IQS Temporary Page

This is the website for Online Workshops and Conferences organized by the Institute for Quantum Studies at Chapman University during the coronavirus pandemic.

This is a workshop for IQS members who are ordinarily resident at Chapman University to keep each other up to date about the research we have been doing during the pandemic. It will also serve as a test of the technology that may be used for larger conferences and workshops in the future.

All Chapman faculty, postdocs and students may join the talks, but it will not be widely advertised outside the IQS community. Talks will be held over Zoom and the URL to join is:

https://chapman.zoom.us/j/99960768815

Participants must be logged in to Zoom with their Chapman credentials. This is to prevent Zoom bombings and to ensure a small group.

• Cristhiano Duarte: TBD
  • TBD

• Armen Gulian: Recent months scientific activities at Advanced Physics Laboratory of IQS in Burtonsville, MD
  • I will talk on recent scientific articles we submitted during this pandemic season which summarize previously performed experiments and theoretical developments. Future plans will also be briefly sketched out.

• Lorenzo Catani: TBD
  • TBD

• Ismael de Paiva: TBD
  • TBD

• Cai Waegell: TBD
  • TBD

• Matt Leifer: Uncertainty from the Aharonov-Vaidman Identity
  • In this talk, I show how the Aharonov-Vaidman identity $A|\psi\rangle = \langle A \rangle |\psi\rangle + \Delta A |\psi^{\perp}_A\rangle$ can be used to prove relations between the standard deviations of observables in quantum mechanics. In particular, it offers a more direct and less abstract proof of the Robertson uncertainty relation $\Delta A \Delta B \geq \frac{1}{2} \left \vert \left \langle \left [ A,B \right ] \right \rangle \right \vert$ than the textbook proof based on the Cauchy-Schwartz inequality. I discuss the relationship between these two proofs and show how the Cauchy-Schwartz inequality can be derived from the Aharonov-Vaidman identity. I give Aharonov-Vaidman based proofs of several other uncertainty relations that have appeared in the literature and I show how the Aharonoov-Vaidman identity can be used to handle propagation of uncertainty in quantum mechanics.