Zobrazeno 1 - 10
of 322
pro vyhledávání: '"Kaloper, Nemanja"'
Autor:
D'Amico, Guido, Kaloper, Nemanja
We consider a conformally coupled scalar QFT on $2+1$ dimensional static Einstein universe $R \times S^2$, and write down the free theory Hilbert space. We explain that this theory is secretly a QFT in $2+1$ de Sitter space because all the quantum ob
Externí odkaz:
http://arxiv.org/abs/2407.07942
Autor:
Kaloper, Nemanja, Westphal, Alexander
We propose using fuzzy axion dark matter to test the anthropic principle. A very light axion can be directly detectable, at least by black hole superradiance effects. The idea then is that gravitational and astrophysical observations can discover a l
Externí odkaz:
http://arxiv.org/abs/2404.02993
Autor:
Kaloper, Nemanja, Westphal, Alexander
We examine implications of the weak gravity conjecture for the mechanisms for discharging cosmological constant via membrane nucleations. Once screening fluxes and membranes which source them enter, and weak gravity bounds are enforced, a generic de
Externí odkaz:
http://arxiv.org/abs/2309.07223
Autor:
Kaloper, Nemanja
Linear axion monodromy models modulated with higher powers of fields naturally realize the quantum-mechanical flux discharge mechanism for relaxing the cosmological constant toward zero. Working with multiple copies of superposed linear and quadratic
Externí odkaz:
http://arxiv.org/abs/2307.10365
Autor:
Kaloper, Nemanja
We point out that time's arrow is naturally induced by quantum mechanical evolution, whenever the systems have a very large number ${\cal N}$ of non-degenerate states and a Hamiltonian bounded from below. When ${\cal N}$ is finite, the arrow is imper
Externí odkaz:
http://arxiv.org/abs/2305.15468
Autor:
Kaloper, Nemanja
General covariant unimodular gravity frameworks, based on the Henneaux-Teitelboim formulation, are, in disguise, precisely $4$-form field theories corrected with higher dimension operators. In the presence of charged tensional membranes, any de Sitte
Externí odkaz:
http://arxiv.org/abs/2305.02349
Autor:
D'Amico, Guido, Kaloper, Nemanja
Publikováno v:
Phys.Rev.D 106 (2022) 10, 103503
Based on entropy considerations and the arrow of time Penrose argued that the universe must have started in a special initial singularity with vanishing Weyl curvature. This is often interpreted to be at odds with inflation. Here we argue just the op
Externí odkaz:
http://arxiv.org/abs/2208.01048
Autor:
Arun, K. G., Belgacem, Enis, Benkel, Robert, Bernard, Laura, Berti, Emanuele, Bertone, Gianfranco, Besancon, Marc, Blas, Diego, Böhmer, Christian G., Brito, Richard, Calcagni, Gianluca, Cardenas-Avendaño, Alejandro, Clough, Katy, Crisostomi, Marco, De Luca, Valerio, Doneva, Daniela, Escoffier, Stephanie, Ezquiaga, Jose Maria, Ferreira, Pedro G., Fleury, Pierre, Foffa, Stefano, Franciolini, Gabriele, Frusciante, Noemi, García-Bellido, Juan, Herdeiro, Carlos, Hertog, Thomas, Hinderer, Tanja, Jetzer, Philippe, Lombriser, Lucas, Maggio, Elisa, Maggiore, Michele, Mancarella, Michele, Maselli, Andrea, Nampalliwar, Sourabh, Nichols, David, Okounkova, Maria, Pani, Paolo, Paschalidis, Vasileios, Raccanelli, Alvise, Randall, Lisa, Renaux-Petel, Sébastien, Riotto, Antonio, Ruiz, Milton, Saffer, Alexander, Sakellariadou, Mairi, Saltas, Ippocratis D., Sathyaprakash, B. S., Shao, Lijing, Sopuerta, Carlos F., Sotiriou, Thomas P., Stergioulas, Nikolaos, Tamanini, Nicola, Vernizzi, Filippo, Witek, Helvi, Wu, Kinwah, Yagi, Kent, Yazadjiev, Stoytcho, Yunes, Nicolas, Zilhao, Miguel, Afshordi, Niayesh, Angonin, Marie-Christine, Baibhav, Vishal, Barausse, Enrico, Barreiro, Tiago, Bartolo, Nicola, Bellomo, Nicola, Ben-Dayan, Ido, Bergshoeff, Eric A., Bernuzzi, Sebastiano, Bertacca, Daniele, Bhagwat, Swetha, Bonga, Béatrice, Burko, Lior M., Compere, Geoffrey, Cusin, Giulia, da Silva, Antonio, Das, Saurya, de Rham, Claudia, Destounis, Kyriakos, Dimastrogiovanni, Ema, Duque, Francisco, Easther, Richard, Farmer, Hontas, Fasiello, Matteo, Fisenko, Stanislav, Fransen, Kwinten, Frauendiener, Jörg, Gair, Jonathan, Gergely, Laszlo Arpad, Gerosa, Davide, Gualtieri, Leonardo, Han, Wen-Biao, Hees, Aurelien, Helfer, Thomas, Hennig, Jörg, Jenkins, Alexander C., Kajfasz, Eric, Kaloper, Nemanja, Karas, Vladimir, Kavanagh, Bradley J., Klioner, Sergei A., Koushiappas, Savvas M., Lagos, Macarena, Poncin-Lafitte, Christophe Le, Lobo, Francisco S. N., Markakis, Charalampos, Martin-Moruno, Prado, Martins, C. J. A. P., Matarrese, Sabino, Mayerson, Daniel R., Mimoso, José P., Noller, Johannes, Nunes, Nelson J., Oliveri, Roberto, Orlando, Giorgio, Pappas, George, Pikovski, Igor, Pilo, Luigi, Podolsky, Jiri, Pratten, Geraint, Prokopec, Tomislav, Qi, Hong, Rastgoo, Saeed, Ricciardone, Angelo, Rollo, Rocco, Rubiera-Garcia, Diego, Sergijenko, Olga, Shapiro, Stuart, Shoemaker, Deirdre, Spallicci, Alessandro, Stashko, Oleksandr, Stein, Leo C., Tasinato, Gianmassimo, Tolley, Andrew J., Vagenas, Elias C., Vandoren, Stefan, Vernieri, Daniele, Vicente, Rodrigo, Wiseman, Toby, Zhdanov, Valery I., Zumalacárregui, Miguel
The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders about the fundamental theory of nature at play in the extreme gravity regime, where the gravitational interaction is both strong and dynamical. In this white paper, the
Externí odkaz:
http://arxiv.org/abs/2205.01597
Autor:
Kaloper, Nemanja, Westphal, Alexander
We exhibit a mechanism which dynamically adjusts cosmological constant toward $0^+$. The adjustment is quantum-mechanical, discharging cosmological constant in random discrete steps. It renders de Sitter space unstable, and triggers its decay toward
Externí odkaz:
http://arxiv.org/abs/2204.13124
Autor:
Kaloper, Nemanja
Publikováno v:
Physical Review D 106 (2022) 4, 044023
We define `third derivative' General Relativity, by promoting the integration measure in Einstein-Hilbert action to be an arbitrary $4$-form field strength. We project out its local fluctuations by coupling it to another $4$-form field strength. This
Externí odkaz:
http://arxiv.org/abs/2202.08860