Dhruv Deepak Agarwal, Aswani Kumar Cherukuri • Published: 2025-11-06
The growth of cloud computing has revolutionized data processing and storage
capacities to another levels of scalability and flexibility. But in the
process, it has created a huge challenge of security, especially in terms of
safeguarding sensitive data. Classical security practices, including encryption
at rest and during transit, fail to protect data in use and expose it to
various possible brea...
Brandon Severin, Tim Botzem, Federico Fedele, Xi Yu, Benjamin Wilhelm, Holly G. Stemp, Irene Fernández de Fuentes, Daniel Schwienbacher, Danielle Holmes, Fay E. Hudson, Andrew S. Dzurak, Alexander M. Jakob, David N. Jamieson, Andrea Morello, Natalia Ares • Published: 2025-11-06
Donor spin qubits in silicon offer one- and two-qubit gates with fidelities
beyond 99%, coherence times exceeding 30 seconds, and compatibility with
industrial manufacturing methods. This motivates the development of large-scale
quantum processors using this platform, and the ability to automatically tune
and operate such complex devices. In this work, we present the first machine
learning algorit...
Benedikt Tissot, Soubhadra Maiti, Emil R. Hellebek, Anders Søndberg Sørensen • Published: 2025-11-06
Different quantum systems possess different favorable qualities. On the one
hand, ensemble-based quantum memories are suited for fast multiplexed
long-range entanglement generation. On the other hand, single-atomic systems
provide access to gates for processing of information. Both of those can
provide advantages for high-rate entanglement generation within quantum
networks. We develop a hybrid ar...
Lars Krupp, Daniel Geißler, Vishal Banwari, Paul Lukowicz, Jakob Karolus • Published: 2025-11-06
Web agents, like OpenAI's Operator and Google's Project Mariner, are powerful
agentic systems pushing the boundaries of Large Language Models (LLM). They can
autonomously interact with the internet at the user's behest, such as
navigating websites, filling search masks, and comparing price lists. Though
web agent research is thriving, induced sustainability issues remain largely
unexplored. To hig...
Robert Stárek, Tim Gollerthan, Olga Leskovjanová, Michael Meth, Peter Tirler, Nicolai Friis, Martin Ringbauer, Ladislav Mišta Jr • Published: 2025-10-14
A central concept in quantum information processing is genuine multipartite
entanglement (GME), a type of correlation beyond biseparability, that is,
correlations that cannot be explained by statistical mixtures of partially
separable states. GME is relevant for characterizing and benchmarking complex
quantum systems, and it is an important resource for applications such as
quantum communication. ...
Matteo Robbiati, Edoardo Pedicillo, Andrea Pasquale, Xiaoyue Li, Oriel Kiss, Andrew Wright, Renato M. S. Farias, Khanh Uyen Giang, Jeongrak Son, Johannes Knörzer, Siong Thye Goh, Jun Yong Khoo, Nelly H. Y. Ng, Zoë Holmes, Stefano Carrazza, Marek Gluza • Published: 2024-08-07
Ground state preparation is a central application for quantum computers but
remains challenging in practice. In this work, we quantitatively investigate
the performance and gate counts of double-bracket quantum algorithms (DBQAs)
for ground state preparation. We propose a practical strategy in which DBQAs
refine initial state preparation circuits, and we compile them for Heisenberg
chains using co...
Raphael Brinster, Peter Tirler, Shishir Khandelwal, Michael Meth, Hermann Kampermann, Dagmar Bruß, Rainer Blatt, Martin Ringbauer, Armin Tavakoli, Nikolai Wyderka • Published: 2025-11-06
Determining the conditions under which positive operator-valued measures
(POVMs), the most general class of quantum measurements, outperform projective
measurements remains a challenging and largely unresolved problem. Of
particular interest are projectively simulable POVMs, which can be realized
through probabilistic mixtures of projective measurements, and therefore offer
no advantage over proje...
V. Champain, G. Boschetto, H. Niebojewski, B. Bertrand, L. Mauro, M. Bassi, V. Schmitt, X. Jehl, S. Zihlmann, R. Maurand, Y. -M. Niquet, C. B. Winkelmann, S. De Franceschi, B. Martinez, B. Brun • Published: 2025-09-19
Recent advances in scaling up spin-based quantum processors have revealed
unanticipated issues related to thermal effects. Microwave pulses required to
manipulate and read the qubits are found to overheat the spins environment,
which unexpectedly induces Larmor frequency shifts, reducing thereby gate
fidelities. In this study, we shine light on these elusive thermal effects, by
experimentally char...