Editing Feedback (section)

=== Physics ===
Physical systems present feedback through the mutual interactions of its parts. Feedback is also relevant for the regulation of experimental conditions, noise reduction, and signal control.<ref>{{Cite journal |last=Bechhoefer |first=John |date=2005-08-31 |title=Feedback for physicists: A tutorial essay on control |url=https://link.aps.org/doi/10.1103/RevModPhys.77.783 |journal=Reviews of Modern Physics |volume=77 |issue=3 |pages=783–836 |doi=10.1103/RevModPhys.77.783|bibcode=2005RvMP...77..783B }}</ref> The thermodynamics of feedback-controlled systems has intrigued physicist since the [[Maxwell's demon]], with recent advances on the consequences for entropy reduction and performance increase.<ref>{{Cite journal |last1=Sagawa |first1=Takahiro |last2=Ueda |first2=Masahito |date=2008-02-26 |title=Second Law of Thermodynamics with Discrete Quantum Feedback Control |url=https://link.aps.org/doi/10.1103/PhysRevLett.100.080403 |journal=Physical Review Letters |language=en |volume=100 |issue=8 |page=080403 |doi=10.1103/PhysRevLett.100.080403 |pmid=18352605 |issn=0031-9007|arxiv=0710.0956 |bibcode=2008PhRvL.100h0403S }}</ref><ref>{{Cite journal |last1=Cao |first1=F. J. |last2=Feito |first2=M. |date=2009-04-10 |title=Thermodynamics of feedback controlled systems |url=https://link.aps.org/doi/10.1103/PhysRevE.79.041118 |journal=Physical Review E |language=en |volume=79 |issue=4 |page=041118 |doi=10.1103/PhysRevE.79.041118 |pmid=19518184 |issn=1539-3755|arxiv=0805.4824 |bibcode=2009PhRvE..79d1118C }}</ref>