Physics

Revealing inherent quantum interference and entanglement of a Dirac particle

W. Ning, R. Zheng, et al.

This groundbreaking research by Wen Ning and colleagues uncovers the quantum interference behavior of Dirac particles beyond so-called Zitterbewegung. Their findings reveal intriguing interference patterns characterized by Wigner function negativity and pseudospin-momentum entanglement, confirmed by experiments with superconducting qubits. Explore the fundamental quantum nature of Dirac particle dynamics and their implications for quantum technology.

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Abstract

This paper investigates the quantum interference behavior of Dirac particles, going beyond the previously studied Zitterbewegung (ZB). The authors reveal an interference pattern in phase space, characterized by the negativity of the Wigner function and pseudospin-momentum entanglement. These nonclassical effects are confirmed through numerical simulation and an on-chip experiment using a superconducting qubit and a quantized microwave field. The results demonstrate the fundamental quantum nature of Dirac particle dynamics and their potential applications in quantum technology.

Publisher

npj Quantum Information

Published On

Oct 10, 2023

Authors

Wen Ning, Ri-Hua Zheng, Yan Xia, Kai Xu, Hekang Li, Dongning Zheng, Heng Fan, Fan Wu, Zhen-Biao Yang, Shi-Biao Zheng

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