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Vibrational Quantum Olfaction

Kryptur Research presents DFT vibrational analysis, WKB tunneling through the HCN elimination barrier, and IETS fingerprints linking benzaldehyde and hydrogen cyanide in almond cyanide biology.

10.5281/zenodo.20691555 Raja Ram GitHub

HCN barrier

kcal/mol · quartic elimination profile

Tunnel half-life

26 ps

vs. 257 ps classical at 300 K

IETS peak ΔV

1.2 meV

Benzaldehyde vs. HCN · 10 cm⁻¹ separation

Tunnel enhancement

~10×

k = 2.69×10⁻² s⁻¹ corrected rate

Research highlights

Vibrational Quantum Olfaction: Quantum Tunneling, HCN Elimination, and Inelastic Electron Tunneling Spectroscopy in Almond Cyanide Biology

Research Paper

Raja Ram · Muskan S · Vipul Jain · Kalinga Swain

June 2026

IETS peaks for benzaldehyde (2080 cm⁻¹, 0.257 V) and HCN (2090 cm⁻¹, 0.259 V) differ by only 1.2 meV — within receptor linewidth — supporting the vibrational theory of olfaction and quantum-accelerated toxin release.

Quantum BiologyIETSTunneling

Simulated IETS dI/dV spectra — benzaldehyde, HCN, control

Figure 1

Combination band vs. C≡N stretch

SpectroscopyOlfaction

Peak region zoom — indistinguishable olfactory activation

Figure 2

ΔV = 0.002 V ≡ 1.2 meV

BenzaldehydeHCN

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Results & figures

Table 1. IETS peak voltages and frequency separation

Molecule	Vibration	IETS Peak (V)
Benzaldehyde	Combination band (2080 cm⁻¹)	0.257
HCN	C≡N stretch (2090 cm⁻¹)	0.259
Peak separation	ΔV = 0.002 V	1.2 meV (10 cm⁻¹)

Table 2. HCN elimination kinetics at 300 K

Model	Rate (s⁻¹)	Half-life
Classical (TST)	2.69×10⁻³	257 ps
WKB tunnel-corrected	2.69×10⁻²	26 ps

Simulated inelastic electron tunnelling spectrum for benzaldehyde, HCN, and control mode — **Figure 1.** Simulated IETS spectrum (dI/dV) for benzaldehyde (combination band, 2080 cm⁻¹), HCN (C≡N stretch, 2090 cm⁻¹), and a control mode (1500 cm⁻¹). Vertical dashed lines mark vibrational onsets.

Detailed IETS comparison for benzaldehyde and HCN in the vibrational peak region — **Figure 2.** Detailed IETS comparison in the ~2080 cm⁻¹ region. The 1.2 meV separation lies within typical experimental linewidths, supporting indistinguishable olfactory activation.

Full paper, dashboard & data

Research Paper: https://doi.org/10.5281/zenodo.20691555 · Open access · Zius Quantum R&D Center · Kryptur OU

Research Paper

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