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Zhu, J.; Christensen, J.; Jung, J.; Martin-Moreno, L.; Yin, X.; Fok, L.; Zhang, X.; Garcia-Vidal, F. J. |
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A holey-structured metamaterial for acoustic deep-subwavelength imaging |
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2011 |
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Nature Physics |
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Nat. Phys. |
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7 |
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1 |
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52-55 |
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For classical waves such as light or sound, diffraction sets a natural limit on how finely the details of an object can be recorded on its image. Recently, various optical superlenses based on the metamaterials concept have shown the possibility of overcoming the diffraction limit. Similar two-dimensional (2D) acoustic hyperlens designs have also been explored. Here we demonstrate a 3D holey-structured metamaterial that achieves acoustic imaging down to a feature size of λ/50. The evanescent field components of a subwavelength object are efficiently transmitted through the structure as a result of their strong coupling with Fabry-Pérot resonances inside the holey plate. This capability of acoustic imaging at a very deep-subwavelength scale may open the door for a broad range of applications, including medical ultrasonography, underwater sonar and ultrasonic non-destructive evaluation. |
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809 |
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Home, Jonathan |
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Title |
Quantum entanglement: Watching correlations disappear |
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Journal Article |
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2010 |
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Nature Physics |
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Nat. Phys. |
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6 |
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12 |
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938-939 |
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Engineered decoherence enables tracking of multipartite entanglement as a quantum state decays. |
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832 |
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Kim, Yong-Su; Lee, Jong-Chan; Kwon, Osung; Kim, Yoon-Ho |
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Title |
Protecting entanglement from decoherence using weak measurement and quantum measurement reversal |
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2012 |
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Nature Physics |
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Nat. Phys. |
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8 |
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2 |
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117-120 |
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fromIPMRAS |
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Decoherence, often caused by unavoidable coupling with the environment, leads to degradation of quantum coherence. For a multipartite quantum system, decoherence leads to degradation of entanglement and, in certain cases, entanglement sudden death. Tackling decoherence, thus, is a critical issue faced in quantum information, as entanglement is a vital resource for many quantum information applications including quantum computing, quantum cryptography, quantum teleportation and quantum metrology. Here, we propose and demonstrate a scheme to protect entanglement from decoherence. Our entanglement protection scheme makes use of the quantum measurement itself for actively battling against decoherence and it can effectively circumvent even entanglement sudden death. |
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815 |
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Haviland, David |
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Superconducting circuits: Quantum phase slips |
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2010 |
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Nature Physics |
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Nat. Phys. |
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6 |
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565–566 |
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Coulomb interactions can cause a rapid change in the phase of the wavefunction along a very narrow superconducting system. Such a phase slip at the quantum level is now measured in a chain of Josephson junctions. |
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807 |
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Author |
Saffman, Mark |
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Title |
Quantum computing: A quantum telecom link |
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2010 |
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Nature Physics |
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Nat. Phys. |
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6 |
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11 |
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838-839 |
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Converting data-carrying photons to telecommunication wavelengths enables distribution of quantum information over long distances. |
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RPLAB @ gujma @ |
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833 |
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