We investigated the magnetic-field dependence of the Josephson current and Fiske resonances in specially shaped Josephson junctions. In order to be able to use junctions for high-resolution X-ray spectroscopy, a very good suppression of the sidelobes of both the Josephson current and the Fiske resonances must be achieved. In a theoretical argument we show that a properly chosen junction shape l...

The spontaneous flux generation and magnetic field modulation of the critical current in a 0−π Josephson junction are calculated for different ratios of the junction length L to the Josephsen penetration depth λJ , and different ratios of the 0-junction length to the π-junction length. These calculations apply to a Pb-YBCO c-axis oriented junction with one YBCO twin boundary, as well as other e...

The Josephson effect is generally described as Cooper-pair tunneling but it can also be understood in a more general context. The dc Josephson effect is the pseudo-Goldstone boson of two coupled systems with a broken continuous Abelian U 1 symmetry. Hence, an analog should exist for systems with broken continuous nonAbelian symmetries. To exhibit the generality of the phenomenon and make predic...

Using a classical equation of motion, dynamics of the phase is analyzed in the Inductive Single-Electron Transistor (L-SET) which is a promising new system suitable for quantum measurement with ultimate sensitivity and low back-action. In a regime of nonlinear dynamics, a shift of the oscillator resonant frequency is discovered which has a direct analogy to the switching of a dc-biased Josephso...

Reversibility is a concept widely studied in physics as well as in computer science. Reversible computation is characterized by means of invertible properties [1]. Quantum systems evolution is described by the time evolution operator U , which is unitary and invertible; therefore such systems can implement reversibility. Reversible/invertible Cellular Automata (CA) [1] are one of the most relev...

We present a combined scanning force and tunneling microscope working in a dilution refrigerator that is optimized for the study of individual electronic nano-devices. This apparatus is equipped with commercial piezo-electric positioners enabling the displacement of a sample below the probe over several hundred microns at very low temperature, without excessive heating. Atomic force microscopy ...

Reversibility is a concept widely studied in physics and computer science. Quantum systems evolution is described by the time evolution operator U , which is unitary and then invertible. Likewise, reversible computation is characterized by means of invertible properties. Reversible/invertible cellular automata (CA) are one of the most relevant reversible computational models. Here we introduce ...

A superconducting quantum interference device (SQUID) comprising 0- and $\pi$-Josephson junctions (JJs), called $\pi$-SQUID, is studied by the resistively shunted junction model. The $\pi$-SQUID shows half-integer Shapiro-steps (SS) under microwave irradiation at voltage $V$ = $(\hbar/2e)\Omega (n/2)$, with angular frequency $\Omega$ $n$/2 in addition to integer $n$. We show that can be a $\pi$...

We investigate theoretically the Josephson current through one semiconductor quantum dot (QD) coupled to triple nanowires (junctions) with Majorana bound states (MBSs) prepared at their ends. find that not only strength but also period of flowing between left and right junctions via can be fully controlled in terms third junction side-coupled QD. When phase factor is zero junction, which acts a...

The combination of symmetry breaking effects, such as those occurring in magnets and superconductors, with topological order may result in remarkable new physics. Recent theoretical studies suggest that, in certain superconductors, exotic quasiparticle excitations can emerge that behave like Majorana fermions, chargeneutral quasiparticles that are their own antiparticles. In Physical Review Let...