A tetrabenzophenazine low voltage single molecule XOR quantum Hamiltonian logic gate

Abstract

A tetrabenzo[a,c,j.h]phenazine molecule is functionning like a “2 input – 1 output” XOR Boolean logic gate using the quantum level repulsion effect of the Quantum Hamiltonian Computing approach. The logical inputs are performed using one aluminum atom per input. The logical output is measured by the dI/dV tunnelling spectrum at +1.1 V low bias voltage. On an Au(1 1 1) surface, each Al atom is manipulated in and out of the molecule by scanning tunnelling microscope molecular manipulations. This single molecule XOR gate functions without the need of cascading OR, AND and NAND gates inside its molecular structure.