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

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 proceeding › Article in proceedings › Research › peer-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 language	English
Title of host publication	Proceedings of SPIE
Editors	Cesare Soci, Matthew T. Sheldon, Mario Agio
Number of pages	9
Volume	11091
Publisher	SPIE - International Society for Optical Engineering
Publication date	1 Jan 2019
Article number	110910Z
ISBN (Electronic)	9781510628755
DOIs	https://doi.org/10.1117/12.2529576
Publication status	Published - 1 Jan 2019
Event	Quantum Nanophotonic Materials, Devices, and Systems 2019 - San Diego, United States Duration: 14 Aug 2019 → 15 Aug 2019

Conference

Conference	Quantum Nanophotonic Materials, Devices, and Systems 2019
Country	United States
City	San Diego
Period	14/08/2019 → 15/08/2019
Sponsor	SPIE

Series	Proceedings of SPIE - The International Society for Optical Engineering
Volume	11091
ISSN	0277-786X

Keywords

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

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10.1117/12.2529576

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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

Wubs, Martijn ; Hardal, Ali Ü.C. / Preparing pure states with lossy beam splitters using quantum coherent absorption of squeezed light. Proceedings of SPIE. editor / Cesare Soci ; Matthew T. Sheldon ; Mario Agio. Vol. 11091 SPIE - International Society for Optical Engineering, 2019. (Proceedings of SPIE - The International Society for Optical Engineering, Vol. 11091).

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title = "Preparing pure states with lossy beam splitters using quantum coherent absorption of squeezed light",

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.",

keywords = "Beam splitter, Coherent perfect absorption, Input-output relations, QED of lossy environments, Quantum state preparation, Squeezed light",

author = "Martijn Wubs and Hardal, {Ali {\"U}.C.}",

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Wubs, M & Hardal, AÜC 2019, Preparing pure states with lossy beam splitters using quantum coherent absorption of squeezed light. in C Soci, MT 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, Quantum Nanophotonic Materials, Devices, and Systems 2019, San Diego, United States, 14/08/2019. https://doi.org/10.1117/12.2529576

Preparing pure states with lossy beam splitters using quantum coherent absorption of squeezed light. / Wubs, Martijn; Hardal, Ali Ü.C.

Proceedings of SPIE. ed. / Cesare Soci; Matthew T. Sheldon; Mario Agio. Vol. 11091 SPIE - International Society for Optical Engineering, 2019. 110910Z (Proceedings of SPIE - The International Society for Optical Engineering, Vol. 11091).

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

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N2 - 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.

AB - 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.

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KW - Coherent perfect absorption

KW - Input-output relations

KW - QED of lossy environments

KW - Quantum state preparation

KW - Squeezed light

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