Linear Operators on Biological Nucleotide Networks: A Hamiltonian Framework for Exploring Quantum Tunneling and Coherence
This exploratory project proposes a simplified quantum model in which DNA and RNA nucleotides are represented as basis states of a finite-dimensional Hilbert space. Linear operators describe transitions between biologically allowed base pairs (A–T, G–C, A–U) as well as hypothetical non-natural pairings (A–A, G–G, C–C, T–T, U–C, U–G).
The resulting interaction matrix is interpreted as an effective Hamiltonian whose eigenspectrum is obtained through diagonalization. Spectral decomposition and Fourier analysis are then used to investigate the temporal evolution of the system and the role of quantum tunneling under different coupling scenarios.
Rather than attempting to demonstrate biological quantum coherence directly, the objective is to compare how biologically realistic and hypothetical interaction networks modify the energy spectrum, transition probabilities, coherent dynamics, and possible localization effects.
This framework aims to provide a computational platform for exploring whether specific nucleotide interaction topologies generate distinct quantum dynamical signatures that could motivate future theoretical and experimental investigations related to mutation mechanisms and quantum biological processes.
If nucleotide interactions are modeled as a finite-dimensional Hamiltonian, can different biologically plausible and hypothetical coupling topologies generate qualitatively different quantum dynamical behavior?
Represent each nucleotide as an orthonormal basis state
∣A⟩,∣G⟩,∣C⟩,∣T⟩,∣U⟩|A\rangle, |G\rangle, |C\rangle, |T\rangle, |U\rangle∣A⟩,∣G⟩,∣C⟩,∣T⟩,∣U⟩
forming a five-dimensional Hilbert space.
Assign Physical Parameters
Each nucleotide receives an effective energy
EA, EG, EC, ET, EUE_A,\; E_G,\; E_C,\; E_T,\; E_UEA,EG,EC,ET,EU
These values may initially come from literature or may simply be normalized exploratory parameters.
Construct the Hamiltonian
Diagonal terms
represent intrinsic nucleotide energies
Off-diagonal terms
represent coupling strengths
Examples
Natural couplings
A–T
G–C
A–U
Exploratory couplings
A–A
G–G
C–C
T–T
U–C
U–G
The Hamiltonian becomes
H=(EAJAGJACJATJAUJGAEGJGCJGTJGUJCAJCGECJCTJCUJTAJTGJTCETJTUJUAJUGJUCJUTEU)H= \begin{pmatrix} E_A & J_{AG} & J_{AC} & J_{AT} & J_{AU}\\ J_{GA}&E_G&J_{GC}&J_{GT}&J_{GU}\\ J_{CA}&J_{CG}&E_C&J_{CT}&J_{CU}\\ J_{TA}&J_{TG}&J_{TC}&E_T&J_{TU}\\ J_{UA}&J_{UG}&J_{UC}&J_{UT}&E_U \end{pmatrix}H=EAJGAJCAJTAJUAJAGEGJCGJTGJUGJACJGCECJTCJUCJATJGTJCTETJUTJAUJGUJCUJTUEU
Compute
Eigenvalues
Eigenvectors
Degeneracies
Symmetry properties
Spectral gaps
Propagate an arbitrary initial quantum state
∣ψ(t)⟩=e−iHt∣ψ(0)⟩|\psi(t)\rangle = e^{-iHt} |\psi(0)\rangle∣ψ(t)⟩=e−iHt∣ψ(0)⟩
Observe
Probability amplitudes
Oscillatory behavior
Population transfer
Long-term stability
Transform the temporal evolution
into frequency space
to identify
Compare three interaction networks
Only biological base pairs