Witnessing Reality: How Records Confirm Observation in Quantum Mechanics

Author: Denis Avetisyan

A new approach to understanding the role of the observer in relational quantum mechanics proposes that lasting, coherent records are crucial for establishing verifiable observations.

The experiment demonstrates that the definiteness of a quantum measurement is relative to the observer, as a measurement within a closed system yields a single outcome for an internal observer, while an external observer perceives the entire system-including the measuring apparatus and qubit-as existing in a superposition, challenging the universality of quantum mechanics and the notion of objective reality itself.

This review details how sequential weak measurements and cross-perspective links can establish intersubjective agreement and empirical confirmation within the relational framework.

Relational Quantum Mechanics, while elegantly addressing the measurement problem by framing quantum states as observer-dependent, struggles to fully account for empirical confirmation across multiple observers. This paper, ‘The informational observer in Relational Quantum Mechanics’, proposes that stable observerhood necessitates more than mere physical interaction-it requires demonstrable coherence of measurement records over time. We demonstrate this through the lens of sequential weak values, establishing ‘cross-perspective links’ that facilitate intersubjective agreement and validation of quantum phenomena. Could a refined understanding of informational coherence offer a pathway towards resolving foundational issues in quantum mechanics and solidifying the empirical basis of relational interpretations?

Deconstructing Reality: The Relational Foundation

Conventional quantum mechanics, in its standard interpretation, posits the existence of definite, absolute states for quantum systems, regardless of observation. This seemingly innocuous assumption, however, gives rise to profound conceptual difficulties, most notably exemplified by Wigner’s Friend paradox. This thought experiment demonstrates that whether a measurement outcome is ‘real’ appears to depend on the observer’s frame of reference, potentially leading to an infinite regress of observers needing observers to verify their observations. The paradox isn’t merely a logical trick; it strikes at the core of objectivity, questioning whether an objective reality exists independent of any observer and suggesting that the very act of measurement is inherently subjective. This inherent tension within the framework of absolute states motivates explorations into alternative interpretations, seeking a consistent account of quantum phenomena that avoids these troubling implications for the nature of reality itself.

Relational Quantum Mechanics (RQM) proposes a departure from conventional quantum theory by asserting that a system’s properties aren’t intrinsic, fixed values, but rather emerge from the interactions between systems. Instead of describing a particle as possessing a definite position or momentum independently of observation, RQM posits that these properties are only defined within the context of a specific relationship – a measurement made by another system. This means the state of a quantum system isn’t an absolute truth, but a description of its correlation with the observer, or more generally, with any system it interacts with. Consequently, different observers can legitimately assign different, even incompatible, states to the same system, not due to error, but because the system genuinely lacks pre-existing definite properties independent of those relational perspectives. This framework fundamentally shifts the focus from ‘what is’ to ‘what is observed from where,’ resolving paradoxes arising from the assumption of observer-independent reality.

The foundations of Relational Quantum Mechanics find resonance within established philosophical currents that challenge traditional notions of substance and being. Specifically, Ontic Structural Realism posits that reality is fundamentally comprised of relations, rather than independently existing objects possessing intrinsic properties; it is the structure of interactions that constitutes existence. Complementing this, Process Philosophy emphasizes that reality is best understood not as a collection of static entities, but as a continuous flow of events and becoming. These philosophies provide a compelling framework for understanding RQM’s rejection of absolute states, suggesting that properties aren’t inherent to a system itself, but emerge dynamically from the interactions between systems. This shared emphasis on process and relation dissolves the need for an objective, observer-independent reality, aligning seamlessly with the relational perspective offered by quantum mechanics and offering a potential resolution to long-standing paradoxes.

