SWSN SCIENTIFIC REVIEW SERIES SWSN-SCI/ORP-2035-04-R3
1 Introduction
Microscopic equations can possess time-reversal symmetries while macroscopic observa-
tions exhibit an arrow of time. In monitored quantum systems, measurement backaction
itself contributes to an operational arrow that can be quantified from trajectories. García-
Pintos, Liu and Gorshkov recently constructed Hamiltonian control tools capable of replicat-
ing monitored stochastic trajectories and, with feedback, producing dynamics more consis-
tent with the time-reversed trajectory than the forward one [1]. This result is not a recipe
for reversing people, planets or entropy. It is nevertheless important for a different reason:
it demonstrates that the direction assigned to a monitored trajectory can be reshaped by
control when the relevant measurement record and dynamics are known.
Our national monitoring program faces a structurally different inverse problem. Residuals
remain after accepted models are fitted separately to timing, gravimetric, orbital, geomag-
netic and environmental forecasting systems. The conventional interpretation is that these
residuals arise from calibration error, unmodelled local forcing, model mismatch and non-
stationary infrastructure. That interpretation remains the null hypothesis of this manuscript.
We ask a narrower question:is there a common latent perturbation whose statistical footprint
survives independent preprocessing pipelines?If so, the next task is not to declare a new uni-
verse. It is to design observations that could falsify both conventional and nonconventional
explanations.
For internal work, the inverse-control family is namedORPHEUS. The name is deliberately
cautionary. In the myth, Orpheus attempts to retrieve what has already been lost. MCSR
has the opposite objective: it does not seek to recover the dead or reconstruct a previous
world. It seeks, if the model survives testing, to restore a dynamically reachable boundary
condition from which forward evolution can continue.
2 Epistemic status and scope
The framework contains three different levels of claim. They must not be conflated.
Level Status Use in this manuscript
E0 Established or standard
physics
Open-system dynamics, conditional
quantum trajectories, general rel-
ativity, Kerr rotational energy,
gravitational-wave parameter esti-
mation.
H1 High-risk extrapolation Scaling inverse-control ideas from
small monitored systems to a dis-
tributed engineered control architec-
ture.
H2 Phenomenological conjecture Inter-branch metric overlap (IBMO),
non-orientable boundary identifica-
tion and a controllable causal bound-
ary defect.
Table 1:Claim levels. H2 is not treated as established physics.
The central scientific requirement is therefore simple: every H2 claim must imply an obser-
vation that could fail.
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