Distribution and Evolution of Quantum Coherence for Open Multi‐Qubit Systems in Non‐Inertial Frames

The distribution and evolution of quantum coherence for multi‐qubit W and GHz states of Dirac fields in the non‐inertial frames and under the action of local environments is studied. It is found that the N‐qubit W state has all orders of coherence (from bipartite to N‐partite subsystems), and the co...

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Bibliographic Details
Published in:Annalen der Physik 2021-04, Vol.533 (4), p.n/a
Main Authors: Zeng, Hao‐Sheng, Cao, Hui‐Min
Format: Article
Language:English
Subjects:
Coherence
dirac field
Entangled states
Evolution
non‐inertial frames
quantum coherence
Quantum phenomena
Qubits (quantum computing)
Subsystems
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Summary:The distribution and evolution of quantum coherence for multi‐qubit W and GHz states of Dirac fields in the non‐inertial frames and under the action of local environments is studied. It is found that the N‐qubit W state has all orders of coherence (from bipartite to N‐partite subsystems), and the coherence of the whole system is equal to the sum of all the bipartite coherences in the whole time evolution. However, the evolved N‐qubit GHz state has its coherence belonged only to the whole system and no coherence resides in any subsystems. Further, it is found that the expressions of coherence for both W and GHz states are covariant with respect to the transformation of decaying rates. It is shown that under the joint action of both Unruh effect and local environments, the N‐qubit W state has all orders of coherence (from bipartite to N‐partite subsystems), and the total coherence of any subsystem equals the sum of all the bipartite coherences in the subsystem. However, the N‐qubit GHz state has only genuine global coherence.
ISSN:0003-3804
1521-3889
DOI:10.1002/andp.202000606