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Lupascu, Adrian |
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Title |
Nonlinear dynamics: Quantum pendula locked in |
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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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2 |
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100-101 |
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fromIPMRAS |
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A study of the autoresonant behaviour of a superconducting pendulum reveals that quantum fluctuations determine only the initial oscillator motion and not its subsequent dynamics. This could be important in the development of more efficient methods for reading solid-state qubits. |
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840 |
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Capmany, José; Gasulla, Ivana; Sales, Salvador |
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Title |
Microwave photonics: Harnessing slow light |
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Journal Article |
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2011 |
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Nature Photonics |
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Nat. Photon. |
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5 |
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12 |
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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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RPLAB @ gujma @ |
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778 |
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Trabesinger, Andreas |
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Title |
Quantum mechanics: Shaken foundations |
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Journal Article |
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2009 |
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Nature Physics |
Abbreviated Journal |
Nat. Phys. |
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5 |
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12 |
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863 |
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802 |
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Toyabe, Shoichi; Sagawa, Takahiro; Ueda, Masahito; Muneyuki, Eiro; Sano, Masaki |
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Experimental demonstration of information-to-energy conversion and validation of the generalized Jarzynski equality |
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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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988-992 |
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In 1929, Leo Szilard invented a feedback protocol in which a hypothetical intelligence called Maxwell's demon pumps heat from an isothermal environment and transduces it to work. After an intense controversy that lasted over eighty years; it was finally clarified that the demon's role does not contradict the second law of thermodynamics, implying that we can convert information to free energy in principle. Nevertheless, experimental demonstration of this information-to-energy conversion has been elusive. Here, we demonstrate that a nonequilibrium feedback manipulation of a Brownian particle based on information about its location achieves a Szilard-type information-energy conversion. Under real-time feedback control, the particle climbs up a spiral-stairs-like potential exerted by an electric field and obtains free energy larger than the amount of work performed on it. This enables us to verify the generalized Jarzynski equality, or a new fundamental principle of “information-heat engine” which converts information to energy by feedback control. |
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RPLAB @ gujma @ |
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831 |
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Author |
Home, Jonathan |
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Title |
Quantum entanglement: Watching correlations disappear |
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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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RPLAB @ gujma @ |
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832 |
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