Entanglement witness criteria of strong-k-separability for multipartite quantum states
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DOI: 10.1007/s11128-018-1952-4
Abstract: Let $$H_{1}, H_{2},\ldots ,H_{n}$$H1,H2,…,Hn be separable complex Hilbert spaces with $$\dim H_{i}\ge 2$$dimHi≥2 and $$n\ge 2$$n≥2. Assume that $$\rho $$ρ is a state in $$H=H_1\otimes H_2\otimes \cdots \otimes H_n$$H=H1⊗H2⊗⋯⊗Hn. $$\rho $$ρ is called strong-k-separable $$(2\le… read more here.
Keywords: rho; strong separability; otimes cdots; entanglement witness ... See more keywords
Detection and quantification of entanglement with measurement-device-independent and universal entanglement witness
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DOI: 10.1088/1674-1056/ab9288
Abstract: Entanglement is the key resource in quantum information processing, and an entanglement witness (EW) is designed to detect whether a quantum system has any entanglement. However, prior knowledge of the target states should be known… read more here.
Keywords: universal entanglement; entanglement witness; measurement device; entanglement ... See more keywords
Entanglement witness game
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DOI: 10.1103/physreva.95.052326
Abstract: Motivated by Buscemi's semi-quantum nonlocal game [PRL 108, 200401(2012)], We propose an entanglement witness game, a quantum game based on entanglement witness. Similar as the semi-quantum nonlocal game, the existence of entanglement shared by the… read more here.
Keywords: game; witness game; entanglement witness; nonlocal game ... See more keywords
Optimization of ultrafine entanglement witnesses
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DOI: 10.1103/physreva.97.032343
Abstract: The ultrafine entanglement witness, introduced in [F. Shahandeh, M. Ringbauer, J.C. Loredo, and T.C. Ralph, Phys. Rev. Lett. \textbf{118}, 110502 (2017)], can seamlessly and easily improve any standard entanglement witness. In this paper, by combining… read more here.
Keywords: optimization ultrafine; original ultrafine; entanglement witness; entanglement ... See more keywords