Work

Thermal Phase Noise and the Temperature Ceiling for Reliable Fifth-Coordinate Readout

Year: 2026

Type: article

Abstract: Thermal agitation blurs any coordinate held in a potential, and the phase coordinate is no exception. This paper models the phase as held by a harmonic stiffness kappa = 4.142e-17 J per rad^2, calibrated so the thermal phase spread is 0.01 rad at 300 K, and computes the temperature ceiling for reliable readout. The spread reaches the 0.0667 rad budget only at 13347 K, and a stricter 0.02 rad working margin holds up to 1200 K. At 4000 K the spread is still only 0.0365 rad. Under the stated stiffness, thermal noise is therefore not the limiting factor for phase readout at any ordinary operating temperature; cryogenics are unnecessary for this purpose, and readout error budgets should be assigned to dispersion and drift instead. Computed from stated assumptions; not measured. SIMULATED, NOT MEASURED.

Source: Zenodo (CERN European Organization for Nuclear Research)

DOI: 10.5281/zenodo.24123569

Author: Aldred, William Alexander

Language: English

Topic: Quantum Information and Cryptography

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W7225785317

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