Modular quantum computing and quantum-like devices

Unconventional Quantum Computing Devices

This paper investigates a variety of unconventional quantum computation devices , including fermionic quantum computers and computers that exploit nonlinear quantum mechanics. It is shown that unconventional quantum computing devices can in principle compute some quantities more rapidly than 'conventional' quantum computers. Computers are physical: what they can and cannot do is determined by t...

Quantum Computing without Magic: Devices

Optically Driven Quantum Computing Devices Based on Semiconductor Quantum Dots

This paper concerns optically driven quantum logic devices based on semiconductor quantum dots. It provides a brief review of recent theoretical and experimental progress towards building such devices and a description of a possible direction of further research. We consider both the exciton and the electron spin as a potential qubit. Quantum dot fabrication and single dot spectroscopy studies ...

Quantum Computing with Very Noisy Devices

There are quantum algorithms that can efficiently simulate quantum physics, factor large numbers and estimate integrals. As a result, quantum computers can solve otherwise intractable computational problems. One of the main problems of experimental quantum computing is to preserve fragile quantum states in the presence of errors. It is known that if the needed elementary operations (gates) can ...

Cartoon Computation: Quantum-like computing without quantum mechanics

Diederik Aerts 1 and Marek Czachor 1,2 1 Centrum Leo Apostel (CLEA) and Foundations of the Exact Sciences (FUND) Vrije Universiteit Brussel, 1050 Brussels, Belgium 2 Katedra Fizyki Teoretycznej i Informatyki Kwantowej Politechnika Gdańska, 80-952 Gdańsk, Poland Abstract We present a computational framework based on geometric structures. No quantum mechanics is involved, and yet the algorithms p...