Quantum Entanglement of High Angular Momenta
Robert Fickler,Robert Fickler,Radek Lapkiewicz,Radek Lapkiewicz,William N. Plick,William N. Plick,Mario Krenn,Mario Krenn,Christoph Schaeff,Christoph Schaeff,Sven Ramelow,Sven Ramelow,Anton Zeilinger,Anton Zeilinger +13 more
TLDR
A method for converting the polarization state of photons into information encoded into spatial modes of a single photon is presented and entanglement of very high OAM can improve the sensitivity of angular resolution in remote sensing.Abstract:
Single photons with helical phase structures may carry a quantized amount of orbital angular momentum (OAM), and their entanglement is important for quantum information science and fundamental tests of quantum theory. Because there is no theoretical upper limit on how many quanta of OAM a single photon can carry, it is possible to create entanglement between two particles with an arbitrarily high difference in quantum number. By transferring polarization entanglement to OAM with an interferometric scheme, we generate and verify entanglement between two photons differing by 600 in quantum number. The only restrictive factors toward higher numbers are current technical limitations. We also experimentally demonstrate that the entanglement of very high OAM can improve the sensitivity of angular resolution in remote sensing.read more
Citations
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Journal ArticleDOI
Terahertz Metamaterials for Linear Polarization Conversion and Anomalous Refraction
Nathaniel K. Grady,Jane E. Heyes,Dibakar Roy Chowdhury,Yong Zeng,Matthew T. Reiten,Abul Kalam Azad,Antoinette J. Taylor,Diego A. R. Dalvit,Hou-Tong Chen +8 more
TL;DR: In this paper, the authors demonstrated ultrathin, broadband, and highly efficient metamaterial-based terahertz polarization converters that are capable of rotating a linear polarization state into its orthogonal one.
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Arbitrary spin-to–orbital angular momentum conversion of light
TL;DR: A metasurface converter for optical states that transforms polarization states into optical angular momentum states and illustrates a general material-mediated connection between SAM and OAM of light and may find applications in producing complex structured light and in optical communication.
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Detection of a Spinning Object Using Light’s Orbital Angular Momentum
TL;DR: Using twisted light, Lavery et al. detected rotation with an analogous angular Doppler shift, which may be useful for remote sensing and observational astronomy, and the multiplicative enhancement of the frequency shift may have applications for the remote detection of rotating bodies in both terrestrial and astronomical settings.
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Quantum teleportation of multiple degrees of freedom of a single photon
Xi-Lin Wang,Xin-Dong Cai,Zu-En Su,Ming-Cheng Chen,Dian Wu,Li Li,Nai-Le Liu,Chao-Yang Lu,Jian-Wei Pan +8 more
TL;DR: This work uses photon pairs entangled in both degrees of freedom (that is, hyper-entangled) as the quantum channel for teleportation, and develops a method to project and discriminate hyper-ENTangled Bell states by exploiting probabilistic quantum non-demolition measurement, which can be extended to more degrees offreedom.
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Orbital angular momentum 25 years on [Invited]
TL;DR: A brief review of the research in the field to date is examined and what future directions might hold is considered.
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