Investigating Quantum Entanglement for Secure Communication Systems

Abstract

By use of simulation, qualitative validation, and mathematical modelling, the paper studies the role of quantum entanglement as a means of secure communication system.  To gauge their eavesdropping defence, pairs of entangled photons were modelled according to the density matrix approach, and simulated at different noise intensities and channel lengths.  Quantum bit error rate (QBER), mutual information rate plots between legitimate users and eavesdropper, Bell inequality violation as a demonstration of genuine entanglement were some very important indicators of performance.  An examination of this showed Monte Carlo simulation indicated that (QBER) was lower than the parameter required to secure an adequate method of distributing keys, and that mutual information favoured a legitimate channel.  The results have shown that transmission security can also be achieved in practical settings with the theoretical criterion I(A;B)I(A;B) > I(A;E) being true.  The entanglement-based system practical solutions and their viability and socio-ethical implications were emphasized, which added more corroborative evidence through qualitative expert reviews.  A critical evaluation was created based on a complex of quantitative and qualitative techniques, and the result has been writing down that quantum entanglement is highly advantageous as compared to classical cryptography practices.  The paper also emphasizes entanglement as a key enabler of next-generation communication security, particularly in the wake of threat posed to conventional computing by quantum computing, in spite of the technical challenges of photon loss and decoherence.