Quantum coherence behaviors of fermionic system in non-inertial frame

Abstract

In this paper, we analyse the quantum coherence behaviors of a single qubit in the relativistic regime beyond the single-mode approximation. Firstly, we investigate the freezing condition of quantum coherence in fermionic system. We also study the quantum coherence tradeoff between particle and antiparticle sector. It is found that there exists quantum coherence transfer between particle and antiparticle sector, but the coherence lost in particle sector is not entirely compensated by the coherence generation of antiparticle sector. Besides, we emphatically discuss the cohering power and decohering power of Unruh channel with respect to the computational basis. It is shown that cohering power is vanishing and decohering power is dependent of the choice of Unruh mode and acceleration. Finally, We compare the behaviors of quantum coherence with geometric quantum discord and entanglement in relativistic setup. Our results show that this quantifiers in two region converge at infinite acceleration limit, which implies that this measures become independent of Unruh modes beyond the single-mode approximations. It is also demonstrated that the robustness of quantum coherence and geometric quantum discord are better than entanglement under the influence of acceleration, since entanglement undergoes sudden death. * Electronic address: 465609785@qq.com

Multipartite Quantum Coherence and Distribution under the Unruh Effect

“…Due to the difficulty in observing Unruh effect, researchers employ the semiclassical Unruh–Dewitt detector model, which interacts locally with the neighboring external field. Afterward, much interests have been triggered by the behaviors of quantum entanglement, quantum discord, quantum coherence, and quantum nonlocality of the entangled detectors under the influence of Unruh thermal noise. However, we notice that the above investigations are mainly confined to a two‐detector system, and the character of multipartite even N ‐qubit system is still under study.…”

Entropic Uncertainty in Neutrino and Meson Systems

“…For the open meson system, entropic uncertainty also exists for certain anticorrelated with quantum correlation, and they decay with evolution time, which reflects on the decay essence of meson system. Besides, for the two subatomic systems, the entropic uncertainty L is always equal to the lower bound R, which is different from the results of optical, electronic, or atomic systems; [19][20][21][22] this indicates the entropic uncertainty in subatomic system consistently reach the lower bound and could reflect on the stability of subatomic system compared with the other systems. Our exploration would be beneficial for understanding quantum characteristics of subatomic systems and quantum information-processing tasks performed with subatomic systems.…”

“…The entropic uncertainty relation is usually studied in optical, electronic, or atomic system. Huang et al [19,20] investigated the entropic uncertainty relation for atoms coupling with scalar field or electromagnetic field. Some authors explored the quantum-memory-assisted entropic uncertainty in spin chain systems.…”

Feedback Control on Einstein-Podolsky-Rosen Steering of Dissipative System

“…Now, we consider to solve the master (6). Assuming that initial state of two atoms is X-type states which are an important class of quantum states discussed by many papers [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39], according to Pauli matrices, arbitrary two-qubit states can be written as…”