Non-local classical optical correlation and implementing analogy of quantum teleportation

Sun, Yifan; Song, Xin-Bing; Qin, Hongwei; Zhang, Xiong; Yang, Zhenwei

doi:10.1038/srep09175

Cited by 31 publications

(35 citation statements)

References 37 publications

(56 reference statements)

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“…As a consequence of the mathematical similarity between the Hilbert spaces of multi-partite quantum states and multi-DoF classical optical fields, a corresponding concept of classical entanglement indicates the non-separability of the beam into uncoupled DoFs. After the initial suggestion by Spreeuw 19 , a substantial body of work has accumulated in the past five years in which classical entanglement is exploited in solving long-standing problems in polarization optics 27 28 29 , delineating the contributions of non-separability and intrinsic randomness to the coherence of an optical beam 10 30 , introducing new metrology schemes 31 , and implementing classical analogs of quantum information processing protocols, such as teleportation 32 33 , and super-dense coding, etc.…”

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confidence: 99%

Optical coherency matrix tomography

Kagalwala

Kondakci

Abouraddy

et al. 2015

Sci Rep

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The coherence of an optical beam having multiple degrees of freedom (DoFs) is described by a coherency matrix G spanning these DoFs. This optical coherency matrix has not been measured in its entirety to date—even in the simplest case of two binary DoFs where G is a 4 × 4 matrix. We establish a methodical yet versatile approach—optical coherency matrix tomography—for reconstructing G that exploits the analogy between this problem in classical optics and that of tomographically reconstructing the density matrix associated with multipartite quantum states in quantum information science. Here G is reconstructed from a minimal set of linearly independent measurements, each a cascade of projective measurements for each DoF. We report the first experimental measurements of the 4 × 4 coherency matrix G associated with an electromagnetic beam in which polarization and a spatial DoF are relevant, ranging from the traditional two-point Young’s double slit to spatial parity and orbital angular momentum modes.

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confidence: 99%

Optical coherency matrix tomography

Kagalwala

Kondakci

Abouraddy

et al. 2015

Sci Rep

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“…It has been shown recently that the classical electrodynamics contains a Hilbert space structure which makes it similar to quantum mechanics in certain aspects [33]. In addition to that, in recent experiments, researchers have explored the non-quantum entanglement (classical entanglement) in the classical optical field [34,35]. It is well known that the Maxwell's equations of the transverse modes of the electric field in an optical fiber can be transformed into an Optical-Schrödinger equation, where the z-axis of the optical fiber is analogous to time [36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Effect of geometry on the classical entanglement in a chaotic optical fiber

et al. 2015

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The effect of boundary deformation on the classical entanglement which appears in the classical electromagnetic field is considered. A chaotic billiard geometry is used to explore the influence of the mechanical modification of the optical fiber cross-sectional geometry on the production of classical entanglement within the electromagnetic fields. For the experimental realization of our idea, we propose an optical fiber with a cross section that belongs to the family of Robnik chaotic billiards. Our results show that a modification of the fiber geometry from a regular to a chaotic regime can enhance the transverse mode classical entanglement.

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“…It has been demonstrated that the quantum bound exists similarly in classical microwaves. The local and nonlocal correlations in the classical optical beams, which violate the Bell inequality, have been demonstrated in a series of works3435363738394041. However, the KCBS contextuality has not been studied in classical wave systems so far.…”

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Experimental contextuality in classical light

Zeng

Song

et al. 2017

Sci Rep

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The Klyachko, Can, Binicioglu, and Shumovsky (KCBS) inequality is an important contextuality inequality in three-level system, which has been demonstrated experimentally by using quantum states. Using the path and polarization degrees of freedom of classical optics fields, we have constructed the classical trit (cetrit), tested the KCBS inequality and its geometrical form (Wright’s inequality) in this work. The projection measurement has been implemented, the clear violations of the KCBS inequality and its geometrical form have been observed. This means that the contextuality inequality, which is commonly used in test of the conflict between quantum theory and noncontextual realism, may be used as a quantitative tool in classical optical coherence to describe correlation characteristics of the classical fields.

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Non-local classical optical correlation and implementing analogy of quantum teleportation

Cited by 31 publications

References 37 publications

Optical coherency matrix tomography

Optical coherency matrix tomography

Effect of geometry on the classical entanglement in a chaotic optical fiber

Experimental contextuality in classical light

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