Preparing pure states with lossy beam splitters using quantum coherent absorption of squeezed light

Martijn Wubs; Ali Ü. C. Hardal

doi:10.1117/12.2529576

3 September 2019 Preparing pure states with lossy beam splitters using quantum coherent absorption of squeezed light

Martijn Wubs, Ali Ü. C. Hardal

Proceedings Volume 11091, Quantum Nanophotonic Materials, Devices, and Systems 2019; 110910Z (2019) https://doi.org/10.1117/12.2529576
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States

Abstract

We investigate coherent perfect absorption (CPA) of squeezed coherent states of light by an absorbing beam splitter. First we derive the absorption coefficients for quantum coherence and for intensity, which generally differ. Secondly, we present the remarkable properties of a CPA-gate: two identical but otherwise arbitrary incoming squeezed coherent states can be completely stripped off their coherence, producing a pure entangled squeezed vacuum state at the output. Importantly, this output state of light is not entangled with the absorbing beam splitter by which it was produced. This makes the CPA gate potentially interesting for continuous-variable quantum state preparation.

Conference Presentation

Citation Download Citation

Martijn Wubs and Ali Ü. C. Hardal "Preparing pure states with lossy beam splitters using quantum coherent absorption of squeezed light", Proc. SPIE 11091, Quantum Nanophotonic Materials, Devices, and Systems 2019, 110910Z (3 September 2019); https://doi.org/10.1117/12.2529576

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