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UID:c0ddfdcf2ffc8c1964be1c11ab113307
DTSTAMP:20260605T235409Z
SUMMARY:Quantum Seminar – Jessica Eastman (Australian National University
 \, Canberra)
DESCRIPTION:Beyond Mean-Field: Modelling Atom Interactions in Compact Rotat
 ion Sensors\nAtomic matter-wave interferometers have demonstrated exceptio
 nal long-term stability in precision rotation sensing under controlled lab
 oratory conditions [1]. Translating this performance to compact\, mobile p
 latforms could revolutionise navigation technologies. Guided matter-wave g
 yroscopes\, which confine ultracold atomic gases in optical potentials\, o
 ffer a promising route toward miniaturisation and ruggedisation [2]. Howev
 er\, the tight confinement required for portability inherently enhances in
 teratomic interactions—introducing complex many-body effects that are ab
 sent in free-space configurations [3]. To assess the feasibility of such d
 evices\, it is essential to quantify how atom-atom interactions degrade in
 terferometric sensitivity. In this work\, we present a detailed numerical 
 characterisation using the multi-mode truncated Wigner (TW) method [4]\, w
 hich captures quantum fluctuations and spontaneous scattering processes be
 yond the scope of mean-field Gross-Pitaevskii treatments [5]. We also perf
 orm an analytical analysis using a simple few mode ansatz in order to full
 y understand the underlying mechanismsby which the atom-atom interactions 
 cause significant degradation. By isolating and characterising the degrada
 tion due to phase diffusion and four-wave mixing\, we identify optimal ope
 rating regimes and design parameters for guided matter-wave gyroscopes. Th
 is work lays the foundation for compact\, high-precision rotation sensors 
 suitable for mobile platforms\, and highlights the necessity of many-body 
 quantum modelling in the development of practical cold atom technologies.\
 nReferences\n[1] R. Geiger et al. AVS Quantum Sci. 2\, 024702 (2020).\n[2]
  M. M. Beydler et al. AVS Quantum Sci. 6\,014401 (2024).\n[3] T. L. Gustav
 son et al. Class. Quantum Grav. 17\, 2385 (2000).\n[4] S. A. Haine\, New J
 . Phys. 20\, 033009 (2018).\n[5] J. L. Helm et al. Phys. Rev. Lett. 114\, 
 134101 (2015).
URL:https://www.imperial.ac.uk/events/210431/quantum-seminar-jessica-eastma
 n/
DTSTART;TZID=Europe/London:20260612T123000
DTEND;TZID=Europe/London:20260612T140000
LOCATION:411\, Huxley Building\, South Kensington Campus\, Imperial College
  London\, London\, SW7 2AZ\, United Kingdom
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