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

Martijn Wubs*, Ali Ü.C. Hardal

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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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.

Original languageEnglish
Title of host publicationProceedings of SPIE
EditorsCesare Soci, Matthew T. Sheldon, Mario Agio
Number of pages9
Volume11091
PublisherSPIE - International Society for Optical Engineering
Publication date1 Jan 2019
Article number110910Z
ISBN (Electronic)9781510628755
DOIs
Publication statusPublished - 1 Jan 2019
EventQuantum Nanophotonic Materials, Devices, and Systems 2019 - San Diego, United States
Duration: 14 Aug 201915 Aug 2019

Conference

ConferenceQuantum Nanophotonic Materials, Devices, and Systems 2019
CountryUnited States
CitySan Diego
Period14/08/201915/08/2019
SponsorSPIE
SeriesProceedings of SPIE - The International Society for Optical Engineering
Volume11091
ISSN0277-786X

Keywords

  • Beam splitter
  • Coherent perfect absorption
  • Input-output relations
  • QED of lossy environments
  • Quantum state preparation
  • Squeezed light

Cite this

Wubs, M., & Hardal, A. Ü. C. (2019). Preparing pure states with lossy beam splitters using quantum coherent absorption of squeezed light. In C. Soci, M. T. Sheldon, & M. Agio (Eds.), Proceedings of SPIE (Vol. 11091). [110910Z] SPIE - International Society for Optical Engineering. Proceedings of SPIE - The International Society for Optical Engineering, Vol.. 11091 https://doi.org/10.1117/12.2529576