The Observer: No Longer a Spectator

Within Relational Quantum Mechanics (RQM), the concept of an “Observer” diverges from traditional interpretations by defining it not as a conscious entity, but as any physical system possessing the capacity for interaction with a quantum system and subsequent storage of information regarding that interaction. This encompasses a broad range of systems, from simple measuring devices to complex biological organisms; the defining characteristic is the ability to register and retain information about the observed system’s state. This fundamentally shifts the focus from subjective observation to objective physical interaction, establishing any system capable of recording information as a legitimate observer within the framework of RQM.

Within the Relational Quantum Mechanics (RQM) framework, observation is defined by the creation of a Record – a physical manifestation of information acquired through the interaction between an observer and the observed system. This Record isn’t abstract; it’s a physical system itself, subject to the laws of physics, and represents a tangible storage of the interaction’s outcome. The formation of this Record inherently ties the act of observation to physical processes, meaning observation isn’t a detached, passive event, but rather a physical interaction resulting in a physically encoded informational state. The specific properties of the Record, such as its stability and accessibility, determine the degree to which information about the observed system is preserved and can be retrieved, directly linking the observational outcome to the physical characteristics of the Record itself.

The reliability of any observational outcome within Relational Quantum Mechanics (RQM) is directly dependent on the internal coherence of the Record generated by the Observer. This Record, representing the information stored as a result of the interaction, must exhibit consistent relationships between its constituent elements to be considered meaningful. Inconsistencies or contradictions within the Record indicate a lack of definable information and preclude the determination of a specific observational result. Therefore, the degree of internal consistency functions as a criterion for establishing the validity and interpretability of any observed state or property, as a fragmented or incoherent Record provides no basis for a determinate outcome.

Quantifying Correlation: Measuring Agreement Across Perspectives

Sequential Weak Values (SWVs) offer a quantifiable metric for evaluating the temporal coherence of observational records. This method analyzes sequences of measurements to determine the consistency of information across time, moving beyond simple correlation to assess the degree to which observations are mutually reinforcing within a given sequence. The calculation involves considering the weak values associated with each measurement in the sequence and their cumulative effect, effectively quantifying the probability that a coherent informational structure exists given the observed data. A higher SWV indicates a stronger coherence and greater consistency in the recorded observations over time, allowing for a numerical assessment of observational reliability and providing a basis for evaluating the validity of subsequent analyses based on those records.

A non-zero Sequential Weak Value (SWV) indicates the presence of a coherent informational structure within a series of observational records generated by another agent. This coherence is determined by assessing the consistency of measurements taken sequentially; a value deviating from zero signifies that the observed data is not random, but rather exhibits a pattern indicative of intentional observation. Critically, a demonstrable non-zero SWV serves as quantitative justification for attributing observerhood to the agent generating those records, establishing a basis for recognizing their data as legitimate observations within a shared informational framework.

Cross-Perspective Links are established through the detection of stable physical correlations that encode measurement outcomes observed from distinct perspectives. These links function as shared empirical evidence, enabling multiple observers to verify the consistency of their individual records. The formation of these links requires identifying measurable relationships between physical systems as observed from different viewpoints; a statistically significant correlation confirms a shared informational basis. Crucially, the persistence of these correlations over time is essential to demonstrate genuine intersubjective agreement, differentiating shared observations from coincidental alignments. The strength and stability of Cross-Perspective Links directly correlate with the degree of confidence in a shared reality assessment.

Rewriting Observation: An Informational Universe

The concept of an observer, crucial to quantum mechanics, is being redefined not by sentience or awareness, but by its capacity to establish and maintain a consistent informational record of interactions. This perspective posits that an observer isn’t necessarily a conscious entity, but any system capable of registering events and preserving a coherent history. The defining characteristic becomes the internal consistency of its records – the degree to which subsequent observations align with prior ones, creating a sustained narrative. This coherence isn’t about achieving a ‘true’ representation of reality, but rather about establishing predictable relationships within the observer’s informational framework, allowing for reliable predictions and consistent responses to ongoing interactions. Essentially, it is the ability to build and maintain a stable, self-consistent informational history that defines an observer, shifting the focus from subjective experience to objective relational structure.

