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Quantum Electrodynamics And Photon-assisted Tunneling In Long Josephson Junctions

机译:长约瑟夫森结的量子电动力学和光子辅助隧穿

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摘要

We describe the interaction between an electromagnetic field and a long Josephson junction driven by a dc current. We calculate the amplitudes of emission and absorption of light via the creation and annihilation of quantized Josephson plasma waves (JPWs). Both the energies of JPW quanta and the amplitudes of light absorption and emission strongly depend on the junction's length and can be tuned by an applied dc current. Moreover, photon-assisted macroscopic quantum tunneling in long Josephson junctions shows resonances when the frequency of the outside radiation coincides with the current-driven eigenfrequencies of the quantized JPWs.
机译:我们描述了电磁场和由直流电流驱动的长约瑟夫森结之间的相互作用。我们通过创建和消灭量化的约瑟夫森等离子体波(JPWs)计算光的发射和吸收幅度。 JPW量子的能量以及光吸收和发射的幅度都很大程度上取决于结的长度,并且可以通过施加的dc电流进行调整。此外,当外部辐射的频率与量化的JPW的电流驱动本征频率一致时,长约瑟夫森结中的光子辅助宏观量子隧穿会显示出共振。

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