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Journal Article

Entanglement of macroscopic test masses and the Standard Quantum Limit in laser interferometry

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Müller-Ebhardt,  Helge
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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

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

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

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Chen,  Yanbei
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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PRL100_013601.pdf
(Publisher version), 258KB

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Citation

Müller-Ebhardt, H., Rehbein, H., Schnabel, R., Danzmann, K., & Chen, Y. (2008). Entanglement of macroscopic test masses and the Standard Quantum Limit in laser interferometry. Physical Review Letters, 100(1): 013601. doi:10.1103/PhysRevLett.100.013601.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-6233-D
Abstract
We show that the generation of entanglement of two heavily macroscopic mirrors with masses of up to several kilograms are feasible with state of the art techniques of high-precision laser interferometry. The basis of such a demonstration would be a Michelson interferometer with suspended mirrors and simultaneous homodyne detections at both interferometer output ports. We present the connection between the generation of entanglement and the Standard Quantum Limit (SQL) for a free mass. The SQL is a well-known reference limit in operating interferometers for gravitational-wave detection and provides a measure of when macroscopic entanglement can be observed in the presence of realistic decoherence processes.