Two-Carrier Scheme: Evading the 3 dB Quantum Penalty of Heterodyne Readout in Gravitational-Wave Detectors

Teng Zhang, Philip Jones, Jiří Smetana, Haixing Miao, Denis Martynov, Andreas Freise, Stefan W. Ballmer

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Precision measurements using a traditional heterodyne readout suffer a 3 dB quantum noise penalty compared with a homodyne readout. The extra noise is caused by the quantum fluctuations in the image vacuum. We propose a two-carrier gravitational-wave detector design that evades the 3 dB quantum penalty of the heterodyne readout. We further propose a new way of realizing frequency-dependent squeezing utilizing two-mode squeezing in our scheme. It naturally achieves more precise audio frequency signal measurements with radio frequency squeezing. In addition, the detector is compatible with other quantum nondemolition techniques.

Original languageEnglish (US)
Article number221301
JournalPhysical Review Letters
Volume126
Issue number22
DOIs
StatePublished - Jun 4 2021

ASJC Scopus subject areas

  • General Physics and Astronomy

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