Berlin 2014 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 16: Poster: Quantum information, micromechanical oscillators, matter wave optics, precision measurements and metrology
Q 16.8: Poster
Montag, 17. März 2014, 16:30–18:30, Spree-Palais
Maxwell's demon observing a scattering process: Quantum surplus of energy-transfer — •C. Aris C.-Dreismann1, Tomasz P. Blach2, and Alexander Dreismann3 — 1Institute of Chemistry, TU Berlin, Germany — 2Queensland University of Technology, Brisbane, Australia — 3Department of Physics, Cavendish Laboratory, University of Cambridge, UK
Quantum correlations and associated quantum information concepts (e.g. quantum discord, entanglement) provide novel insights in various quantum-information-processing tasks, quantum-thermodynamics processes, open-system dynamics, and general many-body physics [1]. We investigate a new effect of correlations accompanying collision of two quantum systems A and B, the latter being part of a larger (interacting) system B+M. In contrast to the usual case of a classical "environment" or "demon" M (which can have only classical correlations with A+B during and after the collision), the quantum case [1] may exhibit novel features. Here, in the frame of ultrafast neutron collisional processes (Compton and inelastic neutron scattering), we report experimental evidence of a new phenomenon: Quantum surplus of energy and momentum transfers. Results are reported from liquid 4-He, D2 [2], and of H2O molecules confined in sub-nanometer cavities. Theoretical analysis shows that the findings have no classical analogue.
[1] K. Modi et al., The classical-quantum boundary for correlations: Discord and related measures, Rev. Mod. Phys. 84 (2012) 1655. [2] C. A. C.-Dreismann, E. MacA. Gray, T. P. Blach, AIP Advances 1 (2011) 022118; Nucl. Instr. Meth. A 676 (2012) 120.