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Utilizing the geometric phase (GP) acquired in a quantum evolution, we manifest the thermality and quantum nature of the Unruh effect of an accelerating detector. We consider an UDW detector coupling to a conformal field in Minkowski spacetime, whose response spectrum exhibits an intermediate statistics of (1+1) anyon field. We find that comparing to an inertial moving detector, the GP in accelerating frame is modified after the nonunitary evolution of the detector due to the Unruh effect. We show that such modification can distinguish the different thermalizing ways of the detector, which depends on the scaling dimension of the conformal primary field. Finally, we estimate the difference between the GP under the Unruh radiation and that in a thermal bath for a static observer, which reveals the quantum origin of the Unruh effect rather than a conventional thermal noise. 相似文献
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惟有观念"放开"才得见教学"开放"--由苏教版新课标教材《数学1》中的开放题说开去 总被引:1,自引:0,他引:1
江苏省从2005年开始在全省范围内使用新课标教材,新教材无论是在教材课文还是在课后练习、习题部分都体现出新的教育理念.如:构建共同基础,提供发展平台;倡导积极主动、勇于探索的学习方式;注重提高学生的数学思维能力;与时俱进地认识“双基”等等.与以往教材相比,笔者认为较大 相似文献
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A growing interest in biodegradable polymers and their biomedical and pharmaceutical applications has developed since the past decade. Ring-opening polymerization has been regarded as an efficient route for the synthesis of the biodegradable polymers, such as polyester, polycar- bonates and polyphosphates[1—6]. However, chemical methods for the ring-opening polymerization of biodegradable polymers need extremely pure monomers and anhydrous conditions as well as metallic catalysts, which must … 相似文献
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以氨水和硝酸锌为前躯体,采用低温水溶液法在涂敷ZnO晶种层的玻璃衬底上外延生长了ZnO纳米棒晶阵列。应用SEM、TEM、SAED和XRD表征了ZnO纳米晶的形貌和结构。讨论了该组成体系水溶液法纳米棒外延生长的机理及其对棒晶形貌的影响。通过对水溶液pH值的原位二次调整,制备出了ZnO纳米管和表面绒毛状的棒晶阵列,基于生长机理探讨了它们的形成原因,为实现不同形貌ZnO纳米晶阵列的优化控制提供了可能的技术途径。结果表明,不同形貌的ZnO均属沿c轴择优取向的六方纤锌矿结构。 相似文献
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为了实现激光雕刻切割机的灵活控制,提出了一种基于PMAC运动控制器的激光雕刻控制系统方案。PMAC运动控制器通过Pcomm32通信驱动程序接收工控机的指令数据,并将控制量传递给伺服驱动器,控制两个交流伺服电机的运转,同时伺服驱动器接收伺服电机的位置反馈信号,进行位置补偿,从而达到电机位置的精确控制。对运动控制模块进行了设计,并给出运动了程序基本结构。该方案结构简单,可靠性好,控制方式灵活,加工效率得到了大幅度的提高。 相似文献
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