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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Tetrapartite entanglement measures of GHZ state with uniform acceleration
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Tetrapartite entanglement measures of GHZ state with uniform acceleration

机译：统一加速度的GHz状态四大星纠缠措施

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摘要

Using the single-mode approximation, we calculate entanglement measures such as negativity (1 - 3, 1 - 1 and 2 - 2 tangles) and von Neumann entropy for a tetrapartite Greenberger- Horne-Zeilinger system in a non-inertial frame. We then analyze the whole entanglement measures, the residual pi(4) and geometric Pi(4) average of tangles. We find that the difference between them is very small or disappears with the increasing accelerated observers. The entanglement properties are compared among the different cases from one accelerated observer and others remaining stationary to all four accelerated observers. The results presented here show that entanglement still exists for the complete system even when acceleration r tends to infinity. The degree of entanglement is always equal to zero for the 1 - 1 tangle case. We also study the negativity 2 - 2 tangle for completeness. We reexamine the existence of the Unruh effect in non-inertial frames. It is also found that the von Neumann entropy increases with the increasing accelerated observers, and S-kappa I zeta I and S-kappa I zeta I(delta I) first increase and then decrease with the acceleration parameter r, e.g. S-kappa zeta(max) = 1.65853 at r = 0.599881 and S-kappa zeta(delta)(max) = 2.28231 at r = 0.676196. This implies that the subsystems rho(kappa I zeta I) and rho(kappa I zeta I)(delta I) are at first more disordered and then the disorder is reduced with the increasing acceleration parameter r.
机译：使用单模近似，我们计算在非惯性框架中的四元绿地植物 - ZEININER系统等纠缠措施，如消极性（1 - 3，1 - 1和2 - 2蝶形）和von Neumann熵。然后，我们分析了整个纠缠措施，残余PI（4）和几何PI（4）平均缠结。我们发现它们之间的差异非常小或随着增加的加速观察员而消失。纠缠属性与一个加速观察者的不同案例比较，其他情况仍然留在所有四个加速观察者。这里提出的结果表明，即使加速R趋于无穷大，也仍然存在整个系统的纠缠。对于1 - 1弯曲案例，缠结程度始终等于零。我们还研究了2 - 2纠结了完整性。我们重新审视在非惯性框架中的近似效应的存在。还发现von neumann熵随着加速观察者的增加而增加，以及S-κ_izetai和s-kappa i zeta i（delta i）首先增加，然后随加速度参数r减小，例如，减少。在r = 0.599881和r = 0.676196的r = 0.599881和s-κzeta（Δ）= 2.28231的S-Kappa Zeta（MAX）= 1.65853。这意味着子系统Rho（Kappa I Zeta I）和Rho（kappai Zeta i）（ΔI）初更为紊乱，然后随着增加的加速度参数R降低了疾病。

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