TY - JOUR
TI - Quantum correlations and fisher information in multipartite two-level system under Kerr medium effect
AU - Almalki Shaimaa
AU - Ibrahim Muhammad
AU - Anwar Jamal S
AU - Ilyas Muhammad
AU - Khalek Sayed Abdel
AU - Albogami Tahani M
AU - Khan Khalid M
JN - Thermal Science
PY - 2025
VL - 29
IS - 1
SP - 347
EP - 358
PT - Article
AB - This paper investigates the evolution of global quantum discord (GQD) and  quantum Fisher information (QFI) of the interaction of multiple two-level  atomic systems (TLS) with a single thermal field mode and a non-linear Kerr  medium (NLKM) considering the cases of intrinsic decoherence and its  absence. Results indicate that increasing the number of atomic systems (N)  while maintaining the NLKM parameter constant χ leads to higher GQD and QFI  values for both intrinsic intrinsic decoherence cases. With rising χ, the  GQD values decrease but the oscillation rate of the GQD increases. The  presence of intrinsic decoherence does not significantly reduce the GQD  quasi-static value compared to the no-decoherence scenario for certain χ  values. At the same time, a different trend is observed for higher χ values.  The average QFI value rises with reduced oscillation amplitudes for higher  χ values and larger N subsystems. Unlike the GQD, higher χ values aid in  maintaining average QFI in the presence of intrinsic decoherence. For moving  TLS, changing χ does not alter the oscillation periods of the GQD and QFI.  The GQD values decrease with increased χ in the moving system case, while  the QFI improves with higher χ values. Additionally, higher average thermal  photons within the system suppress the GQD and QFI values and decrease  oscillation amplitudes for both quantifiers.