Papers
One-to-one quantum simulation of the low-dimensional frustrated quantum magnet TmMgGaO$_4$ with 256 qubits
Lucas Leclerc, Sergi Julià-Farré, Gabriel Silva Freitas +33 more·Mar 20, 2026
Low-dimensional materials exhibit exotic properties due to enhanced quantum fluctuations, making the understanding of their microscopic origin central in condensed matter physics. Analogue quantum simulators offer a powerful approach for investigatin...
Analyzing Decoders for Quantum Error Correction
Abtin Molavi, Feras Saad, Aws Albarghouthi·Mar 20, 2026
Quantum error correction (QEC) enables reliable computation on noisy hardware by encoding logical information across many physical qubits and periodically measuring parities to detect errors. A decoder is the classical algorithm that uses these measu...
Adaptive Parallelism-Aware Qubit Routing for Ion Trap QCCD Architectures
Anabel Ovide, Andreu Angles-Castillo, Carmen G. Almudever·Mar 20, 2026
Trapped-ion Quantum Charge-Coupled Device (QCCD) architectures promise scalability through interconnected trap zones and dynamic ion transport; however, this transport capability creates a complex compilation challenge: how to move qubits efficiently...
Quantum gyroscope based on three-dimensional rotation induced Berry phase
Huaijin Zhang, Zhang-Qi Yin·Mar 20, 2026
Solid-spin defects in diamond provide long coherence times and room-temperature optical initialization and readout, making them an attractive platform for compact solid-state quantum gyroscopes. A central challenge for NV-based gyroscopes is that the...
Beyond-Ten-Hour Coherence in a Decoherence-Free Trapped-Ion Clock Qubit
Jiahao Pi, Xiangjia Liu, Junle Cao +8 more·Mar 20, 2026
Quantum systems promise to revolutionize information processing science and technology [1-3]. The preservation of quantum coherence, the defining property of qubits, fundamentally constrains the performance of quantum information processing with quan...
Ultrastrong Coupling and Coherent Dynamics in a Gate-Tunable Transmon Qubit
I. Casal Iglesias, F. J. Matute-Cañadas, G. O. Steffensen +10 more·Mar 19, 2026
Ultrastrong light-matter coupling (USC) gives access to exotic quantum phenomena and promises faster quantum gates, yet coherent time-domain control in this regime remains largely unexplored. Here, we realize USC in a hybrid system consisting of an I...
Assessing Spatiotemporally Correlated Noise in Superconducting Qubits via Pulse-Based Quantum Noise Spectroscopy
Mayra Amezcua, Leigh Norris, Tom Gilliss +4 more·Mar 19, 2026
Spatiotemporally correlated errors are widespread in quantum devices and are particularly adversarial to error correcting schemes. To characterize these errors, we propose and validate a nonparametric quantum noise spectroscopy (QNS) protocol to esti...
Logarithmic growth of operator entanglement in a clean non-integrable circuit
Mao Tian Tan, Tomaž Prosen·Mar 19, 2026
We study a so-called semi-ergodic brickwork dual-unitary circuits where, in the infinite volume limit, the two-point correlation functions of single-site operators exhibit ergodic behavior along one light ray and non-ergodic behavior along the other ...
Quantum block encoding for semiseparable matrices
Giacomo Antonioli, Paola Boito, Gianna M. Del Corso +1 more·Mar 19, 2026
Quantum block encoding (QBE) is a crucial step in the development of most quantum algorithms, as it provides an embedding of a given matrix into a suitable larger unitary matrix. Historically, the development of efficient techniques for QBE has mostl...
XCOM: Full Mesh Network Synchronization and Low-Latency Communication for QICK (Quantum Instrumentation Control Kit)
Diego Martin, Luis H. Arnaldi, Kenneth Treptow +5 more·Mar 19, 2026
Quantum computing experiments and testbeds with large qubit counts have until recently been a privilege afforded only to large companies or quantum technologies where scaling to hundreds or thousands of qubits does not require a substantial increase ...
