التفاصيل البيبلوغرافية
| العنوان: |
Electric shocks: bounding Einstein-Maxwell theory with time delays on boosted RN backgrounds. |
| المؤلفون: |
Cremonini, Sera, McPeak, Brian, Tang, Yuezhang |
| المصدر: |
Journal of High Energy Physics; May2024, Vol. 2024 Issue 5, p1-35, 35p |
| مصطلحات موضوعية: |
ELECTRIC shock, DISPERSION relations, ELECTROMAGNETISM, COSMOLOGICAL constant, BLACK holes, SCALAR field theory, FIELD theory (Physics) |
| People: |
EINSTEIN, Albert, 1879-1955 |
| مستخلص: |
The requirement that particles propagate causally on non-trivial backgrounds implies interesting constraints on higher-derivative operators. This work is part of a systematic study of the positivity bounds derivable from time delays on shockwave backgrounds. First, we discuss shockwaves in field theory, which are infinitely boosted Coulomb-like field configurations. We show how a positive time delay implies positivity of four-derivative operators in scalar field theory and electromagnetism, consistent with the results derived using dispersion relations, and we comment on how additional higher-derivative operators could be included. We then turn to gravitational shockwave backgrounds. We compute the infinite boost limit of Reissner-Nordström black holes to derive charged shockwave backgrounds. We consider photons traveling on these backgrounds and interacting through four-derivative corrections to Einstein-Maxwell theory. The inclusion of gravity introduces a logarithmic term into the time delay that interferes with the straightforward bounds derivable in pure field theory, a fact consistent with CEMZ and with recent results from dispersion relations. We discuss two ways to extract a physically meaningful quantity from the logarithmic time delay — by introducing an IR cutoff, or by considering the derivative of the time delay — and comment on the bounds implied in each case. Finally, we review a number of additional shockwave backgrounds which might be of use in future applications, including spinning shockwaves, those in higher dimensions or with a cosmological constant, and shockwaves from boosted extended objects. [ABSTRACT FROM AUTHOR] |
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