Hamiltonian thresholds for objective records
Jie Gu
Phys. Rev. A 114, L020201 (2026) - Published 13 August, 2026
The author demonstrates that quantum objectivity does not scale monotonically with environment size, but instead exists within a certified “two-edge” observer window bounded by record distinguishability and residual dephasing. By identifying local environmental asymmetry as the fundamental resource driving readable records, this study exposes why a bath can efficiently decohere a system while still failing to forge a shared classical reality.
Fractional power-law decay in the spontaneous emission of a two-level system
Hiroki Nakabayashi, Hayato Kinkawa, Takano Taira, and Naomichi Hatano
Phys. Rev. A 114, L020202 (2026) - Published 25 August, 2026
The authors reveal a fractional power-law decay in the spontaneous emission of a two-level system in the short- and long-time regimes. The fractional exponent is determined by the dispersion relation and spatial dimension of the environment.
















