ZI Quantum Technology Lecture Series presents:
'Photonic quantum technologies: Metrology, Spins and Photons'
Speaker: Prof J.G. Rarity, University of Bristol
Abstract:
In Bristol, we are researching the full range of applications of photonic quantum technologies including quantum communications, quantum measurement and quantum information processing. In this talk I will review the wider Bristol work and then focus on three topics that are my key interests.
The first is sub shot noise transmission measurements using commercial camera technologies where we have demonstrated record 'absolute' noise reductions and have begun scanned imaging experiments using a CCD to measure heralded photons.
The second topic is the development of spin-photon interfaces using cavity QED in the 1D limit. I will describe the progress towards 1D cavities containing single emitters focusing on our work with quantum dots and colour centres in diamond. Both systems exhibit ground state spins that lead to spin dependent transitions and the potential to entangle ground state spin with emitted or reflected photons. Spin-photon entanglers are effectively universal and deterministic quantum gates enabling quantum memories, quantum repeaters and eventually large-scale quantum computation.
The third topic focuses on using the ground state spin in NV-centres used as electric field and/or nuclear magnetic field sensors stimulated by the difficulty of fabricating cavity structures coupled to NV-centres. In particular, we are perfecting a strain sensing technique using the ground state spin hyperfine split by the local nitrogen 14 nucleus.
eeb087747633a86c792df684271692e1B258Thursday, April 24, 2025 - 11:20http://www.zeplerinstitute.ac.uk/events/photonic-quantum-technologies-metrology-…QLM Seminars<a style='color:white' href='http://data.southampton.ac.uk/building/53'>New Mountbatten (53)</a> - 4025http://data.southampton.ac.uk/building/53.map