A. V. Tsukanov

NV-centers in diamond. Part I. General information, fabrication technology, and the structure of the spectrum

A quantum system, which is one of the most popular and promising in experimental quantum informatics, namely, the NV-center in diamond, is considered. We draw the reader’s attention to the results obtained for the past several years, which envelope a wide circle of questions associated with the fabrication, control, and measurement of NV-centers; and with their use as elementary carriers of quantum information. The problem of the construction of a full-scale quantum computer is discussed.

NV centers in diamond. Part III: Quantum algorithms, scaling, and hybrid systems

In this part of the review, the currently implemented elementary quantum algorithms are considered and prospects of the development of the full-scale quantum computer based on NV centers in diamond are discussed. The NV-hybrid systems, which can operate as the communication elements between remote NV qubits, are analyzed.

NV-centers in diamond. Part II. Spectroscopy, spin-state identification, and quantum manipulation

The spectral and coherent properties of nitrogen-vacancy (NV) centers in diamond are described, together with the techniques used for their experimental investigation. Particular attention is given to recently developed methods of initialization and spin-state identification for a single NV center or a spin system based on an NV center. Both electronic and nuclear spin are considered. Active and passive methods of lengthening the relaxation and phase-coherence times are discussed.

Quantum Dots in Photonic Molecules and Quantum Informatics Part II.

The main types, fabrication technologies, and physical characteristics of photonic molecules are reviewed. The spectra and spatial configurations of molecular eigenmodes are analyzed within the tight-binding model. Experimental methods for studying the properties of photonic molecules and controlling their states with the use of various external devices are described in detail.

Quantum calculations on quantum dots in semiconductor microcavities. Part II

Solid hybrid systems formed by interacting semiconductor quantum dots and high-Q optical cavities based on various defects in photonic crystals are considered. General information on the types of solid optical structures and fundamentals of their spectra and dynamics description are presented.

Superconducting resonators and charge qubits: Spectroscopy and quantum operations. Part I

For the past few years, considerable progress has been made in the fabrication of quantum devices using mesoscopic semiconductor elements. These devices can represent the elemental base for a wide class of high-tech devices from supersensitive detectors of an electromagnetic field to reliable sources of single photons and quantum computers. The article reviews the main experimental results obtained to date with the participation of superconducting quantum devices.

Simulation of the spectroscopic response and electron dynamics in a double quantum dot

We present the results of the numerical simulation of the dependence of the absorption spectrum of a single-electron semiconductor double quantum dot placed in a microcavity on structural parameters and the time dependence of populations of quantum dot states. The investigated physical system can be used for quantum information coding and processing. Initialization and one-qubit operations correspond to the redistribution of populations of localized states of a quantum dot under the action of laser and cavity optical fields.

Superconducting cavities and charge qubits: Spectroscopy and quantum operations. Part II

In the second part of our review, we focus on such urgent problems of modern physics as the use of superconductors in quantum informatics and coherent control of the state of mesoscopic systems.

Simulation of the spectroscopic response of photonic isomers with NV centers. Part I

The problems of studying the spectral characteristics of extended photonic molecules called photonic isomers with the use of different quantum-mechanical approaches are considered. In Part I, the theory of the interaction between photonic molecules containing NV centers with a probe laser pulse is described. The electron-photon spectrum is classified in accordance with the system parameters by the example of a diatomic photonic molecule.

Quantum memory based on ensemble states of NV centers in diamond

In this study, the main results of experimental and theoretical investigations that substantiate the possibility of the development of quantum computational systems with a separate structure are considered and analyzed. These systems involve the operational part and the memory, as well as the communication quantum network, which performs the data exchange between them. We are starting to get knowledge about such hybrid quantum devices from studying the solid-state systems, in which the macroscopic number (ensemble) of NV centers in diamond is used as the memory element, while superconducting mesoscopic structures play the role of the operational element and quantum network.