Huarcaya, V.; Apelbaum, G.; Haendchen, V.; Wang, Q.; Heinzel, G.; Mehmet, M.: Five degrees of freedom test mass readout via optical levers. Classical and Quantum Gravity 37 (2), 025004 (2020)

Ijjas, A.; Cook, W. G.; Pretorius, F.; Steinhardt, P. J.; Davies, E. Y.: Robustness of slow contraction to cosmic initial conditions. Journal of Cosmology and Astroparticle Physics 2020 (8), 030 (2020)

Ishikawa, R.; Ketov, S. V.: Gravitino condensate in N=1 supergravity coupled to the N=1 supersymmetric Born-Infeld theory. Progress of Theoretical and Experimental Physics 2020 (1), 013B05 (2020)

Isi, M.; Sun, L.; Brito, R.; Melatos, A.: Erratum: Directed searches for gravitational waves from ultralight bosons (vol 99, 084042, 2019). Physical Review D 102 (4), 049901 (2020)

Islam, T.; Mehta, A. K.; Ghosh, A.; Varma, V.; Ajith, P.; Sathyaprakash, B. S.: Testing the no-hair nature of binary black holes using the consistency of multipolar gravitational radiation. Physical Review D 101 (2), 024032 (2020)

Joudioux, J.: Hörmander’s method for the characteristic Cauchy problem and conformal scattering for a nonlinear wave equation. Letters in Mathematical Physics 110 (6), S. 1391 - 1423 (2020)

Kaderli, A.: A note on the Drinfeld associator for genus-zero superstring amplitudes in twisted de Rham theory. Journal of Physics A 53 (41), 415401 (2020)

Karg, T. M.; Gouraud, B.; Ngai, C. T.; Schmid, G.-L.; Hammerer, K.; Treutlein, P.: Light-mediated strong coupling between a mechanical oscillator and atomic spins one meter apart. Science 369 (6500), S. 174 - 179 (2020)

Kawaguchi, K.; Shibata, M.; Tanaka, M.: Diversity of Kilonova Light Curves. The Astrophysical Journal 889 (2), 171 (2020)

Kawaguchi, K.; Shibata, M.; Tanaka, M.: Constraint on the ejecta mass for a black hole-neutron star merger event candidate S190814bv. The Astrophysical Journal 893 (2), 153 (2020)

Khalil, M.; Steinhoff, J.; Vines, J.; Buonanno, A.: Fourth post-Newtonian effective-one-body Hamiltonians with generic spins. Physical Review D 101 (10), 104034 (2020)

Khan, S.; Ohme, F.; Chatziioannou , K.; Hannam , M.: Including higher order multipoles in gravitational-wave models for precessing binary black holes. Phyisical Review D 101 (2), 024056 (2020)

Kirchhoff, R.; Mow-Lowry, C.M.; Bergmann, G.; Hanke, M.; Koch, P.; Köhlenbeck, S.; Leavey, S.; Lehmann, J.; Oppermann, P.; Wöhler, J. et al.; Wu, D.; Lück, H.; Strain, K. A.: Local active isolation of the AEI-SAS for the AEI 10 m prototype facility. Classical and Quantum Gravity 37 (11), 115004 (2020)

Kiuchi, K.; Kawaguchi, K.; Kyutoku , K.; Sekiguchi , Y.; Shibata, M.: Sub-radian-accuracy gravitational waves from coalescing binary neutron stars II: Systematic study on the equation of state, binary mass, and mass ratio. Physical Review D 101, 084006 (2020)

Klausen , R. P.: Hypergeometric Series Representations of Feynman Integrals by GKZ Hypergeometric Systems. Journal of High Energy Physics 2020 (4), 121 (2020)

Kojima, R.; Rao, J.: Triangulation-free Trivialization of 2-loop MHV Amplituhedron. Journal of High Energy Physics 2020 (10), 140 (2020)

Krishnendu , N. V.; Yelikar, A. B.: Testing the Kerr nature of intermediate-mass and supermassive black hole binaries using spin-induced multipole moment measurements. Classical and Quantum Gravity 37 (20), 205019 (2020)

Kühnel, F.; Matas, A.; Starkman, G. D.; Freese, K.: Waves from the Centre: Probing PBH and other Macroscopic Dark Matter with LISA. The European Physical Journal C 80 (7), 627 (2020)

Kuzenko , S. M.; Schwimmer , A.; Theisen, S.: Comments on Anomalies in Supersymmetric Theories. Journal of Physics A: Mathematical and Theoretical 53 (6), 064003 (2020)

Kyutoku, K.; Fujibayashi, S.; Hayashi, K.; Kawaguchi, K.; Kiuchi, K.; Shibata, M.; Tanaka , M.: On the Possibility of GW190425 Being a Black Hole-Neutron Star Binary Merger. Astrophysical Journal Letters 890 (1), L4 (2020)