Some statistical correlation analyses for Fermi/LAT Blazars

Nie, Jianjun; Fan, J. H.; Ru-shu, Yang; Yang, Jiang-He

doi:10.1007/s11433-014-5560-8

Cited by 7 publications

(5 citation statements)

References 55 publications

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“…Under the same conditions, we have also studied the acoustomechanical and mechanical entanglement considering multiple flexural modes. Large acoustomechanical entanglement can be achieved for single or multimode case, confirming previous results that indicated that vacuum forces enable steady-state acoustomechanical entanglement [17]. On the other hand, we demonstrated that the mechanical entanglement is very fragile and strongly depends on ϑ (N ) .…”

Section: Discussionsupporting

confidence: 90%

“…Ground-state cooling and large steady-state acoutomechanical entanglement, E N ≈ 5, is shown to be possible via Casimir-Polder interactions, in agreement with ref. [17].…”

Section: Acoustomechanical Entanglement In a Single Mode Membranementioning

confidence: 99%

“…They have shown that the ground state cooling of the nanosphere is achieved for certain sphere-mirror distances and that it can be optimized by tuning the mirror oscillation frequency. In reference [17], the study is extended to consider two nanospheres trapped near the cavity mirrors by an external driving laser. By tuning the external control parameters and the cavity-sphere distance, they found to be possible to achieve large steady-state optomechanical entanglement.…”

Section: Introductionmentioning

confidence: 99%

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Cooling and entanglement of multimode graphene resonators via vacuum fluctuations

Ribeiro¹,

Terças²

2017

Phys. Scr.

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Sympathetic laser cooling of a single mode graphene membrane coupled to an atomic cloud interacting via Casimir-Polder forces has been recently proposed. Here, we extend this study to the effect of secondary graphene membrane whose frequency may be far or close to resonance. We show that if the two mechanical modes are close together, it is possible to simultaneously cool both modes. Conversely, if the two frequencies are set far apart, the secondary mode does not affect the cooling of the first one. We also study the entanglement properties of the steady-state using the logarithmic negativity. We show how stationary mechanical entanglement between two graphene sheets can be generated by means of vacuum fluctuations. Moreover, we find that, within feasible experimental parameters, large steady-state acoustomechanical entanglement, i.e. entanglement between the phononic and mechanical mode, EN ≈ 5, can be generated.

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Section: Discussionsupporting

confidence: 90%

“…Ground-state cooling and large steady-state acoutomechanical entanglement, E N ≈ 5, is shown to be possible via Casimir-Polder interactions, in agreement with ref. [17].…”

Section: Acoustomechanical Entanglement In a Single Mode Membranementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cooling and entanglement of multimode graphene resonators via vacuum fluctuations

Ribeiro¹,

Terças²

2017

Phys. Scr.

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“…Through the log-parabolic model fitting, 12 fitting parameters can be obtained as β syn , β ic , log ν syn peak , log ν ic peak , log L syn peak , log L ic peak , and the spectral index α ν of each band: the radio (1.4 GHz), infrared (2.2 µm), optical (J band, 1250 nm), ultraviolet (250 nm), soft X-ray (1 keV) and γ-ray (20 GeV) bands (Fossati et al 1998;Nie et al 2014;Yang et al 2017). We can also calculate the physical parameters indirectly, including D, R, B and γ p .…”

Section: The Intrinsic Physical Parametersmentioning

confidence: 99%

“…We can also calculate the physical parameters indirectly, including D, R, B and γ p . In addition, we can calculate the γ-ray luminosity at E = 20 GeV by the following formula (Fan et al 2012(Fan et al , 2015Nie et al 2014;Yang et al 2017):…”

Section: The Intrinsic Physical Parametersmentioning

confidence: 99%

The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope

Ajello

Angioni

Axelsson

et al. 2020

ApJ

302

231

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In this paper, we have selected a sample of 64 teraelectronvolt blazars, with redshift, from those classified in the fourth Fermi Large Area Telescope source catalog a) . We have obtained the values of the relevant physical parameters by performing a log-parabolic fitting of the average-state multiwavelength spectral energy distributions. We estimate the range of the radiation zone parameters, such as the Doppler factor (D), the magnetic field strength (B), the radiative zone radius (R) and the peak Lorentz factor (γ p ) of nonthermal electrons. Here, we show that (1) there is a strong linear positive correlation between the intrinsic synchrotron peak frequency and the intrinsic inverse Compton scattering (ICs) peak frequency among different types of blazars; (2) if radio bands are excluded, the spectral index of each band is negatively correlated with the intrinsic peak frequency; (3) there is a strong linear negative correlation between the curvature at the peak and the intrinsic peak frequency of the synchrotron bump, and a weak positive correlation between the curvature at the peak and the intrinsic peak frequency of the ICs bump; (4) there is a strong linear positive correlation between the intrinsic ICs peak luminosity and intrinsic γ-ray luminosity and between the intrinsic ICs peak frequency and peak Lorentz factor;(5) there is a strong negative linear correlation between log B and log γ p ; and (6) there is no correlation between log R and log γ p .

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