scholarly journals Quantum Toys for Quantum Computing: Persistent Currents Controlled by the Spin Josephson Effect

2003 ◽  
Vol 91 (7) ◽  
Author(s):  
Gen Tatara ◽  
N. Garcia
Keyword(s):  
Quantum Computing ◽  
Josephson Effect ◽  
Persistent Currents

NANOSCALE SUPERCONDUCTIVITY

2012 ◽  
Vol 26 (26) ◽  
pp. 1230013 ◽  
Author(s):  
S. P. KRUCHININ ◽  
H. NAGAO
Keyword(s):  
Exact Solution ◽  
Quantum Computing ◽  
Kondo Effect ◽  
Josephson Effect ◽  
High Quality ◽  
Nano Scale ◽  
Research Areas ◽  
Ferromagnetic Particles

We deal with the problem of nanoscale superconductivity. Nanoscale superconductivity remains to be one of the most interesting research areas in condensed mater. Recent technology and experiments have fabricated high-quality superconducting MgB 2 nanoparticles. We consider the two-band superconductivity in ultrasmall grains, by extending the Richardson exact solution to two-band systems, and develop the theory of interactions between nano-scale ferromagnetic particles and superconductors. The properties of nano-sized two-gap superconductors and the Kondo effect in superconducting ultrasmall grains are investigated as well. The theory of the Josephson effect is presented, and his application to quantum computing are analyzed.

scholarly journals A Novel Treatment of the Josephson Effect

2021 ◽  
Author(s):  
Jacob Szeftel ◽  
Nicolas Sandeau ◽  
Michel Abou Ganthous
Keyword(s):  
Radio Frequency ◽  
Josephson Junction ◽  
Thermal Equilibrium ◽  
Josephson Effect ◽  
Negative Resistance ◽  
Persistent Currents ◽  
Novel Treatment ◽  
Rf Signal ◽  
Bound Electrons

A new picture of the Josephson effect is devised. The radio-frequency (RF) signal, observed in a Josephson junction, is shown to stem from bound electrons, tunneling periodically through the insulating film. This holds also for the microwave mediated tunneling. The Josephson effect is found to be conditioned by the same prerequisite worked out previously for persistent currents, thermal equilibrium and occurence of superconductivity. The observed negative resistance behaviour is shown to originate from the interplay between the normal and superconducting currents.

Discrete variable gate-model quantum computing

2019 ◽  
Author(s):  
Mark Fingerhuth ◽  
Tomáš Babej ◽  
Peter Wittek
Keyword(s):  
Quantum Computing ◽  
Discrete Variable

The Essence of Quantum Computing

2018 ◽  
Author(s):  
Rajendra K. Bera
Keyword(s):  
Hilbert Space ◽  
Quantum Computing ◽  
Quantum Physics ◽  
Quantum Algorithms ◽  
Quantum Computers ◽  
Turing Machines ◽  
Classical Physics ◽  
Core Set ◽  
The World ◽  
Subordinate Role

It now appears that quantum computers are poised to enter the world of computing and establish its dominance, especially, in the cloud. Turing machines (classical computers) tied to the laws of classical physics will not vanish from our lives but begin to play a subordinate role to quantum computers tied to the enigmatic laws of quantum physics that deal with such non-intuitive phenomena as superposition, entanglement, collapse of the wave function, and teleportation, all occurring in Hilbert space. The aim of this 3-part paper is to introduce the readers to a core set of quantum algorithms based on the postulates of quantum mechanics, and reveal the amazing power of quantum computing.

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