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PreprintCC BY 4.0arXiv

Quantum discord of Gaussian states in non-inertial frames

  • Siwei Li
  • Xiaofen Huang
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Abstract

We investigate the redistribution of continuous-variable Gaussian quantum discord under the Unruh effect for both one and two uniformly accelerated observers. The discord shared between the inertial mode and the accessible accelerated mode, as well as that between the two accessible accelerated modes, decays monotonically with acceleration and vanishes in the limit a→∞, while the Unruh effect generates discord in all causally disconnected Rindler mode pairs. The initial quantum correlation is therefore redistributed across Rindler partitions rather than destroyed. We further characterize how the squeezing parameter s and field frequency ω control the discord in different mode-pair classes. For causally connected pairs, s and ω exert comparable, interchangeable effects; for cross-region pairs, the squeezing parameter dominates; and for intra-observer cross-region pairs, the field frequency is more influential. In the two-observer case, the AII-BII pair exhibits non-monotonic behavior with a peak whose position shifts to larger a as ω increases, and both parameters contribute only weakly except near an optimal ω/s ratio.

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Cite

BibTeXRIS
BibTeX
@misc{li2026quantum,
  title = {{Quantum discord of Gaussian states in non-inertial frames}},
  author = {Siwei Li and Xiaofen Huang},
  howpublished = {arXiv},
  year = {2026},
  month = aug,
  doi = {10.48550/arxiv.2608.29079},
  eprint = {2608.29079},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2608.29079},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Quantum discord of Gaussian states in non-inertial frames
AU  - Siwei Li
AU  - Xiaofen Huang
PY  - 2026
DA  - 2026/08/29
PB  - arXiv
DO  - 10.48550/arxiv.2608.29079
UR  - https://arxiv.org/abs/2608.29079
AB  - We investigate the redistribution of continuous-variable Gaussian quantum discord under the Unruh effect for both one and two uniformly accelerated observers. The discord shared between the inertial mode and the accessible accelerated mode, as well as that between the two accessible accelerated modes, decays monotonically with acceleration and vanishes in the limit a→∞, while the Unruh effect generates discord in all causally disconnected Rindler mode pairs. The initial quantum correlation is therefore redistributed across Rindler partitions rather than destroyed. We further characterize how the squeezing parameter s and field frequency ω control the discord in different mode-pair classes. For causally connected pairs, s and ω exert comparable, interchangeable effects; for cross-region pairs, the squeezing parameter dominates; and for intra-observer cross-region pairs, the field frequency is more influential. In the two-observer case, the A_II-B_II pair exhibits non-monotonic behavior with a peak whose position shifts to larger a as ω increases, and both parameters contribute only weakly except near an optimal ω/s ratio.
ER  -