压缩真空态下介观电路的量子涨落

从有源LC回路的运动方程出发，研究了在压缩真空态下介观LC电路中电荷、电流的量子涨落． 关键词：     

介观RLC并联电路量子效应

研究了介观RLC并联电路系统量子态随时间的演化，结果表明，在外加电源作用下，有耗散的RLC并联电路，系统将由初始的真空态演化到压缩态。     

耗散介观电容耦合电路的量子效应

对介观耗散电容耦合电路作阻尼谐振子处理,将其量子化,在此基础上研究电荷和电流在能量本征态下的量子涨落,并对其进行讨论.结果表明,每个回路的电荷、电流都存在量子涨落,且两回路的量子噪声是相互关联的. 关键词： 介观耗散电路 电容耦合 量子涨落     

热克尔态下介观LC电路的量子涨落

基于介观电容可看作介观隧道结的物理事实，利用旋波近似方法，对介观LC电路进行量子化处理，量子化后介观LC电路系统等效为一个克尔系统.再利用热场动力学理论方法 研究了介观LC电路在有限温度时热克尔态下电荷和磁通的量子涨落，并对结果进行了讨 论. 关键词： 介观LC电路 热克尔态 量子涨落     

非耗散介观含源电路的量子力学效应

本文对非耗散介观含源电路的量子力学效应进行了详细研究.导出了非耗散介观含源电路在压缩真空态下其电荷和电流的量子零点涨落,并得到了该电路在绝对零度时的量子噪音.     

介观二阶并联电路的量子涨落

从有源RLC并联电路的经典运动方程出发,通过引入复正则变量,提出了RLC并联电路的量子化方案.作为应用,研究了压缩真空态下介观并联RLC电路中电压,电流的量子涨落,并对结果进行了讨论.     

有源介观LC电路的量子涨落

本文利用含时微扰论,研究了电源幅值较小时介观LC电路中电荷与电流的量子涨落。在确定的温度下,系统将处在混合态,进一步得到有限温度下含源介观LC电路的量子涨落。研究表明有源介观LC电路的量子涨落不仅与电路参数有关,还与时间和温度有关。     

有源介观LC电路中电源对量子涨落的影响

从有源ＬＣ电路运动方程出发，通过量子化有源ＬＣ电路和计算电压、电流的量子涨落，研究了电源对量子涨落的影响。     

介观LC电路中电压、电流的量子涨落

从有源LC回路运动方程出发,通过引入正则变量、量子化有源LC电路,研究了真空态、压缩真空态下介观LC电路中电压、电流的量子涨落,并着重研究了压缩角对涨落的影响。     

压缩真空态下介观RLC电路中电荷和电流的量子涨落

发展了一种有源RLC电路的量子力学处理方案,在此基础上研究了压缩真空态下介观RLC电路中电荷和电流的量子涨落,着重研究了电阻和压缩参数对量子涨落的影响. 关键词：     

Squeezing Effects of a Mesoscopic Dissipative Coupled Circuit

We study the quantum effect of a mesoscopic dissipative-coupled RLC circuit of the capacitances. We find that if the quantum dissipative system is in the vacuum state at the initial time, it will evolve to a squeezed coherent state under the effect of an external pulse source because of the presence of the coupling and damping.     

Quantum Effects of a Dissipative Mesoscopic Circuit with Mutual Inductance

We study the quantum fluctuations of the charge and current of two L-C dissipative mcsoscopic circuit withthe mutual inductance in the vacuum state. Our results show that the system state will evolve to a squerzcd coherentstate under the effect of external source. We find that the squeezing amplitude parameter is relative to the parametersof circuit and the mutual-inductance coefficient in the existence of dissipation. Whcn the circuit has no dissipation orthere is complete coupling between two meshes, the squeezing amplitude parameter only depends on the capacitance'sratio.     

Quantum Effects of a Dissipative Mesoscopic Circuit with Mutual Inductance

We study the quantum fluctuations of the charge and current of two L-C dissipative mesoscopic circuit with the mutual inductance in the vacuum state.Our results show that the system state will evolve to a squeezed coherent state under the effect of external source.We find that the squeezing amplitude parameter is relative to the parameters of circuit and the mutual-inductance coefficient in the existence of dissipation.When the circuit has no dissipation or there is complete coupling between two meshes,the squeezing amplitude parameter only depends on the capacitance‘s ratio.     

Quantum Fluctuation in Thermal Vacuum State for a Mesoscopic RLC Circuit

By means of the thermal field dynamics theory invented by Takahashi and Umezawa, we study the quantum effects of a nondissipative mesoscopic RLC circuit at a finite temperature.     

Quantum Mechanical Effects in a Non-Dissipation Mesoscopic Coupled Circuit in the Presence of Source

Under the squeezed vacuum state, the quantum zero point fluctuations for both the charge and current of a non-dissipation mesoscopic coupled circuit in the presence of source are given. The quantum mechanical effects of this circuit at zero temperature are studied.     

介观互感耦合阻尼并联双谐振电路的量子涨落

对介观互感耦合阻尼并联电路作双模耦合阻尼谐振子处理,将其量子化.通过三次幺正变换,将体系的哈密顿量对角化.在此基础上给出了体系的本征能谱,研究了Fock态、真空态下各回路电流和电压的量子涨落.     

The Squeezing Effect in a Mesoscopic RLC Circuit

Using the path integral method we derive quantum wave function and quantum fluctuations of charge andcurrent in the mesoscopic RLC circuit. We find that the quantum fluctuation of charge decreases with time, oppositely,the quantum fluctuation of current increases with time monotonously. Therefore there is a squeezing effect in the circuit.If some more charge devices are used in the mesoscopic-damped circuit, the quantum noise can be reduced. We also findthat uncertainty relation of charge and current periodically varies with the period π/2 in the under-damped case.     

QUANTUM FLUCTUATIONS IN A MESOSCOPIC DAMPED LC PARALLEL CIRCUIT IN DISPLACED SQUEEZED FOCK STATE

We study the quantum effects of a damped LC parallel circuit considering its different performance from an RLC series circuit in classical physics. The damped LC parallel circuit with a source is quantized and the quantum fluctuations of magnetic flux and electric charge in the circuit in displaced squeezed Fock state are investigated. It is shown that, as in the RLC series circuit, the fluctuations only depend on the squeezing parameter and the parameters of the circuit components in the damped LC parallel circuit, but the effects of the circuit components on the fluctuations are different in the two circuits.