A generalized framework for quantum subspace diagonalization
Paul D. Nation, Abdullah Ash Saki, Hwajung Kang·Mar 19, 2026
We present a framework for computing the solution to Hamiltonian eigenproblems in a subspace defined by bit-strings sampled from a quantum computer. Hamiltonians are represented using an extended alphabet that includes projection and ladder operators...
On-chip Parametric Amplification in a Double Quantum Dots Circuit
Yong-Qiang Xu, Rui Wu, Si-Si Gu +8 more·Mar 19, 2026
In microwave-based quantum circuits, including double quantum dots (DQDs), superconducting qubits and spin qubits, parametric amplifiers are indispensable in achieving high-fidelity qubit readouts. Despite its importance, the application of parametri...
A 67%-Rate CSS Code on the FCC Lattice: [[192,130,3]] from Weight-12 Stabilizers
Raghu Kulkarni·Mar 19, 2026
We construct a three-dimensional Calderbank-Shor-Steane (CSS) stabilizer code on the Face-Centered Cubic (FCC) lattice. Physical qubits reside on the edges of the lattice (coordination $K=12$); X-stabilizers act on octahedral voids and Z-stabilizers ...
Learning Entanglement Quasiprobability from Noisy and Incomplete Data
Yu-Zhuo Li, Li-Chao Peng, Ke-Mi Xu·Mar 19, 2026
Negativities in quasiprobability distributions, a foundational concept originating in quantum optics, serve as a fundamental signature of quantum nonclassicality, with entanglement quasiprobabilities offering a necessary and sufficient criterion for ...
Observable-Conditioned Backaction in Dynamic Circuits: A Higher-Order Context-Conditioned Kernel for Local Dynamics
Petr Sramek·Mar 19, 2026
Mid-circuit measurements are essential primitives for dynamic circuits and quantum error correction, yet characterizing their induced disturbance on spectator qubits remains a central practical problem. Device-level benchmarking often compresses this...
Alice and Bob through a quantum mirror
M. Uria, C. Hermann-Avigliano, P. Solano +1 more·Mar 19, 2026
A quantum mirror is a device whose optical response, that is, transmission and reflection, can be controlled by a single qubit. Here, we propose the use of quantum mirrors as nodes in quantum networks. Propagating coherent states mediate the interact...
Multi-Outcome Circuit Optimization for Enhanced Non-Gaussian State Generation
S. Ismailzadeh, B. Abedi Ravan·Mar 18, 2026
Photonic quantum computing has gained significant interest in recent years due to its potential for scaling to large numbers of qubits. A critical requirement for fault-tolerant quantum computation is the reliable generation of non-Gaussian quantum s...
Adaptive Loss-tolerant Syndrome Measurements
Yuanjia Wang, Todd A. Brun·Mar 18, 2026
In the presence of qubit losses, the building blocks of fault-tolerant error correction (FTEC) must be revisited. Existing loss-tolerant approaches are mainly architecture-specific, and little attention has been given to optimizing the syndrome measu...
Exploration of Fluxonium Parameters for Capacitive Cross-Resonance Gates
Eugene Y. Huang, Christian Kraglund Andersen·Mar 18, 2026
We study the cross-resonance effect in capacitively-coupled fluxonium qubits and devise a simple formula for their maximum ZX interaction strength. By going beyond the perturbative regime, we find that a CNOT gate can generally be realized in under 2...
Uncertainty equality for SU(N) observables enabling the experimentally friendly detection of k-inseparability via purity measurements
G. Tartaglione, G. Zanfardino, F. Illuminati·Mar 18, 2026
We derive an exact uncertainty relation for arbitrary quantum states of finite-dimensional Hilbert spaces. For any given $k$-partition of a $d$-dimensional multipartite system, we introduce the total uncertainty as the sum of the uncertainties associ...