SWSN SCIENTIFIC REVIEW SERIES SWSN-SCI/ORP-2035-04-R3 stress test draws 60,000 phase-noise trajectories with phase standard deviation 2.15 rad and evaluates fidelityF = (1+ cos ∆ϕ)/2 after efficiency-dependent feedback. The full executable script is part of the technical supplement. References [1] García-Pintos LP, Liu YK, Gorshkov AV (2026) Reshaping the Quantum Arrow of Time. Phys Rev X 16:011028. https://doi.org/10.1103/l18s-9vmh [2] Dressel J, Chantasri A, Jordan AN, Korotkov AN (2017) Arrow of time for continuous quantum measurement. Phys Rev Lett 119:220507. [3] Harrington PM, Tan D, Naghiloo M, Murch KW (2019) Characterizing a statistical arrow of time in quantum measurement dynamics. Phys Rev Lett 123:020502. [4] Wiseman HM, Milburn GJ (2009) Quantum Measurement and Control. Cambridge University Press, Cambridge. [5] Johansson JR, Nation PD, Nori F (2012) QuTiP: An open-source Python framework for the dynam- ics of open quantum systems. Comput Phys Commun 183:1760-1772. [6] Johansson JR, Nation PD, Nori F (2013) QuTiP 2: A Python framework for the dynamics of open quantum systems. Comput Phys Commun 184:1234-1240. [7] Aasi J et al. (2013) Parameter estimation for compact binary coalescence signals with the first generation gravitational-wave detector network. Phys Rev D 88:062001. [8] Penrose R (1969) Gravitational collapse: the role of general relativity. Riv Nuovo Cimento 1:252- 276. [9] Christodoulou D (1970) Reversible and irreversible transformations in black-hole physics. Phys Rev Lett 25:1596-1597. [10] Maeda K, Okabayashi K, Okawa H (2018) Maximal efficiency of the collisional Penrose process with spinning particles. Phys Rev D 98:064027. [11] Maldacena J, Susskind L (2013) Cool horizons for entangled black holes. Fortschr Phys 61:781- 811. [12] Jacobs K, Steck DA (2006) A straightforward introduction to continuous quantum measurement. Contemp Phys 47:279-303. CONTROLLED SCIENTIFIC DOCUMENT Internal review copy Page 9 of9