L. Sommer, I. Seidler, F. J. Schupp, S. Paredes, N. W. Hendrickx, L. Massai, K. Tsoukalas, A. Orekhov, E. G. Kelly, S. W. Bedell, G. Salis, M. Mergenthaler, P. Harvey-Collard, A. Fuhrer, T. Ihn • Published: 2026-02-10
Spin qubits are typically operated in the lowest orbital of a quantum dot to minimize interference from nearby states. In valence-band hole systems, strong spin-orbit coupling links spin and orbital degrees of freedom, strongly influencing the hole $g$-factor, a key parameter for qubit control. We investigate the out-of-plane $g$-factor in Ge quantum dots using excitation (single-particle) and add...
Yufeng Wu, Yiyu Zhou, Haoqi Zhao, Danqing Wang, Matthew D. LaHaye, Daniel L. Campbell, Hong X. Tang • Published: 2026-02-27
Superconducting quantum processors operate at microwave frequencies in millikelvin environments, making it challenging to interconnect distant nodes using conventional microwave wiring. Coherent microwave-to-optical (M2O) transduction enables superconducting quantum networks by interfacing itinerant microwave photons with low-loss optical fiber. However, many state-of-the-art transducers provide e...
Victor Morel, Cristiana Santos, Pontus Carlsson, Joel Ahlinder, Romaric Duvignau • Published: 2026-02-23
The Transparency and Consent Framework (TCF), developed by the Interactive Advertising Bureau (IAB) Europe, provides a de facto standard for requesting, recording, and managing user consent from European end-users. This framework has previously been found to infringe European data protection law and has subsequently been regularly updated. Previous research on the TCF focused exclusively on web co...
Waqas Ahmad, Gioele Consani, Mohammad Tasnimul Haque, Jacob Dunstan, Brian Vlastakis • Published: 2026-02-27
Microwave filtering for superconducting qubits is a key element of quantum computing technology, enabling high coherence and fast state detection. This work presents the design and implementation of novel microwave Purcell filters for superconducting quantum circuits, integrated within a multilayer printed circuit board (PCB). The off-chip design removes all filter components from the qubit substr...
Cédrick Perron, Yves Bérubé-Lauzière, Victor Drouin-Touchette • Published: 2025-10-06
In this work, we develop new pulse designs and embedding strategies to improve the analog quantum subroutines of hybrid column generation (CG) algorithms based on neutral-atoms quantum computers (NAQCs). These strategies are designed to improve the quality and diversity of the samples generated. We apply these to an important combinatorial optimization (CO) problem in logistics, namely the fleet a...
Alejandro Gomez Cadavid, Ananth Kaushik, Pranav Chandarana, Miguel Angel Lopez-Ruiz, Gaurav Dev, Willie Aboumrad, Qi Zhang, Claudio Girotto, Sebastián V. Romero, Martin Roetteler, Enrique Solano, Marco Pistoia, Narendra N. Hegade • Published: 2026-02-27
We present an end-to-end pipeline for large-scale portfolio selection with cardinality constraints and experimentally demonstrate it on trapped-ion quantum processors using hardware-aware decomposition. Building on RMT-based correlation-matrix denoising and community detection, we identify correlated asset groups and introduce a correlation-guided greedy splitting scheme that caps each cluster by ...
Javier Oliva del Moral, Olatz Sanz Larrarte, Reza Dastbasteh, Josu Etxezarreta Martinez, Rubén M. Otxoa • Published: 2024-11-28
Spin qubits in quantum dots are a promising technology for quantum computing due to their fast response time and long coherence times. An electromagnetic pulse is applied to the system for a specific duration to perform a desired rotation. To avoid decoherence, the amplitude and gate time must be highly accurate. In this work, we aim to study the impact of leakage during the gate time evolution of...
Yuichiro Yoshida, Takuma Murokoshi, Rika Nakagawa, Chihiro Mori, Yuta Katayama, Naoya Kuroda, Shigeki Furukawa, Hanae Tagami, Wataru Mizukami • Published: 2026-02-08
We propose doubly occupied configuration interaction-quantum selected configuration interaction (DOCI-QSCI), which samples from the seniority-zero space. While the use of this space effectively doubles the qubit budget, equaling the number of spatial orbitals, this sector restriction can compromise quantitative accuracy. To compensate for this, we expand sampled bitstrings via their Cartesian prod...