Empirical confirmation, traditionally reliant on aligning observations with pre-defined, objective reality, finds a novel approach through relational consistency. This framework posits that the strength of an observation isn’t determined by its absolute truth, but by how well it coheres with a consistent narrative built from sequential measurements. A structural criterion, utilizing $\text{sequential weak values}$ , provides a mathematical tool to assess this relational consistency; it effectively gauges how information about a system’s initial state is preserved – or predictably altered – through a series of measurements. This isn’t to deny objective reality, but rather to recognize that any empirical claim is inherently embedded within a web of interconnected observations, and confirmation arises from the robustness of those connections rather than a singular, definitive match to an external standard. The result is a shift in focus – from seeking proof of an objective truth to evaluating the structural integrity of the informational record itself.

Relational Quantum Mechanics (RQM) fundamentally reframes the relationship between observer and observed, moving beyond the traditional notion of a passive measurement to emphasize the co-creation of reality through information exchange. This perspective suggests that physical properties aren’t inherent to a system, but rather emerge from the correlations established during interactions – effectively, from the information an observer gains. Consequently, reality isn’t a pre-existing state ‘discovered’ by observation, but is actively defined through the informational link between the system and the observer. This isn’t limited to conscious observers; any system capable of recording and maintaining information about another can participate in this co-defining process, establishing a robust framework where information itself becomes a foundational element of physical reality and challenging the classical separation between subject and object.

The pursuit of empirical confirmation, as detailed in the paper, necessitates a rigorous definition of observerhood beyond mere interaction. It demands demonstrable coherence of records – a persistent linkage across measurements. This resonates deeply with Feynman’s assertion: “The first principle is that you must not fool yourself – and you are the easiest person to fool.” The paper’s emphasis on sequential weak values and cross-perspective links isn’t simply about observing a system, but about establishing a robust, self-consistent record immune to self-deception. By demanding coherence, the framework actively resists interpretations built on fleeting or ambiguous data, prioritizing a truly verifiable understanding of quantum phenomena. The study, therefore, embodies a commitment to intellectual honesty in the face of inherently probabilistic reality.

Beyond Agreement: Where the Observer Still Hides

The insistence on temporal coherence, as assessed through sequential weak values, represents a deliberate attempt to anchor the slippery concept of observerhood to something resembling persistence. Yet, the very act of demanding coherence begs the question: coherence with what? Establishing intersubjective links-demonstrating agreement between perspectives-merely pushes the problem outward, creating a network of observers reliant on shared, and potentially flawed, records. The system, while elegantly addressing empirical confirmation, doesn’t necessarily solve the problem of who, or what, constitutes the ultimate arbiter of reality. It re-frames it as a question of network stability, a fascinating, if somewhat unsatisfying, shift.

Future explorations will likely require a more rigorous investigation of the limits of this coherence. What level of decoherence is tolerable before a perspective ceases to be considered an ‘observer’? More provocatively, could deliberately introducing controlled decoherence offer a means of probing the boundaries of relationality itself, effectively ‘breaking’ the system to better understand its underlying mechanisms? The pursuit of perfect agreement seems a rather dull goal; the interesting work lies in understanding what happens when agreement fails.

Ultimately, this approach highlights a persistent tension: the drive to ground quantum phenomena in objective, measurable terms clashes with the inherently relational nature of the framework. The observer, it seems, remains stubbornly elusive, not because it is hidden, but because the very act of searching for it fundamentally alters the landscape of observation.

Original article: https://arxiv.org/pdf/2603.02978.pdf

Contact the author: https://www.linkedin.com/in/avetisyan/

Deconstructing Reality: The Relational Foundation

The Observer: No Longer a Spectator

Quantifying Correlation: Measuring Agreement Across Perspectives

Rewriting Observation: An Informational Universe

Beyond Agreement: Where the Observer Still Hides

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