Lectures of prof. AS Chirkin in the Kazan Quantum Center of the KNITU-KAI

Lectures of prof. AS Chirkin in the Kazan Quantum Center of the KNITU-KAI

From the 9th to the 13th of April, 2018 the professor of the Moscow State University Anatoly Stepanovich Chirkin read his author lecture course for the staff and graduate students of the Kazan Quantum Center of the KNITU-KAI on modern problems and methods of theoretical quantum optics.

Anatoly Stepanovich Chirkin in 1963 graduated from the Physics Department of Moscow State University. He passed postgraduate studies under the direction of R. Khokhlov  and A. Akhmanov, the founders of nonlinear optics in the USSR. In 1977, Anatoly Stepanovich defended his doctoral thesis on “Coherence of laser radiation and the interaction of partially coherent waves in nonlinear media.” To date, he is a professor at the Department of General Physics and Wave Processes at the Physics Faculty of Moscow State University. A.S. Chirkin teaches courses “Mathematical models of fluctuation phenomena”, “Selected problems of quantum optics”, “Statistical optics”, “Quantum optics”, “Statistical radiophysics”, “Statistical and quantum optics”.

Lectures of Anatoly Stepanovich were devoted to the theory of optical quantum phenomena occurring in nonlinear crystals in the presence of intense laser pumping. The lectures covered a wide range of problems, starting with the basic quantum processes of generation of single photons:

  • Generation of photons in the pump eyes
  • The measure of the entanglement of the state of the generated photons
  • Generation of compressed states of light in nonlinear crystals. The theory of self-action
  • Balanced homodyne detection
  • Quantum field theory with a continuous spectrum
  • Theory of two-photon wave packets
  • Restoring the distribution of photons from the functions of the detector counts
  • Multimode filled quantum states in crystals
  • The ordering and factorization of a unitary operator
  • The general method of factorization of a unitary operator on the basis of the generalized Bogolyubov transformation
  • Quantum image methods
  • Multiplication
  • Phantom images
  • Special attention was also paid to the experimentally observed values ​​and the latest advances in the field of phantom quantum imaging.

The course of Anatoly Stepanovich was extremely important and useful for understanding the physics of nonlinear quantum processes, actively studied in the Kazan quantum center. We are grateful to Anatoly Stepanovich for the original lectures, answers to questions and we hope to see him again.

The most important achievements of Anatoly Stepanovich Chirkin

  • Laureate of the State Prize of the Russian Federation together with O.V. Rudenko for the series of works “Dynamics of intense noise waves and nonlinear structures in media without dispersion” (1997)
  • As part of the team for a series of works “Statistics of the light field of laser radiation and the laws of its transformation in nonlinear optical processes” was awarded the Prize. M.V. Lomonosov (1997).
  • Books and monographs: “Optics of femtosecond laser pulses” (co-author, 1988), manuals “Introduction to statistical radiophysics and optics” (co-author, 1981), “Statistical Radiophysics and Optics. Random oscillations and waves in linear systems “(co-author, 2010),” Mathematical models of fluctuation phenomena. Basic objectives of the course “(co-author, 2017).
    The main scientific works of A.S. Chirkina can be found on the website of the “Truth” system.
1-st Russian school on quantum technologies

1-st Russian school on quantum technologies

Employees of the Kazan Quantum Center KNITU-KAI took part in the work of the “First Russian school on quantum technologies”, which took place from March 18 to 23, 2018 in the village of. Esto-Sadok (Rosa Khutor, Krasnodar Region).

At the school, 15 plenary lectures were delivered by leading Russian scientists in the field of quantum technologies:

SP Kulik “Quantum processing of information: current state and prospects”
SA Moiseev “Quantum memory for quantum computing and communications”
II Ryabtsev “Experimental Quantum Informatics with Single Atoms”
Yu. I. Bogdanov “Quantum measurements and tomography”
VV Ryazanov “Quantum coherent devices based on Josephson junctions”
VV Pogosov “Algorithmic simulation of quantum systems on a quantum computer”
A. A. Kalachev “Optical quantum memory in impurity crystals”
KS Kravtsov “Quantum cryptography through atmospheric communication channels”
AA Toropov “Single-photon sources for quantum informatics”
AV Ustinov “Superconducting quantum circuits: physics and circuit engineering”
VL Eliseev “Practical aspects of the use of quantum key distribution for the protection of information”
A. V. Urivsky “Mechanisms for establishing the keys of a pair connection, or why do we need the quantum key distribution?”
S. V. Garbuk “Coordination of work carried out in the Russian Federation in the field of quantum technologies”
TV Pavlova “Quantum computer based on individual impurity atoms in the 28Si: 31 system State, problems and prospects”
SN Molotkov “Quantum Cryptography”
The first day was devoted to the problems of quantum interfaces and quantum memory. Director of the Center Dr.Sc. Moiseyev S.A. made a guest lecture on “Quantum memory for quantum computing and communications.” Also 25 posters were presented at the school. The staff of the Center is Ph.D. Gerasimov K.I. and PhD student Minnegaliev M.M. took part in the poster section with posters devoted to the “Broadband multiresonator interface for microwave memory” and “Dynamics of optically excited levels and ultrathin sublevels of the ground state of 167Er3 + ions in a 7LiYF4 crystal.” At the end of the day, discussions were held at the round table on topical problems of creating quantum memory.

