# Does relativistic motion always degrade quantum Fisher information?

@article{Liu2021DoesRM, title={Does relativistic motion always degrade quantum Fisher information?}, author={Xiaobao Liu and Jiliang Jing and Zehua Tian and Weiping Yao}, journal={Physical Review D}, year={2021} }

We investigate the ultimate estimation precision, characterized by the quantum Fisher information, of a two-level atom as a detector which is coupled to massless scalar field in the Minkowski vacuum. It has been shown that for an inertial detector moving with a constant velocity, its quantum Fisher information is completely unaffected by the velocity, however, it still decays over time due to the decoherence caused by the interaction between the atom and the field. In addition, for a uniformly…

## 2 Citations

Quantum coherence of a circularly accelerated atom in a spacetime with a reflecting boundary

- PhysicsScientific reports
- 2022

We investigate, in the paradigm of open quantum systems, the dynamics of quantum coherence of a circularly accelerated atom coupled to a bath of vacuum fluctuating massless scalar field in a…

Probing cosmic string spacetime through parameter estimation

- PhysicsThe European Physical Journal C
- 2022

Quantum metrology studies the ultimate precision limit of physical quantities by using quantum strategy. In this paper we apply the quantum metrology technologies to the relativistic framework for…

## References

SHOWING 1-10 OF 117 REFERENCES

Quantum estimation of acceleration and temperature in open quantum system

- Physics
- 2020

In an open quantum system, we study the evolution of a two-level atom as a detector which interacts with given environments. For a uniformly accelerated two-level atom coupled to a massless scalar…

Fisher information as a probe of spacetime structure: Relativistic quantum metrology in (A)dS.

- Physics
- 2020

Relativistic quantum metrology studies the maximal achievable precision for estimating a physical quantity when both quantum and relativistic effects are taken into account. We study the relativistic…

Relativistic Quantum Metrology in Open System Dynamics

- PhysicsScientific reports
- 2015

This work investigates the evolution of a two-level atom as a detector which interacts with a massless scalar field using the master equation approach for open quantum system and finds the optimal precision of estimation is achieved when the detector evolves for a long enough time.

Quantum Fisher information in noninertial frames

- Physics
- 2014

We investigate the performance of quantum fisher information under the Unruh-Hawking effect, where one of the observers (eg, Rob) is uniformly accelerated with respect to other partners. In the…

Parameter estimation in cosmic string spacetime by using the inertial and accelerated detectors

- PhysicsClassical and Quantum Gravity
- 2020

Since cosmic string spacetime is locally flat but with nontrivial global topology characterized by a deficit angle, we devote to address the quantum bound to the estimation of the deficit angle…

Dynamical behavior and geometric phase for a circularly accelerated two-level atom

- Physics
- 2014

We study, in the framework of open quantum systems, the time evolution of a circularly accelerated two-level atom coupled in the multipolar scheme to a bath of fluctuating vacuum electromagnetic…

Fisher information in a quantum-critical environment

- Physics
- 2010

We consider a process of parameter estimation in a spin-j system surrounded by a quantum-critical spin chain. Quantum Fisher information lies at the heart of the estimation task. We employ Ising spin…

Fisher information and multiparticle entanglement

- Physics, Computer Science
- 2012

Bounds on F imply that genuine multiparticle entanglement is needed for reaching the highest sensitivities in quantum interferometry, and these criteria detect different sets of states and illustrate their strengths by considering several examples.

Electromagnetic shielding in quantum metrology

- Physics
- 2015

The dynamics of the quantum Fisher information of the parameters of the initial atomic state and atomic transition frequency is studied, in the framework of open quantum systems, for a static…