DOAJ
Open Access
2024
Quantum-gravitational null Raychaudhuri equation
Sang-Eon Bak
Maulik Parikh
Sudipta Sarkar
Francesco Setti
Abstrak
Abstract We consider a congruence of null geodesics in the presence of a quantized spacetime metric. The coupling to a quantum metric induces fluctuations in the congruence; we calculate the change in the area of a pencil of geodesics induced by such fluctuations. For the gravitational field in its vacuum state, we find that quantum gravity contributes a correction to the null Raychaudhuri equation which is of the same sign as the classical terms. We thus derive a quantum-gravitational focusing theorem valid for linearized quantum gravity.
Topik & Kata Kunci
Penulis (4)
S
Sang-Eon Bak
M
Maulik Parikh
S
Sudipta Sarkar
F
Francesco Setti
Akses Cepat
Informasi Jurnal
- Tahun Terbit
- 2024
- Sumber Database
- DOAJ
- DOI
- 10.1007/JHEP07(2024)214
- Akses
- Open Access ✓