Study of acceleration measurement in gravitational wave detection

Li, Junlang; Zhang, Teng

doi:10.1088/1361-6382/ac4b98

Cited by 1 publication

(1 citation statement)

References 21 publications

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“…Similarly, other advanced GW detectors also require high-power lasers to improve the shot-noise limited sensitivity [14,53,54]. Furthermore, several of the key technique can be used to improve AWVA for the GW detection: frequency-dependent squeezed light injections [6,55], a true quantum nondemolition observable readout of acceleration measurement in the GW detection [56,57] and the application of using higher-order spatial modes of the cavity [58].…”

Section: Discussionmentioning

confidence: 99%

A potential third-generation gravitational-wave detector based on autocorrelative weak-value amplification

Huang¹,

He²,

Duan³

et al. 2023

Class. Quantum Grav.

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Reducing noises and enhancing signal-to-noise ratios (SNRs) have become critical for designing third-generation gravitational-wave (GW) detectors with a GW strain of less than $10^{-23}$/$\rm \sqrt{Hz}$. In this paper, we propose a potential third-generation GW detector based on autocorrelative weak-value amplification (AWVA) for GW detection with a strain of $h_g =$ $4 \times 10^{-25}$/$\rm \sqrt{Hz}$. In our scheme, a GW event induces a phase difference $\Delta \phi$ by passing through an 11-bounce delay line, 10-km arm-length, zero-area Sagnac interferometer illuminated with a 1064-nm laser. Subsequently, $\Delta \phi$ is amplified as the parameter of post-selection by choosing the appropriate pre-selected state and coupling strength in AWVA. In particular, we theoretically investigate the AWVA measurements for GW detection within the frequency band of 200 Hz $\leq$ $f_g$ $\leq$ 800 Hz, considering Gaussian noises with negative-decibel SNRs. The peak response of the AWVA sensitivity $\kappa(f_g)$ occurs at frequency $f_{g, max}$ = 500 Hz, which falls within the frequency band of interest of the current third-generation GW detectors. Our simulation results indicate that AWVA can demonstrate a measurable sensitivity of $\Theta(f_g)$ within the frequency band of interest. Moreover, the robustness of WVA shows promising potential in mitigating the effects of Gaussian noises.

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