The DSQT conference aims to bring together world-leading theoreticians and experimentalists active in the field of quantum devices based on solid-state qubits to improve interdisciplinary cooperation overcoming traditional boundaries between scientific disciplines.

New information: Agenda at a glance

New information: Poster session

New information: Venue Layout

Registration is now open here: https://dsqt.register-now.eu/

Early bird registration is until 15th of May.

The registration fee is 400 EUR +VAT for early bird participants and 500 EUR +VAT for regular participants. The registration fee is reduced to 200 EUR +VAT for early bird PhD student (researchers without PhD degree) participants.

The registration fee includes admission to all the scientific events at the conference. In addition, it covers lunches, coffee breaks, the conference dinner and social events organized at the conference.

VAT information: Reverse charge (0%) for EU VAT number of the institute;
0% VAT for third countries with VAT number of the institute; 27% VAT for individuals and Hungarian participants

Form of the conference

DSQT2024 will be an onsite conference with only in-person participation. However, options to give presentations remotely will be considered if necessary.

Venue

The conference will take place at the Faculty of Science, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, Hungary.

Contact 

If you have any questions, you may contact us via emailing to dsqt2024-inquiry@wigner.hun-ren.hu.

Warning

We have been informed about several phishing attempts associated with DSQT2024 workshop.

We would like to emphasize that the organizing committee will never ask your personal data (including your email address, bank account, or credit card numbers) for any reason via emails. Please, write to the organizers if you feel that you have received a suspicious email associated with DSQT2024 workshop.

Information for presenters

Speakers

Invited speakers: 35 minutes talk + 5 minutes discussion

Contributing speakers: 15 minutes talk + 5 minutes discussion

The speakers should bring their own computers. The optimum canvas format is 4:3 but the 16:9 canvas format can be also well projected at the conference site. The projector is connected to the computer with HDMI/VGA interface. Please, bring adapters (e.g., MacIntosh laptops or laptops with USB-C connectors) if you do not have HDMI/VGA interface at your computer.
 

Posters

The preferred poster format is standing "A0" size.

We recommend printing your poster before leaving for the conference. You may find printing services in Budapest where you can print your poster with your own risk and cost.

Best poster award

The organization committee will select the "Best poster award" of the conference with the prize of 500 EUR.

Abstract submission

The abstract submission is open and closes on the 1st of April 2024 (23:59 CET). 

The abstract submission deadline is extended to 8th of April 2024 (23:59 CET).

To submit your abstract, first register for a CECAM account if you do not have one, click on the Participate item in the menu bar at the top of the webpage. Log in and fill in the form following the instructions below.

Motivation  Either leave this field blank or mention what topics you are interested in most and what your expectations are about the conference. Please indicate here if you would like to present a poster.

Your message  Enter your abstract here or upload your abstract as a pdf-file. In the latter case leave this field blank.

The abstract should include a title, author information with the presenter marked, and the body of the abstract. It may contain references, funding information, and a figure. Minimal font size is 11pt and the contents should not exceed one A4 page.

To upload your abstract as a pdf-file: Send in the form and then log in to Cecam at https://members.cecam.org/. Then go to the conference Cecam page by selecting it under "My events as a participant" (click the ”pen” symbol on the side). On the conference page, go to "Documents" and click the "Add a file" button. Upload it there, and it will be shared with the organizers.

Conference Dinner & Excursion

Participants can enjoy a buffet dinner while cruising under the illuminated bridges connecting Buda and Pest.

Banquet on Wednesday Cruising and having dinner on the River Danube participants will enjoy magnificent views of historical Budapest. Sailing out in the setting sun and back with glistening lights one will catch a glimpse of Margaret Island, the Parliament, Hotel Gellért, the Liberty Statue, the graceful bridges and a number of stunning buildings of Budapest, while tasting traditional Hungarian and exquisite international meals and drinks.

Hotel

The accommodation is not organized centrally, the attendees may select their best option in Budapest individually.

Visa

In case you need a visa to enter Hungary, contact us well in advance to be able to prepare the necessary invitation letter for you. 

Public Transport & Directions

The venue is located at ELTE campus, which is on the Buda side close to the Petőfi-bridge.

Commuting to the conference one may:

Take metro M4 to Gellért Square and walk to the site (about 20 minutes). Take tramline 4 or 6 to "Petőfi híd, budai hídfő" (Petőfi bridge, Buda side) and walk to the site (5 minutes).

Please keep in mind to avoid crowds during rush hours if you decide to take public transportation.

