Where is All the Antimatter?  The Electron EDM Search in Cold Molecules Edges Closer

Feb 2, 2022

Register for series link at ytpzsjG9NV1CVkfb3mufHLz8ihK1qL

Next-Gen Quantum Investigators Colloquium

Dr. Xing Wu, postdoc in the Doyle Lab, continues this lively series with a 45-min talk followed by Q&A and discussion with attendees.

Register ahead of time for series Zoom link HERE.


The Standard Model of particle physics accurately describes all fundamental particles discovered so far.  However, it is unable to address two great mysteries in physics:  the nature of dark matter and why matter dominates over antimatter throughout the Universe.  Novel theories beyond the Standard Mode — such as models that incorporate supersymmetry — may explain these phenomena.  These models predict very massive particles whose interactions violate time-reversal (T) symmetry and would give rise to an electric dipole moment (EDM) along the electron’s spin.  Thus, searching for EDM provides a powerful probe to these new physics and sheds light on the mystery of the matter-antimatter asymmetry of the Universe. Here, I share with you the exciting journey of the ACME electron EDM search that has set the current best limit on the value of electron EDM, measured by spin precession in a superposition of quantum states in cold molecules.  This result severely constrains T-violating new physics in 3~30 TeV energy range, exceeding what can be reached at the Large Hadron Collider.  New upgrades are now underway, projecting over an order-of-magnitude sensitivity enhancement for the next EDM search. 





Harvard Quantum Initiative


Carol Lynn Alpert