Quantum Mechanics
Coordinators:
( formerly @Francesco Nuti (Deactivated))@Peter McNamara @Raymond Volkas
Members:
@Cedric Simenel @Maxim Goryachev @Navneet Krishnan @Anthony Williams @celine
Goal
To study quantum theories with a radiation signature that can be detected by SABRE
Investigated processes
Wave function collapse models such as Continuous spontaneous localisation
Pauli Exclusion Principle
Quantum Gravity theories
Stage 1
Process | Info | Signature | Selection | Background rate | Limits on signal rate | Limits on model parameters | Current limits |
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Theo |
| Theo | Exp | Exp | Exp | Theo | Theo |
Spontaneous radiation emission dR/dLmddE= k * Lmd/E in range 10-1000 keV assume is valid form 1 keV | 1 crystal with energy [1,20] keV. Background rate above 20 keV too high to add anything significant No energy in liquid scintillator | 0.4 cpd/keV/kg --> 400000 counts in 3 years | <1500 counts --> < 0.001 cpd/keV/kg | lambda< e-13s | lambda< e-11s | ||
Pauli Exclusion Principle violation | Electron transition 25-40 keV emission | 1 crystal [25,35] keV high background above 35 keV No energy in liquid scintillator | 0.4 cpd/keV/kg |
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Pauli Exclusion Principle violation |
| Nuclear transition 10 MeV emission | Scintillator + crystal signal >10 MeV Muon detector veto | background from muons, muon flux = …. veto efficiency= expected rate = |
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Quantum gravity |
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Stage 2 (example)
Continuous spontaneous localisation results competitive (1st), PEP nuclear violation less competitive (2nd), PEP electron violation not competitive (3rd). Quantum gravity undetectable (discarded)
Stage 3 (example)
Process | Signature | Selection | Background rate | Limits on signal rate | Limits on model parameters | Current limits | Writing |
|---|---|---|---|---|---|---|---|
Theo | Theo | Exp | Exp | Exp | Theo | Theo | Theo/Exp |
Continuous spontaneous localisation | correction factor applied to approximate the rate reduction between 1 and 10 keV | range extended to 25 keV as the extra range improves the limit | estimated 10% uncertainty on the background level | updared limit based on new assumptions | lambda< e-12s | lambda< e-11s | process description signature selection background results |
Pauli Exclusion Principle violation | Electron transition 25-40 keV emission |
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Pauli Exclusion Principle violation | Nuclear transition 10 MeV emission |
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Meeting room
https://unimelb.zoom.us/j/81576877136?pwd=Z2RiUjVaQ3hoaGQ3bXF3VEhCZ0Uxdz09
Reference material
PEP Violation - https://link.springer.com/content/pdf/10.1140/epjc/s10052-009-1068-1
Spontaneous Emission - https://arxiv.org/abs/2107.11237
https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-021-09556-0
