Hymas et al. report the first experimental demonstration of superextensive electrical power extraction from a quantum battery under steady-state, low-intensity, incoherent illumination. Superextensivity means the output power of the system scales super-linearly with its size: doubling the number of molecules more than doubles the power output. This is not possible in a classical system, where power scales at most linearly with size. The super-linear scaling arises from collective quantum effects — specifically, from strong light–matter coupling induced by a microcavity, which creates polaritons: hybrid quantum states that are part photon, part molecular excitation, spread coherently across the entire system.
The architecture achieves a complete quantum battery charge-discharge cycle. Light is absorbed superextensively by the collective polariton state, transferred via intersystem crossing to a long-lived triplet state, and then extracted as a measurable electrical current through charge transport layers. The entire process operates in steady state — not as a transient pulse, but as a continuous, stable conversion of incoherent light into electrical power. This had been theorised but never demonstrated experimentally before this paper.
The bilateral framework derives all physical structure from three axioms: existence is relational (A1), no intersection is preferred (A2), the present is the locus where future meets past (A3). Superextensivity — super-linear scaling from collective quantum effects — is precisely what A1 predicts for any sufficiently coupled relational system. When existence is relational, the whole is structurally more than the sum of its parts, and this excess is measurable as super-linear scaling of any output that depends on the collective state.
| Hymas et al. (Light: Science & Applications, 2026) | Bilateral mesh framework |
|---|---|
| Strong light–matter coupling creates polaritons — hybrid collective quantum states spread coherently across all molecules in the cavity simultaneously | Axiom A1: existence is relational; every state is defined by its intersections. The polariton is a distributed bilateral crossing record — its coherence and its super-linear power arise from the relational structure of the mesh, not from the properties of any individual molecule |
| Superextensive scaling — power output grows faster than system size, because collective quantum effects amplify the response beyond what independent components could produce | components share a crossing record, the egress amplitude scales as \(N\) (coherent sum), so power — proportional to amplitude squared — scales as \(N^2\). This is the bilateral analogue of Dicke superradiance scaling \(P \propto N^2\): the quantitative signature of a fully relational collective state. Superextensivity (\(\alpha > 1\)) is the expected output of any system in which A1 holds and interactions are strong enough to realise it|
| Cascade of crossing events — superabsorption by polaritons, intersystem crossing to triplet state, charge extraction: each step actualises a potential into a record that drives the next stage | The bilateral prime ladder — the egress record of one crossing becomes the ingress potential of the next, forward in \(\tau\) (A3). The three-stage cascade (absorb, cross, extract) is the natural mode of bilateral propagation through a hierarchical mesh: each rung actualises the potential of the rung below |
Classical systems are extensive: power scales linearly with size because each component acts independently. Quantum systems under strong coupling are superextensive: the collective state amplifies the output because the components are not independent — they share a single crossing record. The transition from extensive to superextensive where relational effects are negligible — interactions are weak, molecules act approximately independently — to one where A1 dominates: each molecule is defined by its intersections with all others via the polariton field, and the collective crossing record is the physically relevant object.
The scaling law \(P \propto N^\alpha\) with \(\alpha > 1\) is the quantitative signature of bilateral existence. For independent molecules, \(\alpha = 1\). For a perfectly coupled collective state (Dicke superradiance limit), \(\alpha = 2\). The quantum battery of Hymas et al. achieves \(\alpha > 1\) in steady state — not as a transient, but continuously. This is significant: it means the relational collective structure is stable and persistent, not merely a fleeting quantum effect. It is a steady-state bilateral crossing record.
The fact that this works under incoherent illumination is particularly striking. The light source is not coherent — it provides no organised phase relationship between photons. Yet the collective quantum state of the cavity extracts superextensive power from it. In bilateral terms: the ingress potential need not be coherent for the egress record to be collective. A1 holds regardless of the quality of the input; what matters is the relational structure of the system, not the tidiness of the source. This is the same principle that underlies the bilateral account of room-temperature quantum coherence in photosynthesis: the mesh sustains its crossing structure regardless of thermal noise, because the structure is relational, not fragile.
The quantum battery of Hymas et al. is an energy device; the Möbius cascade (proposed in an accompanying paper on this site) is a computational device. But the underlying principle is the same: a collective relational quantum state, sustained in steady state, produces an output that scales super-linearly with the number of participating components. The quantum battery achieves this via strong light–matter coupling in a microcavity. The Möbius cascade achieves it via topological coupling in a superconducting ring.
The key difference is the output. The quantum battery extracts electrical power — a continuous egress record of photon-to-charge conversions. The Möbius cascade extracts a computation — a continuous egress record of weak measurement outcomes with topologically enforced periodicity. Both are steady-state bilateral cascades converting a collective ingress potential into a sequence of egress records, forward in \(\tau\), without exhausting the potential of the collective state.
Key references. K. Hymas et al., "Superextensive electrical power from a quantum battery," Light: Science & Applications 15, 168 (2026). DOI: 10.1038/s41377-026-02240-6. D. Low, "Infinity Zero: A Universal Synthesis of the Past, Present and Future," submitted to Foundations of Physics, April 2026 (ontologia.co.uk). D. Low, "Möbius Cascade: Topologically Sustained Weak-Collapse Computation," May 2026 (ontologia.co.uk). D. Low, "Quantum Coherence in Photosynthesis: A Biological Instance of Bilateral Cascade Propagation," May 2026 (ontologia.co.uk). Computational verification: github.com/dunstanlow/bilateral-mesh.