Editing Quantum superposition (section)

==Experiments ==

Successful experiments involving superpositions of [[mesoscopic|relatively large]] (by the standards of quantum physics) objects have been performed.
* A [[beryllium]] [[ion]] has been trapped in a superposed state.<ref>{{Cite journal |last=Monroe |first=C. |last2=Meekhof |first2=D. M. |last3=King |first3=B. E. |last4=Wineland |first4=D. J. |date=1996-05-24 |title=A “Schrödinger Cat” Superposition State of an Atom |url=https://www.science.org/doi/10.1126/science.272.5265.1131 |journal=Science |language=en |volume=272 |issue=5265 |pages=1131–1136 |doi=10.1126/science.272.5265.1131 |issn=0036-8075}}</ref>
* A [[double slit experiment]] has been performed with molecules as large as [[Buckminsterfullerene|buckyballs]] and functionalized oligoporphyrins with up to 2000 atoms.<ref>{{cite web|url=http://www.quantum.at/research/molecule-interferometry-foundations/wave-particle-duality-of-c60.html |title=Wave-particle duality of C60 |date=31 March 2012 |url-status=bot: unknown |archive-url=https://web.archive.org/web/20120331115055/http://www.quantum.at/research/molecule-interferometry-foundations/wave-particle-duality-of-c60.html |archive-date=31 March 2012 }}</ref><ref>{{cite web|url=http://www.univie.ac.at/qfp/research/matterwave/stehwelle/standinglightwave.html|title=standinglightwave|first=Olaf|last=Nairz}}{{cite journal |title=Quantum superposition of molecules beyond 25 kDa |author=Yaakov Y. Fein |author2=Philipp Geyer |author3=Patrick Zwick |author4=Filip Kiałka |author5=Sebastian Pedalino |author6=Marcel Mayor |author7=Stefan Gerlich |author8=Markus Arndt |journal=Nature Physics |volume=15 |pages=1242–1245 |date=September 2019 |issue=12 |doi=10.1038/s41567-019-0663-9|bibcode=2019NatPh..15.1242F |s2cid=203638258 }}</ref>
* Molecules with masses exceeding 10,000 and composed of over 810 atoms have successfully been superposed<ref>Eibenberger, S., Gerlich, S., Arndt, M., Mayor, M., Tüxen, J. (2013). "Matter-wave interference with particles selected from a molecular library with masses exceeding 10 000 amu", ''Physical Chemistry Chemical Physics'', '''15''': 14696-14700. {{ArXiv|1310.8343}}</ref>
* Very sensitive magnetometers have been realized using [[SQUID|superconducting quantum interference devices]] (SQUIDS) that operate using quantum  interference effects in superconducting circuits.

* A [[piezoelectric]] "[[tuning fork]]" has been constructed, which can be placed into a superposition of vibrating and non-vibrating states. The resonator comprises about 10 trillion atoms.<ref>Scientific American: [http://www.scientificamerican.com/article.cfm?id=quantum-microphone ''Macro-Weirdness: "Quantum Microphone" Puts Naked-Eye Object in 2 Places at Once: A new device tests the limits of Schrödinger's cat'']</ref>
* Recent research indicates that [[chlorophyll]] within [[plants]] appears to exploit the feature of quantum superposition to achieve greater efficiency in transporting energy, allowing pigment proteins to be spaced further apart than would otherwise be possible.<ref name="doi:10.1038/nature08811">{{Cite journal|last=Scholes|first=Gregory |author2=Elisabetta Collini |author3=Cathy Y. Wong |author4=Krystyna E. Wilk |author5=Paul M. G. Curmi |author6=Paul Brumer |author7=Gregory D. Scholes|date=4 February 2010|title=Coherently wired light-harvesting in photosynthetic marine algae at ambient temperature|journal=[[Nature (journal)|Nature]]|volume=463|issue= 7281|pages=644–647|doi=10.1038/nature08811|bibcode = 2010Natur.463..644C|pmid=20130647|s2cid=4369439 }}</ref><ref>{{Cite news|url=http://www.scientificamerican.com/article.cfm?id=quantum-entanglement-and-photo|title=Quantum Entanglement, Photosynthesis and Better Solar Cells|last=Moyer|first=Michael|date=September 2009|work=Scientific American|access-date=12 May 2010}}</ref>