The next day the schools presented papers on the topic of superconducting quantum computers, and the third day of the school’s work was devoted to the actual problems of quantum cryptography. At the end of each day of the work a round table was held with a comprehensive discussion of the current problems of quantum computing and quantum cryptography. The cultural program of the school included skiing on the Olympic routes in Sochi (see photos of Kazan school participants). With presentations and video recordings of speeches, as well as with the schedule of the past school can be found on the website of the school www.qutes.org

At the session

At the ski track in the free time

Seminar by Dr. Alexey Zheltikov

Kazan quantum center invites you to take part in a scientific seminar held by the Laboratory of photonics and quantum technologies. The main speaker being our dear colleague Dr. Alexey Mikhailovich Zheltikov with his talk “Ultrashort light pulses in quantum physics and quantum technologies”.

The seminar will take place at 11:30 26th of December in room #122.

Welcome!

Zheltikov Ultrashort pulses

Figure from one of A.M. Zheltikov’s works: Scientific Reports 7, Article number: 2103 (2017)

Заседание семинара-совещания «Состояние и перспективы развития квантовых технологий на предприятиях оборонно-промышленного комплекса (ОПК)»

11 ноября в рамках семинара-совещания на тему: «Состояние и перспективы развития квантовых технологий на предприятиях оборонно-промышленного комплекса (ОПК)» работники Казанского квантового центра представят серию докладов о текущем положении исследований в области квантовых технологий.

В том числе:

В рамках секции «Квантовые вычислительные системы»
Сергей Андреевич Моисеев. Казанский квантовый центр, КНИТУ-КАИ
«Квантовая память для квантовых компьютеров и коммуникаций»
В рамках секции «Квантовая криптография и системы передачи информации»
Артур Викторович Глейм. ИТМО, ООО «Квантовые коммуникации», КНИТУ-КАИ.
«Многоузловая квантовая сеть на основе технологии квантовой коммуникации на боковых частотах: опыт практической реализации»
Программа семинара доступна по ссылке: Programm

Thesis presentation by Tsukanov Alexander Viktorovich

Tsukanov Alexander Viktorovich representing Physics Technical Institute of Russian Academy of sciences will present a talk titled

Semi-conductor quantum dots with optic and electric control in quantum computers

The presentation will take place  10.11.2017 at Kazan quantum center conference room at 11:00, Chetaeva 18a, the 8th building of KNRTU-KAI. Listeners are welcome.

Quantum Memory in an Orthogonal Geometry of Silenced Echo Retrieval

In this paper we experimentally realize a quantum-memory protocol based on retrieval of silenced echo (ROSE) in Tm3+:Y3Al5O12 crystal in an orthogonal geometry of the signal and control light fields. The silenced echo signal revival efficiency of ∼13% with 36 μs storage time is demonstrated. To achieve that we implemented a high-precision atomic coherence control via amplitude- and phase-modulated laser pulses. We also discuss capabilities of this configuration, ways to increase quantum efficiency and to combine it with a single-mode optical cavity.

ROSE in Tm:YAG, 4.4% efficiency,  lower graph doublepass  configuration and 13% efficiency

Reading and writing of 4 and 10 pulses with the efficiencies of 5.6% and 4.4% respectively.

PhD thesis presentation by Mohsen Akbari

The PhD thesis by  Mohsen Akbari from Kazan E. K. Zavoisky Physical-Technical Institute, Kazan Federal University titled

Three-photon spontaneous dispestion and quantum logic gates in ring micro-resonators

Will be presented 22.06.2017 at 2:00 pm at the conference hall.

Three-photon spontaneous dispestion and quantum logic gates in ring micro-resonators

(c)  Mohsen Akbari

First in Russia multi-node quantum network presented to Rustam Minnikhanov

First in Russia multi-node quantum network presented to Rustam Minnikhanov

President of Tatarstan republic has visited Kazan quantum center to see the demonstration of multi-node quantum network, first ever built in Russia.

Colleagues from the Laboratory of quantum cryptography have successfully demonstrated the functionality of the network to Rustam Minnikhanov. President has also visited other laboratories and found out about recent achievements of Kazan quantum center, such as successful realization of 13% efficiency revival of silenced echo quantum memory.

