Editing Bell test (section)

=== Ansmann et al. (2009): overcoming the detection loophole in solid state ===
This was the first experiment testing Bell inequalities with solid-state qubits (superconducting [[Phase qubit|Josephson phase qubits]] were used). This experiment surmounted the detection loophole using a pair of superconducting qubits in an entangled state. However, the experiment still suffered from the locality loophole because the qubits were only separated by a few millimeters.<ref>{{cite journal |last=Ansmann |first=Markus |author2=H. Wang |author3=Radoslaw C. Bialczak |author4=Max Hofheinz |author5=Erik Lucero |author6=M. Neeley |author7=A. D. O'Connell |author8=D. Sank |author9=M. Weides |author10=J. Wenner |author11=A. N. Cleland |author12=John M. Martinis |date=2009-09-24 |title=Violation of Bell's inequality in Josephson phase qubits |journal=Nature |volume=461 |issue=504–6 |pages=504–6 |doi=10.1038/nature08363 |bibcode=2009Natur.461..504A |pmid=19779447|s2cid=4401494 }}</ref>