Quantum transitions and quantum entanglement from Dirac-like dynamics simulated by trapped ions

TL;DR

This paper models Dirac-like quantum systems using trapped ions, providing analytical tools for understanding quantum transitions and entanglement, and shows how interactions influence entanglement dynamics in these simulated relativistic systems.

Contribution

It introduces a novel simulation of Dirac-like Hamiltonians with trapped ions, linking internal degrees of freedom to quantum entanglement analysis.

Findings

Analytical expressions for ionic quantum transition probabilities.

Identification of internal degrees of freedom related to parity and spin.

Carrier interactions suppress quantum entanglement.

Abstract

Quantum transition probabilities and quantum entanglement for two-qubit states of a four level trapped ion quantum system are computed for time-evolving ionic states driven by Jaynes-Cummings Hamiltonians with interactions mapped onto a $\mbox{SU}(2)\otimes \mbox{SU}(2)$ group structure. Using the correspondence of the method of simulating a $3+1$ dimensional Dirac-like Hamiltonian for bi-spinor particles into a single trapped ion, one preliminarily obtains the analytical tools for describing ionic state transition probabilities as a typical quantum oscillation feature. For Dirac-like structures driven by generalized Poincar\'e classes of coupling potentials, one also identifies the $\mbox{SU}(2)\otimes \mbox{SU}(2)$ internal degrees of freedom corresponding to intrinsic parity and spin polarization as an adaptive platform for computing the quantum entanglement between the internal quantum subsystems which define two-qubit ionic states. The obtained quantum correlational content is then translated into the quantum entanglement of two-qubit ionic states with quantum numbers related to the total angular momentum and to its projection onto the direction of the trapping magnetic field. Experimentally, the controllable parameters simulated by ion traps can be mapped into a Dirac-like system in the presence of an electrostatic field which, in this case, is associated to ionic carrier interactions. Besides exhibiting a complete analytical profile for ionic quantum transitions and quantum entanglement, our results indicate that carrier interactions actively drive an overall suppression of the quantum entanglement.