Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Inapplicability of Avila's theory in the diamond chain with quasiperiodic disorder
Manish Kumar, Ivan M. Khaymovich, Auditya Sharma·Mar 12, 2026
The mobility edges (MEs) that separate localized, multifractal and ergodic states in energy are a central concept in understanding Anderson localization. In this work we study the effect of several mutually commensurate quasiperiodic frequencies on t...
Quantum algorithms for compact polymer thermodynamics
Davide Rattacaso, Daniel Jaschke, Antonio Trovato +2 more·Mar 12, 2026
Efficient sampling from ensembles of Hamiltonian cycles is critical for predicting the thermodynamic properties of compact polymers, with applications including modeling protein and RNA folding and designing soft materials. Although classical Monte C...
A Traveling-Wave Parametric Amplifier With Integrated Diplexers
C. Denney, K. Genter, K. Cicak +4 more·Mar 12, 2026
Traveling-Wave Parametric Amplifiers (TWPAs) are ubiquitous in superconducting circuit readout, providing high gain with near-quantum-limited noise performance across a wide bandwidth. Their operation, however, relies on a strong microwave pump tone ...
Qubit measurement and backaction in a multimode nonreciprocal system
B. T. Miller, Lindsay Orr, A. Metelmann +1 more·Mar 12, 2026
High fidelity qubit readout is a cornerstone for quantum information protocols. In traditional superconducting qubit readout, a chain of microwave amplifiers and nonreciprocal components aid in detecting the qubit's state with tolerable added noise a...
Onset of Ergodicity Across Scales on a Digital Quantum Processor
Faisal Alam, Marcos Crichigno, Elizabeth Crosson +7 more·Mar 12, 2026
Understanding how isolated quantum many-body systems thermalize remains a central question in modern physics. We study the onset of ergodicity in a two-dimensional disordered Heisenberg Floquet model using digital quantum simulation on IBM's Nighthaw...
Transition from Statistical to Hardware-Limited Scaling in Photonic Quantum State Reconstruction
Attila Baumann, Zsolt Kis, János Koltai +1 more·Mar 12, 2026
The theoretical efficiency of classical shadow tomography is predicated on a perfect Haar-random unitary ensemble, yet this mathematical ideal remains physically unattainable in near-term hardware. Here, we report the experimental discovery of a fund...
Thermalisation as Diffusion in Hilbert Space
Aleksey Lunkin·Mar 12, 2026
We develop a microscopic theory of thermalisation for a thermometer coupled to a many-body bath beyond standard Markovian and Fermi-golden-rule assumptions. By modeling interaction matrix elements in the non-interacting basis as independent random va...
Quantum-Secure-By-Construction (QSC): A Paradigm Shift For Post-Quantum Agentic Intelligence
Arit Kumar Bishwas, Mousumi Sen, Albert Nieto-Morales +1 more·Mar 12, 2026
As agentic artificial intelligence systems scale across globally distributed and long lived infrastructures, secure and policy compliant communication becomes a fundamental systems challenge. This challenge grows more serious in the quantum era, wher...
Sparse Phase Ansatzes for Resource-Efficient Qudit State Preparation via the SNAP-Displacement Protocol
Maurizio Ferrari Dacrema·Mar 12, 2026
Efficient preparation of nonclassical bosonic states is a central requirement for quantum computing, simulation, and precision metrology. We study resource-efficient quantum state preparation in bosonic qudit systems using the SNAP-displacement (SD) ...
Commutation Groups and State-Independent Contextuality
Samson Abramsky, Serban-Ion Cercelescu, Carmen-Maria Constantin·Mar 12, 2026
We introduce an algebraic structure for studying state-independent contextuality arguments, a key form of quantum non-classicality exemplified by the well-known Peres-Mermin magic square, and used as a source of quantum advantage. We introduce \emph{...
Optimal Discrimination of Gaussian States by Gaussian Measurements
Leah Turner, Ludovico Lami, Madalin Guta +1 more·Mar 12, 2026
Are Gaussian measurements enough to distinguish between Gaussian states? Here, we tackle this question by focusing on the max-relative entropy as an operational distinguishability metric. Given two general multimode Gaussian states, we derive a condi...
Frequency Comb Behavior of Time Crystals in an RF-Driven Dissipative Rydberg System
Dixith Manchaiah, William J. Watterson, Christopher L. Holloway·Mar 12, 2026
Driven nonlinear oscillators constitute a universal paradigm for understanding synchronization, frequency pulling, and frequency comb formation in nonequilibrium systems. Here, we realize such an emergent nonlinear oscillator in strongly interacting ...
Optimal control with flag qubits
Liang-Xu Xie, Lui Zuccherelli de Paula, Weizhou Cai +6 more·Mar 12, 2026
High-fidelity quantum operations are the cornerstone of fault-tolerant quantum computation. In open quantum systems, traditional optimal control only passively resists decoherence, leaving environment-induced uncertainty as a fundamental performance ...
Quantum lower bounds for simulating fluid dynamics
Abtin Ameri, Joseph Carolan, Andrew M. Childs +1 more·Mar 12, 2026
Developing quantum algorithms to simulate fluid dynamics has become an active area of research, as accelerating fluid simulations could have significant impact in both industry and fundamental science. While many approaches have been proposed for sim...
Raman relaxation in Yb(III) molecular qubits: non-trivial correlations between spin-phonon coupling and molecular structure
Giacomo Sansone, Lorenzo A. Mariano, Stefano Carretta +2 more·Mar 12, 2026
The coordination complexes of Yb(III) exhibit some of the longest spin coherence times among 4f compounds, making them a promising platform for molecular quantum technologies. While spin-phonon relaxation remains a limiting factor for coherence times...
The Constrained Origin of Canonical and Microcanonical Ensembles in Quantum Theory
Loris Di Cairano·Mar 12, 2026
In quantum theory, equilibrium statistical mechanics is usually formulated through the canonical ensemble, whose privileged status is tied to the Euclidean continuation of time evolution. The microcanonical ensemble, by contrast, is commonly introduc...
History state formalism for time series with application to finance
F. Lomoc, N. Canosa, A. P. Boette +1 more·Mar 12, 2026
We present a method for analyzing general time series by employing the history state formalism of quantum mechanics. This formalism allows us to describe a complete evolution based on a single quantum state, the history state, which simultaneously in...
Entanglement cost of bipartite quantum channel discrimination under positive partial transpose operations
Chengkai Zhu, Shuyu He, Gereon Koßmann +1 more·Mar 12, 2026
Quantum channel discrimination is a fundamental task in quantum information processing. In the one-shot regime, discrimination between two candidate channels is characterized by the diamond norm. Beyond this basic setting, however, many scenarios in ...
The Geometry of Clifford Algorithms: Bernstein-Vazirani as Classical Computation in a Rotated Basis
Bartosz Chmura·Mar 12, 2026
The Bernstein-Vazirani (BV) algorithm is frequently taught as a canonical example of quantum parallelism, yet the standard interference-based explanation often obscures its underlying simplicity. We present a geometric reframing in which the Hadamard...
Measurement-Induced State transitions in Inductively-Shunted Transmons
Nicholas Zobrist, John Mark Kreikebaum, Mostafa Khezri +6 more·Mar 12, 2026
Fast and high-fidelity qubit measurement plays a key role in quantum error correction. In superconducting qubits, measurement is typically performed using a resonant microwave drive on a readout resonator dispersively coupled to the qubit. Shorter me...