%0 Journal Article %1 PalaciosLaloy2010Experimental %A Palacios-Laloy, Agustin %A Mallet, Francois %A Nguyen, Francois %A Bertet, Patrice %A Vion, Denis %A Esteve, Daniel %A Korotkov, Alexander N. %D 2010 %I Nature Publishing Group %J Nature Physics %K bell-inequality, superconducting, weak-measurement %N 6 %P 442--447 %R 10.1038/nphys1641 %T Experimental violation of a Bell's inequality in time with weak measurement %U http://dx.doi.org/10.1038/nphys1641 %V 6 %X The violation of Bell inequalities with two entangled and spatially separated quantum two-level systems (TLSs) is often considered as the most prominent demonstration that nature does not obey local realism. Under different but related assumptions of macrorealism—which macroscopic systems plausibly fulfil—Leggett and Garg derived a similar inequality for a single degree of freedom undergoing coherent oscillations and being measured at successive times. Here, we test such a 'Bell's inequality in time', which should be violated by a quantum TLS. Our TLS is a superconducting quantum circuit in which Rabi oscillations are continuously driven while it is continuously and weakly measured. The time correlations present at the detector output agree with quantum-mechanical predictions and violate the Leggett–Garg inequality by five standard deviations.

@article{PalaciosLaloy2010Experimental, abstract = {{The violation of Bell inequalities with two entangled and spatially separated quantum two-level systems (TLSs) is often considered as the most prominent demonstration that nature does not obey local realism. Under different but related assumptions of macrorealism—which macroscopic systems plausibly fulfil—Leggett and Garg derived a similar inequality for a single degree of freedom undergoing coherent oscillations and being measured at successive times. Here, we test such a 'Bell's inequality in time', which should be violated by a quantum TLS. Our TLS is a superconducting quantum circuit in which Rabi oscillations are continuously driven while it is continuously and weakly measured. The time correlations present at the detector output agree with quantum-mechanical predictions and violate the Leggett–Garg inequality by five standard deviations.}}, added-at = {2019-02-26T15:22:34.000+0100}, author = {Palacios-Laloy, Agustin and Mallet, Fran\c{c}ois and Nguyen, Fran\c{c}ois and Bertet, Patrice and Vion, Denis and Esteve, Daniel and Korotkov, Alexander N.}, biburl = {https://www.bibsonomy.org/bibtex/2c6a2109aaf401be134f35b81cf82c65a/rspreeuw}, citeulike-article-id = {7290652}, citeulike-linkout-0 = {http://dx.doi.org/10.1038/nphys1641}, citeulike-linkout-1 = {http://dx.doi.org/10.1038/nphys1641}, day = 18, doi = {10.1038/nphys1641}, interhash = {19a23de6daa9e04d336512e9e605eeae}, intrahash = {c6a2109aaf401be134f35b81cf82c65a}, issn = {1745-2473}, journal = {Nature Physics}, keywords = {bell-inequality, superconducting, weak-measurement}, month = apr, number = 6, pages = {442--447}, posted-at = {2010-06-10 08:21:18}, priority = {2}, publisher = {Nature Publishing Group}, timestamp = {2019-02-26T15:22:34.000+0100}, title = {{Experimental violation of a Bell's inequality in time with weak measurement}}, url = {http://dx.doi.org/10.1038/nphys1641}, volume = 6, year = 2010 }