Testing Quantum Coherence Reconstructibility in Mesoscopic Systems
Experimental extension of the OFID-G framework
This page presents a concrete experimental framework for testing whether quantum coherence can always be fully reconstructed from experimentally accessible information in mesoscopic systems, under controlled variations of an effective gravitational configuration.
In simple terms, the proposed experiment tests whether quantum coherence, although globally preserved, can always be fully reconstructed from experimentally accessible information.
The problem addressed here is whether all observed limitations to coherence reconstructibility can be fully explained by calibrated environmental decoherence, or whether a residual limitation may persist under controlled conditions. The experiment does not test coherence loss itself, but the completeness of its reconstruction from accessible information, by comparing reconstructed and predicted quantum states under standard dynamics.
Overview
The experimental strategy is based on statistical state reconstruction in mesoscopic systems, with particular emphasis on levitated optomechanical platforms and related configurations where quantum control, isolation, and repeated measurements are experimentally accessible.
Rather than introducing any modification of quantum dynamics, the protocol tests whether all observed decoherence effects can be fully accounted for by standard environmental mechanisms after independent calibration and control of the dominant channels.
In this setting, the relevant quantity is a measurable deviation between the state reconstructed after evolution and the state predicted from the reconstructed initial condition under standard quantum dynamics. For near-Gaussian states, this comparison is naturally expressed in terms of covariance matrices.
The corresponding observable is the deviation Δ between measured and predicted covariance matrices. Under the null hypothesis of full reconstructibility, Δ should remain statistically compatible with zero under a monotonic scan of the controlled parameter λ, or equivalently of the effective phenomenological parameter Ξ.
By contrast, a residual, reproducible, and parameter-dependent deviation that persists after recalibration and cannot be reduced to known decoherence channels would constitute the relevant experimental signature of a breakdown of reconstructibility.
Operational logic
The protocol follows a simple logic. First, the initial state is reconstructed. Second, the system evolves under controlled conditions including calibrated environmental decoherence and a tunable effective gravitational configuration. Third, the final state is reconstructed from measurement data and compared with the state predicted under standard dynamics.
The key issue is therefore not whether coherence is lost in a generic sense, but whether the information required to reconstruct the state remains fully accessible when external parameters are varied under otherwise controlled conditions.
In this perspective, the test does not seek a new decoherence law. It probes whether standard decoherence modeling is operationally complete, or whether a residual contribution δres persists beyond the reach of environmental explanation.
Expected signatures
Under standard quantum dynamics, once all relevant decoherence channels are calibrated, the measured residual should remain compatible with zero within experimental uncertainties.
The signature of interest is therefore a residual contribution that is:
reproducible, parameter-dependent, robust under recalibration, and not reducible to known environmental decoherence mechanisms.
Such a signal may appear either as a gradual departure from the predicted behavior over a region of parameter space or as a more threshold-like transition. In both cases, the essential point is that it remains operationally distinguishable from standard decoherence.
The phenomenological interpretation of such signatures, including residual floors, threshold-like behavior, and null results, is developed in the Constraints framework.
Preprint
📄 DOI: 10.5281/zenodo.19351945
Zenodo: View on Zenodo