Nonholonomic quantum devices

Nonholonomic quantum control

In this paper, we review an open-loop evolution control method, called the nonholonomic control, based on the alternate application of only two physical perturbations for timings which play the role of adjustable control parameters. We present the algorithm which allows one to explicitly compute the pulse sequence achieving any arbitrarily prescribed unitary evolution in a nonholonomic system, ...

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-Effect Devices

Quantum optics with single quantum dot devices

A single radiative transition in a single-quantum emitter results in the emission of a single photon. Single quantum dots are single-quantum emitters with all the requirements to generate single photons at visible and near-infrared wavelengths. It is also possible to generate more than single photons with single quantum dots. In this paper we show that single quantum dots can be used to generat...

Hybrid quantum devices and quantum engineering

We discuss prospects of building hybrid quantum devices involving elements of atomic and molecular physics, quantum optics and solid-state elements with the attempt to combine advantages of the respective systems in compatible experimental setups. In particular, we summarize our recent work on quantum hybrid devices and briefly discuss recent ideas for quantum networks. These include interfacin...