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DTSTART:20240310T070000
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DTSTART:20231105T060000
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DTSTART;TZID=America/Toronto:20240605T120000
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URL:https://uwaterloo.ca/institute-for-quantum-computing/events/iqc-student
 -seminar-featuring-connor-kapahi-0
LOCATION:QNC - Quantum Nano Centre 200 University Avenue West Room QNC 1201
  Waterloo ON N2L 3G1 Canada
SUMMARY:IQC Student Seminar Featuring Connor Kapahi
CLASS:PUBLIC
DESCRIPTION:DESIGNING A PRECISION GRAVITATIONAL EXPERIMENT AND BUDGETING\nU
 NCERTAINTIES\n\nQuantum-Nano Centre\, 200 University Ave West\, Room QNC 1
 201 Waterloo\,\nON CA N2L 3G1\n\nNeutrons have a long history at the foref
 ront of precision metrology.\nFollowing in the footsteps of the first expe
 riment that measured the\neffect of gravity on a quantum particle (the C.O
 .W. experiment)\, we\naim to generate structured neutron momentum profiles
  and apply these\nstates to measure the gravitational constant\, big-G. Th
 e significant\ndiscrepancy between modern big-G experimental results under
 scores the\nneed for new experiments whose systematic uncertainties can be
 \ndecoupled from existing techniques. Previously\, perfect-crystal\nneutro
 n interferometers were used to measure local gravitational\nacceleration\,
  little-g\, unfortunately\, the low neutron flux (a few\nneutrons per seco
 nd) of these devices makes them impractical for\nprecision measurements of
  big-G. The recently demonstrated\nPhase-Grating Moiré Interferometer (PG
 MI) offers an increase in\nneutron flux of several orders of magnitude whi
 le preserving the large\ninterferometer area\, and thus the sensitivity\, 
 of a perfect-crystal\ninterferometer. This device possesses a set of syste
 matic\nuncertainties that are independent from those in existing technique
 s\nthat measure big-G. In this talk\, I will discuss the feasibility of\n
 measuring big-G using a neutron PGMI apparatus with a test mass on the\nor
 der of 1 tonne. Further\, I will address how we can optimize this\nsetup t
 o maximize the phase shift from a 1-tonne mass and quantify the\nvarious s
 ources of uncertainty in the proposed experiment.
DTSTAMP:20260419T071809Z
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