Papers

Aditi Awasthi, Gokul Subramanian Ravi, Jonathan Mark Baker·Jun 17, 2026

Fault-tolerant quantum computation requires the coordinated action of three distinct systems: classical control logic, quantum hardware, and classical error decoders. Current scheduling models treat logical operations as atomic, hiding the fact that ...

Sara Tarquini, Matteo Vandelli, Francesco Ferrari +2 more·Jun 17, 2026

We study the problem of emergency operation center placement in disaster response, where a minimal number of hubs must be selected to ensure timely coverage of all affected locations. This task can be formulated as a minimum dominating set problem on...

Ben Saarel, Ozgur Sahin, Hartmut Häffner +1 more·Jun 17, 2026

Electric field noise produced by the surface of ion trap electrodes reduces the fidelity of quantum computing operations. Despite decades of investigation its microscopic origins remain unclear. Here, we measure electric field noise at trapping locat...

Luis Adrián Lizama-Pérez·Jun 17, 2026

We propose and analyze a Bell-state extension of the Loop-Back quantum key distribution architecture for secret-key establishment between two passive users that do not require quantum transmitters or quantum detectors. In the proposed setting, a sing...

Santiago Cifuentes·Jun 17, 2026

We study the problem of deciding, given a mechanism to prepare a quantum state $ρ$ and a value $\varepsilon > 0$, whether there is some non-identity Pauli matrix $P$ such that $|Tr(P ρ)| \geq \varepsilon$. We consider that the state $ρ$ is described ...

Magdalini Zonnios, Felix C. Binder·Jun 17, 2026

Distinguishing multi-time quantum processes is a fundamental task underlying the diagnosis, benchmarking, and learning of temporally correlated quantum dynamics. The standard benchmark for distinguishing two processes is the strategy-norm distance, w...

Hiroki Nakabayashi·Jun 17, 2026

The Gorini--Kossakowski--Lindblad--Sudarshan (GKLS) equation describes irreversible quantum dynamical semigroups. We show that this description cannot be exact under physically regular energy conditions. We prove that the open-system survival probabi...

Georgios Arapantonis, Paraj Titum, Gregory Quiroz·Jun 17, 2026

Entanglement is widely regarded as a key resource underlying the power of quantum algorithms and their potential to achieve quantum advantage. With the emergence of variational quantum algorithms, however, questions have arisen regarding how entangle...

Andrew Lesniewski·Jun 17, 2026

The Bures--Helstrom metric is the minimal monotone Riemannian metric on the state space of a qubit. With the quantum Fisher normalization used here, it identifies the Bloch ball with a geodesic hemisphere of the unit round three--sphere. We describe ...

Taiqi Zhou, Weiyuan Gong·Jun 17, 2026

Characterizing the features of a Hamiltonian that governs a quantum system serves as a fundamental subroutine of quantum device calibration, signal sensing, and error correction. Recent works proposed protocols have achieved the optimal Heisenberg-li...

Boren Gu, Tamas Noszko, Vincent Steffan +4 more·Jun 17, 2026

High-performance quantum low-density parity-check codes promise substantial reductions in the overhead of fault-tolerant quantum computation, but most constructions require long-range connectivity or qubit shuttling, both of which are difficult to re...

Tommaso Francalanci, Nicolò Spagnolo, Mario Sigalotti +3 more·Jun 17, 2026

Photonic linear optical networks provide a versatile platform for quantum information processing and quantum state engineering. However, the set of states that can be generated using passive linear optics alone is fundamentally constrained by bosonic...

V. Mariscal, J. J. Relancio, L. Santamaría-Sanz·Jun 17, 2026

This work explores the effects of both the standard quantum $q$-deformation and the non-standard $h$-deformation of the Hopf algebra $\mathcal{U}(\mathfrak{sl}(2, \mathbb{R}))$ on multi-qubit systems. By constructing the states of a Hilbert space of ...

Hamza Jnane·Jun 17, 2026

Quantum computers promise to solve the electronic structure problem for a large class of molecules. However, the performance of relevant quantum algorithms hinges on preparing initial states with substantial overlap with the target eigenvector. For c...

Hanteng Wang, Xingyu Li, Shang Liu +2 more·Jun 17, 2026

Rydberg atom simulators, in both analog and digital modes, have attracted significant recent interest due to their versatile geometric reconfigurability. In this work, leveraging this feature, we propose two complementary approaches, one for each mod...

Fabio Costa, Giulia Rubino, Cyril Branciard +2 more·Jun 17, 2026

In recent years, operational approaches to quantum foundations have been developed as a means of understanding the core principles and distinctive features of quantum theory. Such approaches typically view physical processes as sequences of operation...

Yuxiao Hang, Stephan Haas, Rishabh Jha·Jun 17, 2026

Quantum quenches drive edge states far from equilibrium, yet whether the memory of a topological initial state survives in a non-integrable, interacting system has remained largely unexplored. We study this question in the bond-alternating XXZ chain ...

Xiao-Yang Yang, He-Ran Wang, Zhong Wang·Jun 17, 2026

Studies of integrable systems have profoundly deepened the fundamental understanding of quantum many-body physics. While equilibrium properties such as ground states and thermodynamics can often be characterized efficiently, accurately characterizing...

Ben Blain, Giampiero Marchegiani, Luigi Amico +1 more·Jun 17, 2026

Superconducting qubits are artificial atoms whose spectra and interactions can be engineered through appropriate circuit design, a versatility that can be exploited for quantum simulation. We theoretically investigate a linear array of capacitively c...

Daniel Harkin, Chun Y. Leung, Amos Chan·Jun 17, 2026

In equilibrium physics, topological defect insertions in quantum and classical partition functions provide non-perturbative probes of phase transitions beyond local observables. In non-equilibrium physics, the spectral form factor provides a minimal ...