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SUMMARY:The Aharonov-Bohm phase is locally acquired\, like all other quant
 um phases - Chiara Marletto\, University of Oxford
DTSTART:20201120T110000Z
DTEND:20201120T120000Z
UID:TALK151276@talks.cam.ac.uk
CONTACT:40340
DESCRIPTION:In the Aharonov-Bohm (AB) effect\, a superposed charge acquire
 s a detectable phase by enclosing an infinite solenoid\, in a region where
  the solenoid’s electric and magnetic fields are zero. Its generation se
 ems therefore explainable only by the local action of gauge-dependent pote
 ntials\, not of gauge-independent fields. This was recently challenged by 
 Vaidman\, who explained the phase by the solenoid’s current interacting 
 with the electron’s field (at the solenoid). Still\, his model has a res
 idual nonlocality: it does not explain how the phase\, generated at the so
 lenoid\, is detectable on the charge. I will explain how to solve this non
 locality by explicitly quantizing the field. In this model\, the AB phase 
 is mediated locally by the entanglement between the charge and the photons
 \, like all electromagnetic phases. I will discuss a realistic experiment 
 to measure this phase difference locally\, by partial quantum state tomogr
 aphy on the charge\, without closing the interference loop.\n\nReferences\
 n\n1) https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.125.040401
  \n\n2) https://arxiv.org/abs/1906.03440 \n\nZoom Link\n\nPlease click the
  link below to join the webinar:\nhttps://us02web.zoom.us/j/86846521451?pw
 d=M0VUSE5wTEJwSndCbEx0VUtqNHpuZz09\nPasscode: 226745\n
LOCATION:Virtually\, at Zoom
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