Quantum Information Processing with Atomically Thin Semiconductors

Projektinformationen

QUIPATS

ID Finanzhilfevereinbarung: 101023276

DOI

10.3030/101023276

Projekt abgeschlossen

EK-Unterschriftsdatum 17 März 2021

Startdatum 1 Mai 2021

Enddatum 30 April 2023

Finanziert unter

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Gesamtkosten

€ 162 806,40

EU-Beitrag

€ 162 806,40

Koordiniert durch

MAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN EV
Germany

Periodic Reporting for period 1 - QUIPATS (Quantum Information Processing with Atomically Thin Semiconductors)

Berichtszeitraum: 2021-05-01 bis 2023-04-30

Zusammenfassung vom Kontext und den Gesamtzielen des Projekts

Quantum technologies have the potential to transform modern communication and information processing. Quantum technologies make use of the laws of quantum mechanics to improve over technologies based on classical physics that we experience in everyday life. Two important examples are quantum key distribution and quantum computation: The former enables provably secure communication while the latter can solve certain hard problems that are intractable with conventional computers.

Despite tremendous recent progress, the commercialization of quantum technologies remains in its infancy. The key challenge is to protect the extremely fragile quantum states from detrimental noise. There exist many competing platforms aiming to overcome this hurdle, each with its own strengths and weaknesses. In the project QUIPATS, I explored how two-dimensional semiconductors may address some limitations of current approaches. Two-dimensional semiconductors are materials composed of one or few layers of atoms. They interact strongly with light, which renders them promising candidates for interfaces that receive, manipulate, and transmit quantum information.

The objectives of QUIPATS were to develop software and theoretical tools to model the optical properties of two-dimensional semiconductors. These tools were then applied to design novel optical devices in collaboration with experimental researchers at Harvard University. The findings highlight the promise of two-dimensional semiconductors for a wide range of quantum technological applications.

Arbeit, die ab Beginn des Projekts bis zum Ende des durch den Bericht erfassten Berichtszeitraums geleistet wurde, und die wichtigsten bis dahin erzielten Ergebnisse

As part of QUIPATS, I created a software package to accurately predict the optical response of two-dimensional semiconductors embedded in an arbitrary stack of layered media. Results from the software guided the design of a beam-steering device fabricated by collaborating researchers at Harvard University. In addition, I developed novel algorithms to compute the dynamics of complex quantum many-body systems, which may serve to study the nonlinear optical response of two-dimensional semiconductors.

The findings were published in two peer-reviewed articles in the journals Nature Communications and PRX Quantum with full open access. I also presented the results at multiple conferences and seminars in Europe and the USA.

Fortschritte, die über den aktuellen Stand der Technik hinausgehen und voraussichtliche potenzielle Auswirkungen (einschließlich der bis dato erzielten sozioökonomischen Auswirkungen und weiter gefassten gesellschaftlichen Auswirkungen des Projekts)

The project produced powerful tools to model two-dimensional semiconductors. The photonics software package outperforms commercial software based on finite-element methods by instead employing a scattering theory formalism tailored to layered media. The novel algorithms for quantum dynamics achieve a better complexity-theoretical scaling than all previously known algorithms. The results contribute to our understanding of quantum many-body physics and drive forward the development of quantum optical devices, which are key to building quantum communication networks and quantum computers. The insights may find use in the commercialization of quantum technologies, which is the goal of a growing industrial effort that includes start-up companies and established technology companies. If successful, these efforts may have a large societal impact by, for instance, enabling currently intractable computations that aid the design of novel materials for affordable and sustainable technologies.

Device used to steer light at the nanosecond time scale.