Quantum Pseudo-Telepathy in Spin Systems: Magic Square Game Under Magnetic Fields and Dzyaloshinskii-Moriya Interaction

TL;DR

This paper investigates how Dzyaloshinskii-Moriya interaction affects the success probability of a quantum magic square game played with spin systems, revealing that it reduces winning chances despite increasing entanglement.

Contribution

First analysis of DM interaction's impact on quantum game success probabilities, showing it can decrease winning chances even as it excites entanglement in spin systems.

Findings

DM interaction excites entanglement but reduces game winning probability

Effects of DM interaction and magnetic field are equivalent on success probability

XXZ model is more robust than XX model against destructive effects

Abstract

Dzyaloshinskii-Moriya (DM) interaction has been proven to excite entanglement of spin systems, enhancing the capability of realizing various quantum tasks such as teleportation. In this work, we consider the DM interaction -to the best of our knowledge, for the first time in quantum game theory. We study the winning probability of magic square game played with the thermal entangled state of spin models under external magnetic fields and DM interaction. We analytically show that although DM interaction excites the entanglement of the system as expected, it surprizingly reduces the winning probability of the game, acting like temperature or magnetic fields, and also show that the effects of DM interaction and inhomogeneous magnetic field on the winning probability are identical. In addition, we show that XXZ model is considerably more robust than XX model against destructive effects. Our results can open new insights for quantum information processing with spin systems.