Exploiting randomness in quantum information processing

Exploiting Randomness in Quantum Information Processing

We consider how randomness can be made to play a useful role in quantum information processing in particular, for decoherence control and the implementation of quantum algorithms. For a twolevel system in which the decoherence channel is non-dissipative, we show that decoherence suppression is possible if memory is present in the channel. Random switching between two potentially harmful noise s...

Exploring and Exploiting Quantum-Dot Cellular Automata

The Full Adders (FAs) constitute the essential elements of digital systems, in a sense that they affect the circuit parameters of such systems. With respect to the MOSFET restrictions, its replacement by new devices and technologies is inevitable. QCA is one of the accomplishments in nanotechnology nominated as the candidate for MOSFET replacement. In this article 4 new layouts are presente...

Quantum Games Seminar in Quantum Information Processing

Quantum parallelism in quantum information processing

We investigate distinguishability (measured by the fidelity) of the initial and the final state of a qubit, which is an object of the so-called nonideal quantum measurement of the first kind. We show that the fidelity of a nonideal measurement can be greater than the fidelity of the corresponding ideal measurement. This result is somewhat counterintuitive, and can be traced back to the quantum ...

Quantum Information Processing in Nanostructures