See the follow up interview of Proff. Sergey Moiseev (ru)

Publication: Microwave Spin Frequency Comb Memory Protocol Controlled by Gradient Magnetic Pulses

New publication in Applied Magnetic Resonance by K. I. Gerasimov, S. A. Moiseev and R. B. Zaripov

Microwave Spin Frequency Comb Memory Protocol Controlled by Gradient Magnetic Pulses

Abstract

We have demonstrated a combination of frequency comb spin-echo protocol in a conventional microwave pulsed electron spin resonance spectrometer with gradient pulses of the external magnetic field applied for on-demand retrieval of signal microwave pulses at the required moments of time. A natural high-finesse periodic structure was used as a carrier of stored information. The structure is made out of hyperfine lines of electron spin resonance of tetracyanoethylene anion radicals in toluene at room temperature. Herein, we have also observed that using the pulses of gradient magnetic field can increase the memory capacity. The experimental results demonstrated promising opportunities for controlling electron nuclear spin coherence, which could be useful for implementation of broadband microwave or optical-microwave noise free quantum memory protocols.

https://link.springer.com/article/10.1007/s00723-017-0892-y

The first in Russia multi-nod quantum network launched in Kazan

The main advantage of quantum communications is their absolute protection from channel eavesdropping. Single photons that serve as information carriers in optical quantum communications are changed irreversibly after any attempt of signal interception allowing user to know about any unauthorized listeners. Quantum communication technologies serve as a basis for the future network security and will be integrated into Internet of Things concept that will radically change the everyday technological life. That is why quantum technology is being developed by many leading scientists all over the world. The most significant quantum networks are already built in USA (DARPA), Europe (SEQOQC), Japan (Toshiba) and China.

(с) Photo: ITMO University

Pilot segment of Kazan quantum network connecting two of the four existing nodes was tested in August 2016; now the communication between all four nodes is fully functional. It utilizes the new communication protocol that has been optimized for the city network. The network is realized in the active optical fiber lines of the “Tattelecom” provider. Two of the nodes were located in the commutation stations of “Tattelecom” on the different banks of Kazanka river and the other two in the KNIRTU-KAI buildings. The nodes were 10 km from one another while the optical cable length between the nodes reached 30-40 km during the testing stage.

During the network launch the control sequences and the demo files as well as the audio data in the quantum telephone regime has been transmitted. The basis for that is side-bands quantum communication technology that during testing showed qubit transmission speed over 100 kbit/s across some network regions.

This project creates the basis for the national quantum communications infrastructure development. The technology is to lay ground for  the new generation of the distributed secure networks: previously the network providers only provided the data delivery but now they will be able to also provide secure data transmission services, forming the multi-user trusted network. That will be achieved with the help of the scaling of our solution and development of the new standards in the field of quantum communications, – explains the chief of laboratory of quantum informatics of international institute of photonics and optoinformatics ITMO University and the Laboratory of quantum cryptography of Kazan quantum center Arthur Gleym. – Further development of Kazan network lies in two directions: firstly the improvement of the channel characteristics (e.g. speed, range) and secondly integration with other services starting with data processing centers and systems responsible for uninterrupted operation of the city economy and up to mobile communications for example messengers.

Arthur Viktorovich Gleym(с) Photo: ITMO University

Our collaboration with the ITMO is based on shared scientific interests and is very fortunate – comments the head of Kazan quantum center KNIRTU-KAI Sergey Moiseev. – The original scheme of quantum key distribution was created in Saint-Petersburg and we are helping to develop it. The laboratory KNIRTU-KAI has been working on quantum memory for more than 15 years, but our developments needed to have a practical implementation and our colleagues from ITMO needed quantum memory for the long-distance quantum communications. For more than two years now we successfully cooperate. In future we plan to create a quantum repeater (the signal amplifier that stores the quantum state and then transmits it through the channel, it allows one to increase the possible communication distance) and certify the network. Every day we conduct technical trials, develop the network, improve routing and stabilize the equipment.

Moiseev Sergey Andreevich

Previously in Russia only two-node quantum networks were launched in urban conditions. The first one was developed in ITMO University in 2014: the scientists connected the two buildings via optical fiber cable. In the June of 2016 Russian quantum center announced the launch of the next city communication line between the two Gazprom bank buildings and in the September of 2016 MSU announced the launch of quantum communication line connecting two towns in Moscow region. The Kazan project is first to connect the network of several clients – developers say that multi-node network requires principally new approaches and solutions than a point to point systems.

Kazan quantum network is created within the framework of National technological initiative in the direction of SafeNet, that is oriented to the development of new personal safety systems and quantum communications in Russia with the support of Quantum technologies consortium.