Towards scalable photonics via quantum storage

Journal article

Single photons are a vital resource for optical quantum information processing. efficient and deterministic single photon sources do not yet exist, however. To date, experimental demonstrations of quantum processing primitives have been implemented using non-deterministic sources combined with heralding and/or postselection. Unfortunately, even for eight photons, the data rates are already so low as to make most experiments impracticable. It is well known that quantum memories, capable of storing photons until they are needed, are a potential solution to this 'scaling catastrophe'. Here, we analyze two protocols for generating multiphoton states using quantum memories, showing how the production rates can be enhanced by many orders of magnitude. We identify the time-bandwidth product as a key figure of merit in this connection. © 2013 SPIE.

Authors: Nunn, J; Langford, N; Kolthammer, W; Champion, T; Sprague, MR

• Publication status: Published
• Journal: ADVANCES IN SLOW AND FAST LIGHT VI
• Volume: 8636
• Publication date: 2013-01-01
• DOI: 10.1117/12.2012487
• ISSN: 0277-786X
• Language: English
• Keywords: Broadband storage; Quantum computing; Quantum memories; Synchronisation; Single photons; Quantum information processing; Cesium vapour; Raman scattering