湖南文理学院学报（自然科学版）
湖南文理學院學報（自然科學版）
호남문이학원학보（자연과학판）
JOURNAL OF HUNAN UNIVERSITY OF ARTS AND SCIENCE(SCIENCE AND TECHNOLOGY)
2014年
2期
7-12
,共6页
W纠缠%弱测量%熵测不准关系%振幅阻尼通道
W糾纏%弱測量%熵測不準關繫%振幅阻尼通道
W규전%약측량%적측불준관계%진폭조니통도
W state%weak measurements%entropic uncertainty principle%amplitude-damping channel
利用弱测量与反弱测量技术,研究了基于W纠缠辅助的熵测不准关系在振幅阻尼噪声下的演化行为。分别对单粒子和双粒子经历噪声的情况进行了模拟计算,发现弱测量与反弱测量技术对双粒子经历噪声的纠缠恢复优于单粒子噪声情况。在双粒子噪声情况下,2个不对易的力学量在同一个体系中的测不准量会明显减少,计算发现该测不准量与弱测量和反弱测量强度、阻尼衰减系数等因素有关。阻尼衰减系数在一定的范围内,弱测量与反弱测量技术有效地提高了W纠缠态抵御噪声的能力,本文给出了关于不确定量更紧的束缚。
利用弱測量與反弱測量技術,研究瞭基于W糾纏輔助的熵測不準關繫在振幅阻尼譟聲下的縯化行為。分彆對單粒子和雙粒子經歷譟聲的情況進行瞭模擬計算,髮現弱測量與反弱測量技術對雙粒子經歷譟聲的糾纏恢複優于單粒子譟聲情況。在雙粒子譟聲情況下,2箇不對易的力學量在同一箇體繫中的測不準量會明顯減少,計算髮現該測不準量與弱測量和反弱測量彊度、阻尼衰減繫數等因素有關。阻尼衰減繫數在一定的範圍內,弱測量與反弱測量技術有效地提高瞭W糾纏態牴禦譟聲的能力,本文給齣瞭關于不確定量更緊的束縳。
이용약측량여반약측량기술,연구료기우W규전보조적적측불준관계재진폭조니조성하적연화행위。분별대단입자화쌍입자경력조성적정황진행료모의계산,발현약측량여반약측량기술대쌍입자경력조성적규전회복우우단입자조성정황。재쌍입자조성정황하,2개불대역적역학량재동일개체계중적측불준량회명현감소,계산발현해측불준량여약측량화반약측량강도、조니쇠감계수등인소유관。조니쇠감계수재일정적범위내,약측량여반약측량기술유효지제고료W규전태저어조성적능력,본문급출료관우불학정량경긴적속박。
By the weak quantum measurement and quantum measurement reversal, the entropic uncertainty principle with W state-assisted via amplitude-damping channel noise was studied and the situations of single-particle and two-particle via the noises respectively were calculated. The results show that the capability of entanglement recovery of two-particle through the noises was superior to that of single-particle by using of the technology of weak quantum measurement and it ws reversal. Furthermore, the uncertainties about the outcomes of two incompatible measurements on a particle would reduce obviously with the strengths of weak measurement and quantum measurement reversal, the damping rate etc.. For a certain values of the damping rate, a lower bound on the uncertainties was put forward, which depends on the amount of entanglement between the particle and the quantum memory.
