Experimental Proposal: Verification of Spin Rectification via Vacuum Zero-Point Vibrations (Version 3.0)

Note on Parameters (Jan 2026): The attached PDF proposal mentions a conservative estimate of the vacuum zero-point temperature (T_zp ≈ 1 K). Please note that our latest theoretical derivation (see Geometric Origin of the Fine-Structure Constant, Tang 2026) has refined this prediction to T_zp ≈ 2.61 K. This higher value further enhances the predicted signal strength and confirms that standard 4 K cryogenic systems are well within the detection sensitivity range. Update Log (Version 3.0): This version addresses the feasibility inquiry regarding temperature requirements, establishing that the effect is detectable using standard liquid helium cryostats without the need for dilution refrigeration. Executive Summary Core Question: What temperature conditions are required to detect the vacuum spin rectification effect? Direct Answer: 1.5 K - 4 K is the "sweet spot". Standard liquid helium temperatures are sufficient for verification. Theoretical Basis: Within the SV-TGD 4.0 framework, the temperature dependence of the rectified voltage is: V_int(T) = A · (T + T_zp) where T_zp is the effective temperature of vacuum zero-point vibrations. While the PDF conservatively estimates this at 1 K, updated theory predicts T_zp ≈ 2.61 K, implying a stronger zero-bias signal at low temperatures. Experimental Design: Device: Chiral junctions (DNA/Peptides) sandwiched between Gold electrodes on an insulating Sapphire substrate. Method: Zero-Current Intercept Analysis. By measuring the I-V curve intercept shift under magnetic field reversal, we isolate the vacuum-induced electromotive force from resistive artifacts. Validation: The proposal outlines a phased implementation plan, starting with a rapid verification at 4 K (Phase A) followed by a systematic temperature scan (Phase B). Scientific Significance: A positive detection of a non-vanishing voltage intercept at T → 0 (or a plateau near 2.6 K) would constitute the first direct experimental evidence of the discrete, mechanical nature of the quantum vacuum.