #Topology (electrical circuits) #physics.comp-ph #quant-ph
paper · pdf · doi:10.1088/0953-4075/44/19/195501
published as J. Phys. B: At. Mol. Opt. Phys. 44 (2011) 195501 · 5 pages, 4 figures, accepted in Journal of Physics B
arxiv created 2011/08/04 · openalex publication_date 2011/08/30 · arxiv updated 2011/08/31 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Abstract\nA specific class of partially entangled states known as Knill-Laflamme-Milburn states (or KLM states) has been proved to be useful in relation to quantum information processing [1]. Although the usage of such states is widely investigated, considerably less effort has been invested into experimentally accessible preparation schemes. This paper discusses the possibility to employ a tunable controlled phase gate to generate an arbitrary Knill-Laflamme-Milburn state. In the first part, the idea of using the controlled phase gate is explained on the case of two-qubit KLM states. Optimization of the proposed scheme is then discussed for the framework of linear optics. Subsequent generalization of the scheme to arbitrary n-qubit KLM state is derived in the second part of this paper.