Joudioux, J.; Thaller , M.; Kroon , J. A. V.: The Conformal Einstein Field Equations with Massless Vlasov Matter. Annales de l'Institut Fourier (accepted)

Junker, J.; Wilken, D.; Huntington, E.; Heurs, M.: High-precision cavity spectroscopy using high-frequency squeezed light. Optics Express 29 (4), pp. 6053 - 6068 (2021)

Kastaun, W.; Kalinani, J. V.; Ciolfi, R.: Robust Recovery of Primitive Variables in Relativistic Ideal Magnetohydrodynamics. Physical Review D 103, 023018 (2021)

Kastaun, W.; Ohme, F.: Numerical Inside View of Hypermassive Remnant Models for GW170817. Physical Review D 104 (2), 023001 (2021)

Kaubruegger, R.; Vasilyev, D. V.; Schulte, M.; Hammerer, K.; Zoller, P.: Quantum Variational Optimization of Ramsey Interferometry and Atomic Clocks. Physical Review X 11, 041045 (2021)

Kawaguchi, K.; Fujibayashi, S.; Shibata, M.; Tanaka, M.; Wanajo, S.: A low-mass binary neutron star: long-term ejecta evolution and kilonovae with weak blue emission. The Astrophysical Journal 913 (2), 100 (2021)

Kawamura, S.; Ando, M.; Seto, N.; Sato, S.; Musha, M.; Kawano, I.; Yokoyama, J.; Tanaka, T.; Ioka, K.; Akutsu, T. et al.; Takashima, T.; Agatsuma, K.; Araya, A.; Aritomi, N.; Asada, H.; Chiba, T.; Eguchi, S.; Enoki, M.; Fujimoto, M.-K.; Fujita, R.; Futamase, T.; Harada, T.; Hayama, K.; Himemoto, Y.; Hiramatsu, T.; Hong, F.-L.; Hosokawa, M.; Ichiki, K.; Ikari, S.; Ishihara, H.; Ishikawa, T.; Itoh, Y.; Ito, T.; Iwaguchi, S.; Izumi, K.; Kanda, N.; Kanemura, S.; Kawazoe, F.; Kobayashi, S.; Kohri, K.; Kojima, Y.; Kokeyama, K.; Kotake, K.; Kuroyanagi, S.; Maeda, K.-i.; Matsushita, S.; Michimura, Y.; Morimoto, T.; Mukohyama, S.; Nagano, K.; Nagano, S.; Naito, T.; Nakamura, K.; Nakamura, T.; Nakano, H.; Nakao, K.; Nakasuka, S.; Nakayama, Y.; Nakazawa, K.; Nishizawa, A.; Ohkawa, M.; Oohara, K.; Sago, N.; Saijo, M.; Sakagami, M.; Sakai, S.-i.; Sato, T.; Shibata, M.; Shinkai, H.; Shoda, A.; Somiya, K.; Sotani, H.; Takahashi, R.; Takahashi, H.; Akiteru, T.; Taniguchi, K.; Taruya, A.; Tsubono, K.; Tsujikawa, S.; Ueda, A.; Ueda, K.-i.; Watanabe, I.; Yagi, K.; Yamada, R.; Yokoyama, S.; Yoo, C.-M.; Zhu, Z.-H.: Current status of space gravitational wave antenna DECIGO and B-DECIGO. Progress of Theoretical and Experimental Physics 2021 (5), 05A105 (2021)

Keitel, D.; Tenorio, R.; Ashton, G.; Prix, R.: PyFstat: a Python package for continuous gravitational-wave data analysis. Journal of Open Source Software 6 (60), 3000 (2021)

Khalouei, E.; Ghodsi, H.; Rahvar, S.; Abedi, J.: Possibility of Primordial Black holes as the source of gravitational wave events in the advanced LIGO detector. Physical Review D 103 (8), 084001 (2021)

Khera, N.; Ashtekar, A.; Krishnan, B.: Testing waveform models using angular momentum. Physical Review D 104 (12), 124071 (2021)

Khera, N.; Krishnan, B.; Ashtekar, A.; De Lorenzo, T.: Inferring the gravitational wave memory for binary coalescence events. Physical Review D 103 (4), 044012 (2021)

Kleinschmidt, A.; Nicolai, H.: Generalised holonomies and K(E9). Journal of High Energy Physics 2021 (9), 054 (2021)

Kreutzer , L. T.: Canonical analysis of E6(6)(R) invariant five dimensional (super-)gravity. Journal of Mathematical Physics 62 (3), 032302 (2021)

Kreutzer, L. T.: The canonical formulation of E6(6) exceptional field theory. Journal of high energy physics: JHEP 2021 (07), 145 (2021)

Krishnendu, N. V.; Ohme, F.: Testing general relativity with gravitational waves: An overview. Universe 7 (12), 497 (2021)

Kulkarni, S.; Capano, C.: On the reliability of parameter estimates in the first observing run of Advanced LIGO. Physical Review D 103 (10), 104002 (2021)

Kuroda, T.: Impact of a magnetic field on neutrino-matter interactions in core-collapse supernovae. The Astrophysical Journal 906 (2), 128 (2021)

Kyutoku , K.; Kawaguchi , K.; Kiuchi, K.; Shibata, M.; Taniguchi , K.: Reducing orbital eccentricity in initial data of black hole--neutron star binaries in the puncture framework. Physical Review D 103 (2), 023002 (2021)

Kyutoku , K.; Shibata, M.; Taniguchi , K.: Coalescence of black hole--neutron star binaries. Living Reviews in Relativity 24 (5) (2021)

Laszlo, A.; Andersson, L.: Nilpotent symmetries as a mechanism for Grand Unification. Journal of High Energy Physics 2021 (05), 240 (2021)