572 research outputs found
The ability of Lisa, Taiji, and their networks to detect the stochastic gravitational wave background generated by Cosmic Strings
The cosmic string contributes to our understanding and revelation of the
fundamental structure and evolutionary patterns of the universe, unifying our
knowledge of the cosmos and unveiling new physical laws and phenomena.
Therefore, we anticipate the detection of Stochastic Gravitational Wave
Background (SGWB) signals generated by cosmic strings in space-based detectors.
We have analyzed the detection capabilities of individual space-based
detectors, Lisa and Taiji, as well as the joint space-based detector network,
Lisa-Taiji, for SGWB signals produced by cosmic strings, taking into account
other astronomical noise sources. The results indicate that the Lisa-Taiji
network exhibits superior capabilities in detecting SGWB signals generated by
cosmic strings and can provide strong evidence. The Lisa-Taiji network can
achieve an uncertainty estimation of for cosmic string
tension , and can provide evidence for the presence of
SGWB signals generated by cosmic strings at , and strong
evidence at . Even in the presence of only SGWB signals, it
can achieve a relative uncertainty of for cosmic string
tension , and provide strong evidence at
Probing the gravitational wave background from cosmic strings with Alternative LISA-TAIJI network
As one of the detection targets of all gravitational wave detectors at
present, stochastic gravitational wave background (SGWB) provides us an
important way to understand the evolution of our universe. In this paper, we
explore the feasibility of detecting the SGWB generated by the loops, which
arose throughout the cosmological evolution of the cosmic string network, by
individual space detectors (e.g.~LISA, TAIJI) and joint space detectors
(LISA-TAIJI). For joint detectors, we choose three different configurations of
TAIJI (e.g.~TAIJIm, TAIJIp, TAIJIc) to form the LISA-TAIJI networks. And we
investigate the performance of them to detect the SGWB. Though comparing the
power-law sensitivity (PLS) curves of individual space detectors and joint
detectors with energy density spectrum of SGWB. We find that LISA-TAIJIc has
the best sensitivity for detecting the SGWB from cosmic string loops and is
promising to further constrains the tension of cosmic sting
Mid-infrared spectrally-pure single-photon states generation from 22 nonlinear optical crystals
We theoretically investigate the preparation of pure-state single-photon
source from 14 birefringent crystals (CMTC, THI, LiIO, AAS, HGS, CGA, TAS,
AGS, AGSe, GaSe, LIS, LISe, LGS, and LGSe) and 8 periodic poling crystals (LT,
LN, KTP, KN, BaTiO, MgBaF, PMN-0.38PT, and OP-ZnSe) in a wavelength
range from 1224 nm to 11650 nm. The three kinds of group-velocity-matching
(GVM) conditions, the phase matching conditions, the spectral purity, and the
Hong-Ou-Mandel interference are calculated for each crystal. This study may
provide high-quality single-photon sources for quantum sensing, quantum
imaging, and quantum communication applications at the mid-infrared wavelength
range.Comment: 11 pages, 5 figure
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