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Akademický článek
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Vacuum polarization is numerically investigated for the interaction between a GeV electron beam and a counterpropagating ultraintense laser pulse in the quantum radiation dominated-regime (QRDR). We identify a signal of vacuum polarization in pair de
Externí odkaz:
http://arxiv.org/abs/2412.00745
The new gauge boson $Z'$ in $U(1)_{B-L}$ is widely considered as the mediator of dark matter. In this paper, we propose the conversion-driven dark matter in $U(1)_{B-L}$. The dark sector contains two Dirac fermions $\tilde{\chi}_1$ and $\tilde{\chi}_
Externí odkaz:
http://arxiv.org/abs/2411.06744
High-energy vortex $\gamma$ photons have significant applications in many fields, however, their generation and angular momentum manipulation are still great challenges. Here, we first investigated the generation of vortex $\gamma$ photons with contr
Externí odkaz:
http://arxiv.org/abs/2410.20658
Autor:
Li, Jing-Jing, Pyatkin, Valentina, Kleiman-Weiner, Max, Jiang, Liwei, Dziri, Nouha, Collins, Anne G. E., Borg, Jana Schaich, Sap, Maarten, Choi, Yejin, Levine, Sydney
The ideal LLM content moderation system would be both structurally interpretable (so its decisions can be explained to users) and steerable (to reflect a community's values or align to safety standards). However, current systems fall short on both of
Externí odkaz:
http://arxiv.org/abs/2410.16665
Extracting time-varying latent variables from computational cognitive models is a key step in model-based neural analysis, which aims to understand the neural correlates of cognitive processes. However, existing methods only allow researchers to infe
Externí odkaz:
http://arxiv.org/abs/2406.14742
Akademický článek
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Autor:
CUNLIFFE, TOM
Publikováno v:
China Perspectives, 2020 Jan 014 (123), 59-60.
Externí odkaz:
https://www.jstor.org/stable/26975313
The creation of polarized electron-positron pairs by the nonlinear Breit-Wheeler process in short laser pulses is investigated using the Baier-Katkov semiclassical method beyond local-constant-field approximation (LCFA), which allows for identifying
Externí odkaz:
http://arxiv.org/abs/2401.13250
Autor:
Lu, Xiao-Tong, Guo, Feng, Liu, Yan-Yan, Xia, Jing-Jing, Zhao, Guo-Dong, Chen, Ying-Xin, Wang, Ye-Bing, Lu, Ben-Quan, Chang, Hong
We report a measurement of the radiative lifetime of the $5s5p \; {}^{\rm{3}}P^{\rm{o}}_{\rm{0}}$ metastable state in ${}^{87}$Sr, which is coupled to the 5$s^{\rm{2}} \;$ ${}^{\rm{1}}S_{\rm{0}}$ ground state via a hyperfine-induced electric dipole t
Externí odkaz:
http://arxiv.org/abs/2401.11173