Editing Axion (section)

=== Nuclear spin precession ===
While Schiff's theorem states that a static nuclear electric dipole moment (EDM) does not produce atomic and molecular EDMs,<ref>{{cite journal |last1=Commins |first1=Eugene D. |last2=Jackson |first2=J. D. |last3=DeMille |first3=David P. |title=The electric dipole moment of the electron: An intuitive explanation for the evasion of Schiff's theorem |journal=American Journal of Physics |date=June 2007 |volume=75 |issue=6 |pages=532–536 |doi=10.1119/1.2710486 |bibcode=2007AmJPh..75..532C }}</ref> the axion induces an oscillating nuclear EDM that oscillates at the [[Larmor precession|Larmor frequency]]. If this nuclear EDM oscillation frequency is in resonance with an external electric field, a precession in the nuclear spin rotation occurs. This precession can be measured using precession magnetometry and if detected, would be evidence for axions.<ref>{{cite journal |last1=Flambaum |first1=V. V. |last2=Tan |first2=H. B. Tran |title=Oscillating nuclear electric dipole moment induced by axion dark matter produces atomic and molecular electric dipole moments and nuclear spin rotation |journal=Physical Review D |date=27 December 2019 |volume=100 |issue=11 |page=111301 |doi=10.1103/PhysRevD.100.111301 |arxiv=1904.07609 |s2cid=119303702 |bibcode=2019PhRvD.100k1301F }}</ref>

An experiment using this technique is the Cosmic Axion Spin Precession Experiment (CASPEr).<ref>{{cite journal |last1=Budker |first1=Dmitry |last2=Graham |first2=Peter W. |last3=Ledbetter |first3=Micah |last4=Rajendran |first4=Surjeet |last5=Sushkov |first5=Alexander O. |title=Proposal for a Cosmic Axion Spin Precession Experiment (CASPEr) |journal=Physical Review X |date=19 May 2014 |volume=4 |issue=2 |page=021030 |doi=10.1103/PhysRevX.4.021030 |arxiv=1306.6089 |bibcode=2014PhRvX...4b1030B |s2cid=118351193 }}</ref><ref>{{cite journal |display-authors=6 |last1=Garcon |first1=Antoine |last2=Aybas |first2=Deniz |last3=Blanchard |first3=John W |last4=Centers |first4=Gary |last5=Figueroa |first5=Nataniel L |last6=Graham |first6=Peter W |last7=Kimball |first7=Derek F Jackson |last8=Rajendran |first8=Surjeet |last9=Sendra |first9=Marina Gil |last10=Sushkov |first10=Alexander O |last11=Trahms |first11=Lutz |last12=Wang |first12=Tao |last13=Wickenbrock |first13=Arne |last14=Wu |first14=Teng |last15=Budker |first15=Dmitry |title=The cosmic axion spin precession experiment (CASPEr): a dark-matter search with nuclear magnetic resonance |journal=Quantum Science and Technology |date=January 2018 |volume=3 |issue=1 |pages=014008 |doi=10.1088/2058-9565/aa9861 |arxiv=1707.05312 |bibcode=2018QS&T....3a4008G |s2cid=51686418 }}</ref><ref>{{cite journal |display-authors=6 |last1=Aybas |first1=Deniz |last2=Adam |first2=Janos |last3=Blumenthal |first3=Emmy |last4=Gramolin |first4=Alexander V. |last5=Johnson |first5=Dorian |last6=Kleyheeg |first6=Annalies |last7=Afach |first7=Samer |last8=Blanchard |first8=John W. |last9=Centers |first9=Gary P. |last10=Garcon |first10=Antoine |last11=Engler |first11=Martin |last12=Figueroa |first12=Nataniel L. |last13=Sendra |first13=Marina Gil |last14=Wickenbrock |first14=Arne |last15=Lawson |first15=Matthew |last16=Wang |first16=Tao |last17=Wu |first17=Teng |last18=Luo |first18=Haosu |last19=Mani |first19=Hamdi |last20=Mauskopf |first20=Philip |last21=Graham |first21=Peter W. |last22=Rajendran |first22=Surjeet |last23=Kimball |first23=Derek F. Jackson |last24=Budker |first24=Dmitry |last25=Sushkov |first25=Alexander O. |title=Search for Axionlike Dark Matter Using Solid-State Nuclear Magnetic Resonance |journal=Physical Review Letters |date=9 April 2021 |volume=126 |issue=14 |page=141802 |doi=10.1103/PhysRevLett.126.141802 |pmid=33891466 |arxiv=2101.01241 |bibcode=2021PhRvL.126n1802A |s2cid=230524028 }}</ref>