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Journal Article

Quantum engineering of squeezed states for quantum communication and metrology

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Vahlbruch,  Henning
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

Chelkowski,  Simon
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;
AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons40437

Danzmann,  Karsten
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons40490

Schnabel,  Roman
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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njp7_10_371.pdf
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0707.2845v1.pdf
(Preprint), 398KB

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Citation

Vahlbruch, H., Chelkowski, S., Danzmann, K., & Schnabel, R. (2007). Quantum engineering of squeezed states for quantum communication and metrology. New Journal of Physics, 9, 371. doi:10.1088/1367-2630/9/10/371.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-47CC-F
Abstract
We report the experimental realization of squeezed quantum states of light, tailored for new applications in quantum communication and metrology. Squeezed states in a broad Fourier frequency band down to 1 Hz has been observed for the first time. Nonclassical properties of light in such a low frequency band is required for high efficiency quantum information storage in electromagnetically induced transparency (EIT) media. The states observed also cover the frequency band of ultra-high precision laser interferometers for gravitational wave detection and can be used to reach the regime of quantum non-demolition interferometry. And furthermore, they cover the frequencies of motions of heavily macroscopic objects and might therefore support the attempts to observe entanglement in our macroscopic world.