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| Author |
Barreiro, Julio T. |
| Title |
Quantum physics: Environmental effects controlled |
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Journal Article |
| Year |
2011 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
7 |
Issue |
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Pages  |
927–928 |
| Keywords |
fromIPMRAS |
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An open quantum system loses its 'quantumness' when information about the state leaks into its surroundings. Researchers now show how this decoherence can be controlled between two incompatible regimes in the case of a single photon. |
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RPLAB @ gujma @ |
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817 |
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| Author |
Home, Jonathan |
| Title |
Quantum entanglement: Watching correlations disappear |
Type |
Journal Article |
| Year |
2010 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
6 |
Issue |
12 |
Pages |
938-939 |
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fromIPMRAS |
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Engineered decoherence enables tracking of multipartite entanglement as a quantum state decays. |
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no |
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RPLAB @ gujma @ |
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832 |
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Toyabe, Shoichi; Sagawa, Takahiro; Ueda, Masahito; Muneyuki, Eiro; Sano, Masaki |
| Title |
Experimental demonstration of information-to-energy conversion and validation of the generalized Jarzynski equality |
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Journal Article |
| Year |
2010 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
6 |
Issue |
12 |
Pages |
988-992 |
| Keywords |
fromIPMRAS |
| Abstract |
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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no |
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RPLAB @ gujma @ |
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831 |
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