Invited speakers

THEORY

Denmark

Kristian Sommer Thygesen (DTU)

Hungary

Anton Pershin (Wigner Research Centre for Physics)

Israel

Sivan Refaely-Abramson (Weizmann Institute of Science)

Italy

Marco Govoni (University of Modena and Reggio Emilia)

Sweden
Oscar Bulancea-Lindvall (Linköping University)

USA

Volker Blum (Duke University)

Liang Tan (LBNL)

David Strubbe (University of California, Merced)

Cyrus E. Dreyer (Stony Brook University)

EXPERIMENT

Austria

Michael Trupke (Austrian Academy of Sciences)

France

Patrice Bertet (University of Paris-Saclay)

Anaïs Dréau (Université de Montpellier)

Germany

Jörg Wrachtrup (University of Stuttgart)

Fedor Jelezko (University of Ulm)

Andreas Reiserer (Technische Universität München)

Aparatija Singha (Max Planck Institute, Stuttgart)

United Kingdom

Hannah L. Stern (Cambridge University)

Cristian Bonato (Heriot-Watt University)

USA

Burcu Ozden (Penn State Abington)

More about the topic and the conference

SIGNIFICANCE

We are in the midst of a second quantum revolution based on harnessing quantum information, superposition, entanglement, and measurement for new tasks in quantum science and technology. Quantum computers have the potential to solve such problems that classical computers cannot address, quantum states allow for secure communications whose security is guaranteed by the laws of physics, and quantum sensing opens up new frontiers in resolution and sensitivity. These technologies are all built on controllable quantum systems with quantum states that can be used as fiducial quantum bit (qubit) states. Implementations of qubits include single atoms or ions trapped in vacuum or in a crystal lattice, superconducting circuits, single photons emitted from quantum dots, and single photons/spins associated with point defects in semiconductors [1,2]. A very important parameter of qubits is the coherence time that should be significantly longer than the operation time in the quantum information processing. In practice, quantum states are fragile and may be readily disturbed by external noise such as electromagnetic waves. This phenomenon can be turned to an advantage when qubits are applied for noise spectroscopy to sense very weak fields to enable quantum sensing.   

Although the first intermediate-scale quantum computers are now being built and developed in industry, the winning platform is far from being established. Similarly, there exist commercial single photon sources, but none that are connected to quantum memories that would allow for scalable quantum networks, motivating immense activity in discovering and developing new platforms that could form the basis of a large scale quantum network. For quantum sensors, the leading candidate is the complex of a vacancy and a nearby N atom (NV center) in diamond [3-5], nevertheless, there are still important materials science obstacles to fully exploit the remarkable properties of this exemplary solid state defect qubit.

Solid state defect qubits such as the NV center in diamond can offer quantum memories (e.g., electronic or nuclear spins), spin-photon interfaces (quantum communication), and ready integration into solid-state devices. Furthermore, realizing these qubits in technologically mature semiconductors such as silicon or silicon carbide is a promising way to interconnect semiconductor and quantum technologies in a single materials platform. However, scaling up defect qubits in three-dimensional materials is extremely challenging. On the other hand, defect creation in 2D materials or synthesis of identical spin-molecules in the matrix of spin-less molecules seem viable, thus these spin systems are of high interest for realizing defect qubits quantum computer platforms and quantum sensors [6,7]. The discovery of single photon sources and optically detected magnetic resonance centers in the two-dimensional (2D) hBN [6-8] have led to a great interest in both the experimental and theoretical fronts for understanding existing defect spins and exploring and identification of novel ones in hBN and other 2D materials. This conference aims to stimulate a synergistic effort of theoreticians and experimentalists towards discovering functional point defects in a set of accessible defect spin systems that have not been or have just recently been considered for applications, and provide the most recent update on challenges and progress in ab-initio prediction on quantum defect properties. 

SCIENTIFIC NOVELTY

Currently, mainly diamond and SiC have been considered as host materials for point defect for quantum technologies. Restricting the research of functional point defect to this tiny subset of 3D materials can be major obstacle in the development practical applications. There are numerous potentially interesting 2D and 3D semiconductors, each of which may host hundreds of different point defect with several stable charge states. So far only a handful of those have been tested as potential hosts for room-temperature and scalable qubits. Very recently, machine-learning techniques have been launched to seek potential candidates in various materials to build up databases that mostly rely on supercell plane wave density functional theory calculations. On the other hand, the accuracy of these databases should be greatly improved which requires methodology developments to calculate the excited states of point defects embedded in solids with high accuracy including the electron-phonon coupling and spin-orbit coupling. Furthermore, the interaction of the electron spin with phonons and other spins can limit the coherence times of the defect qubit spins that should be also explored. Recent implementations combining post Hartree-Fock methods with density functional theory (also called quantum defect embedding theory), density matrix embedding theory, spin flipping time-dependent density functional theory and many-body perturbation theories have been applied to study the complex physics of point defects in solids as well as methods to compute the longitudinal spin-relaxation times and the spin coherence times (see a recent review, Ref. [9]) where the implementation of some of these codes to quantum computers is in reach. During the conference, we will address the recent methodological advances and discuss their inherent approximations for capturing the physics of point defects. Innovation is rooted in the collaboration of scientists of different experiences. By bringing together prominent members of different communities and providing place and time for the discussions, the conference will contribute to the opening of new directions in the field. The conference will stimulate a systematic exploration of the vast yet unexplored area of alternative materials hosting novel point defects with high potential for the next generation quantum technologies.