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| Author |
Saunders, D. J.; Jones, S. J.; Wiseman, H. M.; Pryde, G. J. |
| Title |
Experimental EPR-steering using Bell-local states |
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Journal Article |
| Year |
2010 |
Publication |
Nat. Phys. |
Abbreviated Journal |
Nat. Phys. |
| Volume |
6 |
Issue  |
11 |
Pages |
845-849 |
| Keywords |
fromIPMRAS |
| Abstract |
The concept of `steering' was introduced in 1935 by Schrödinger as a generalization of the EPR (Einstein-Podolsky-Rosen) paradox. It has recently been formalized as a quantum-information task with arbitrary bipartite states and measurements, for which the existence of entanglement is necessary but not sufficient. Previous experiments in this area have been restricted to an approach that followed the original EPR argument in considering only two different measurement settings per side. Here we demonstrate experimentally that EPR-steering occurs for mixed entangled states that are Bell local (that is, that cannot possibly demonstrate Bell non-locality). Unlike the case of Bell inequalities, increasing the number of measurement settings beyond two-we use up to six-significantly increases the robustness of the EPR-steering phenomenon to noise. |
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RPLAB @ gujma @ |
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808 |
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Arcizet, O.; Jacques, V.; Siria, A.; Poncharal, P.; Vincent, P.; Seidelin, S. |
| Title |
A single nitrogen-vacancy defect coupled to a nanomechanical oscillator |
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Journal Article |
| Year |
2011 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
7 |
Issue |
11 |
Pages |
879-883 |
| Keywords |
fromIPMRAS |
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We position a single nitrogen-vacancy (NV) centre hosted in a diamond nanocrystal at the extremity of a SiC nanowire. This novel hybrid system couples the degrees of freedom of two radically different systems: a nanomechanical oscillator and a single quantum object. We probe the dynamics of the nano-resonator through time-resolved nanocrystal fluorescence and photon-correlation measurements, conveying the influence of a mechanical degree of freedom on a non-classical photon emitter. Moreover, by immersing the system in a strong magnetic field gradient, we induce a magnetic coupling between the nanomechanical oscillator and the NV electronic spin, providing nanomotion readout through a single electronic spin. Spin-dependent forces inherent to this coupling scheme are essential in a variety of active cooling and entanglement protocols used in atomic physics, and should now be within the reach of nanomechanical hybrid systems. |
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RPLAB @ gujma @ |
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819 |
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| Author |
Saffman, Mark |
| Title |
Quantum computing: A quantum telecom link |
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Journal Article |
| Year |
2010 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
6 |
Issue |
11 |
Pages |
838-839 |
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fromIPMRAS |
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Converting data-carrying photons to telecommunication wavelengths enables distribution of quantum information over long distances. |
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no |
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RPLAB @ gujma @ |
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833 |
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Raussendorf, Robert |
| Title |
Quantum computing: Shaking up ground states |
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Journal Article |
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2010 |
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Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
6 |
Issue |
11 |
Pages |
840-841 |
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fromIPMRAS |
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Measurement-based quantum computation with an Affleck-Kennedy-Lieb-Tasaki state is experimentally realized for the first time. |
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834 |
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Capmany, José; Gasulla, Ivana; Sales, Salvador |
| Title |
Microwave photonics: Harnessing slow light |
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Journal Article |
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2011 |
Publication |
Nature Photonics |
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Nat. Photon. |
| Volume |
5 |
Issue |
12 |
Pages |
731-733 |
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fromIPMRAS |
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Slow-light techniques originally conceived for buffering high-speed digital optical signals now look set to play an important role in providing broadband phase and true time delays for microwave signals. |
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778 |
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