https://doi.org/10.1140/epjc/s10052-025-14588-x
Regular Article - Theoretical Physics
Basis-independent coherence in noninertial frames
1
College of Electronic and Optical Engineering and College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, 210023, Nanjing, China
2
School of Science, Nanjing University of Posts and Telecommunications, 210023, Nanjing, China
3
Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, 210003, Nanjing, China
a
mingmingdu@njupt.edu.cn
b
zhoul@njupt.edu.cn
Received:
7
June
2025
Accepted:
28
July
2025
Published online:
14
August
2025
We investigate the behavior of basis-independent quantum coherence between two modes of a free Dirac field as observed by relatively accelerated observers. Our findings reveal three key results: (i) the basis-independent coherence between modes 
and 
decreases with increasing acceleration but remains finite even in the limit of infinite acceleration; (ii) at zero acceleration, the coherence between modes and 
is nonzero-contrasting with the behavior of basis-dependent coherence, which typically vanishes in this case; and (iii) the basis-independent coherence between modes 
and remains constant regardless of acceleration, exhibiting a freezing phenomenon. These results demonstrate the intrinsic robustness of basis-independent coherence under Unruh effects.
© The Author(s) 2025
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