RF Quantum Nanoelectronics

David K. Ferry

David K. Ferry

Peter Russer, Johannes A. Russer

Superconducting RF nanoelectronic devices exhibit a considerable potential for application in future electronics. Josephson effect based devices allow generation, detection, mixing, and parametric amplification of high-frequency signals up into the terahertz region and exhibit high sensitivity, low energy consumption, and small size. Traveling-wave devices can be realized with distributed Josephson junctions. Nonlinear lumped-element circuits can be realized that are small enough so that the circuit dynamics are governed by quantum mechanics. This allows to generate two-photon coherent states and entangled states and will open the door for quantum information processing. Nanotechnological fabrication techniques and the availability of novel materials give a strong impact on the development of novel Josephson-effect-based devices and systems. An overview over the physical principles and the possible applications of nanoelectronic RF Josephson devices is presented.

Johannes A. Russer, P. Russer

In RF nanoelectronics and mesoscopic electronics quantum effects play a role on the circuit and system level. In this work a quantum electrodynamics based circuit theory is introduced that allows to establish quantum mechanical models of distributed circuits. Based on the Hamiltonian description of the Foster equivalent circuits a quantization of the equivalent circuits is performed. The quantum mechanical interaction of the modes via nonlinear elements is discussed. A DC-pumped Josephson parametric amplifier is treated quantum mechanically.

Hafiz Md. Hasan Babu

Xavier Waintal, Benoit Gaury, Joseph Weston