Chinese Physics C > 2023, Vol. 47 > Issue(10): 105104 DOI: 10.1088/1674-1137/ace9c3

Simulation of high-frequency gravitational wave detection using modulated Gaussian beam

1.
Department of physics, Chongqing University, Chongqing 400044, China
2.
Department of Physics and Chongqing Key Laboratory for Strongly Coupled Physics, Chongqing University, Chongqing 401331, China
3.
School of Physics and Astronomy, China West Normal University, Nanchong 637009, China

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Abstract：
This paper investigates the feasibility of using a Li-Baker detector based on a modulated Gaussian beam to detect gravitational waves in the GHz band. The first-order perturbation photon fluxes (PPF, signal of the detector) and the background photon fluxes (BPF, main noise of the detector), which vary with time, and the transverse distance are calculated. The results show that their propagation directions and energy densities are much different in some areas. Apart from BPF, we also consider two other important noises: diffraction noise and shot noise. In the simulation, it is found that the diffraction noise and shot noise are both lower than the signal level. Meanwhile, the main noise (BPF) can be eliminated when the receiving screen is located in certain special transverse areas where the BPF direction is opposite to that of PPF. Thus, the signal to noise ratio (SNR) obtained using our detection method can reach up to $320$ in some transverse areas. These results are beneficial for the design of the Li-Baker detector.
- high-frequency gravitational waves (HFGWs),
- transverse perturbative photon ﬂux (PPF),
- background photons ﬂux (BPF),
- shot noise,
- diffraction noise

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Mingjun Wu, Jin Li and Qingquan Jiang. Simulation of high frequency gravitational waves detection with modulated Gaussian beam[J]. Chinese Physics C. doi: 10.1088/1674-1137/ace9c3

Mingjun Wu, Jin Li and Qingquan Jiang. Simulation of high frequency gravitational waves detection with modulated Gaussian beam[J]. Chinese Physics C. doi:10.1088/1674-1137/ace9c3 shu

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Received: 2023-05-12

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沈阳化工大学材料科学与工程学院沈阳 110142

Simulation of high-frequency gravitational wave detection using modulated Gaussian beam

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Simulation of high-frequency gravitational wave detection using modulated Gaussian beam