In the Cosmological Braking Theory (CBT), the apparent accelerated expansion of the Universe arises from temporal dilation of matter clocks by a cosmological electromagnetic condensate: dτₘatter = √D (z) dtcoord, where D (z) = 1 − Ωf (1+z) ³ + Ωf² (1+z) ⁶ and Ωf = Ωₘ α = 2. 30×10⁻³. This mechanism predicts a qualitatively new ultimate fate of the Universe, which we name the Big Release. In the asymptotic future (z → −1, a → ∞), D (z) → 1 and γ (z) = 1/√D (z) → 1: matter clocks resynchronise with coordinate time. The apparent acceleration vanishes — not because dark energy decays, but because the observers' clocks return to their natural rate. This result is an exact algebraic consequence of D (z) and is independent of the initial conditions at the Big Bang. A residual true expansion driven by Ω_Λ = 0. 6826 continues, but without apparent acceleration. The dynamics of the Big Release unfold in five acts: (1) Big Bang (CBT = ΛCDM for z > 6. 539) ; (2) Quantum rebound at zc = 6. 539 (third-order phase transition, dilation begins) ; (3) The Tension — elastic maximum at z ≈ 4. 988 where 1−D = 25%, not at zc; (4) The Release — progressive relaxation from z ≈ 5 to the asymptotic future; (5) Big Release — D = 1, γ = 1, SᵥN → 0, the illusion of acceleration is over. The Big Release is the only cosmological end scenario governed by observer resynchronisation rather than by a change in the properties of dark energy, and the only one with zero free parameters. The von Neumann entropy of the EM condensate SᵥN (z) = 2 ln G (z) traces a complete cycle in Hilbert space: 0 at zc → 3. 257 today → 0 in the asymptotic future. This is not a cycle in physical space but a quantum recurrence of the condensate ground state. The Big Release has a deep connection to the observer-dependence of quantum measurement: the apparent acceleration is a property of the system-observer relation (matter clocks entangled with the condensate), not of the Universe alone — in precise analogy with the dependence of quantum measurement outcomes on the state of the measuring apparatus. The connection is conceptual, not a formal derivation. A testable prediction: the jerk parameter j (z) = − (1+z) dq/dz − q (1+2q) deviates from j = −1 (the ΛCDM value) throughout 0 < z < zc = 6. 539, with a divergence near zc (signature of the third-order phase transition). This is measurable by Euclid and LSST at z < 2.
François-Xavier Cerniac (Tue,) studied this question.