Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 20: Quantum Optics III
Q 20.3: Vortrag
Montag, 5. März 2018, 16:45–17:00, K 0.016
Temporal-mode selection with a quantum memory — •Benjamin Brecht1, Sarah Thomas1,2, Joseph Munns1,2, Patrick Ledingham1, Dylan Saunders1, Joshua Nunn3, and Ian Walmsley1 — 1Clarendon Laboratory, University of Oxford, Parks Road, Oxford, OX1 3PU, UK — 2QOLS, Blackett Laboratory, Imperial College London, London SW7 2BW, UK — 3Centre for Photonics and Photonic Materials, Department of Physics, University of Bath, North Road, Bath, BA2 7AY, UK
Photonic temporal modes (TMs) are appealing basis states for quantum information science. They are compatible with standard single-mode fibre, robust against linear dispersion, and span an infinite Hilbert space.
So far, TMs have been manipulated with dispersion-engineered frequency conversion processes, one example being the quantum pulse gate, where the selective conversion of one single TM to a different carrier frequency has been demonstrated.
Here we demonstrate TM selection with a quantum memory based on a two-photon Raman transition in warm atomic Caesium vapour. Contrary to frequency conversion, the memory does not necessarily change the carrier frequency of the selected mode, but rather separates TMs into different time bins. Also, the memory holds the potential to coherently re-shape the stored TM upon retrieval, making it a flexible tool for the manipulation of TMs at timescales that are not directly accessible with nonlinear optical processes.