Papers
Live trends in quantum computing research, updated daily from arXiv.
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16,712 papers in 12 months (-57% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Improving device-independent quantum key distribution protocols through multiple routed Bell tests
Sujan Vijayaraj, Mauro Paternostro·Jun 24, 2026
Device-independent quantum key distribution (DI-QKD) offers security with the smallest possible set of assumptions about the experimental setup. The challenge posed by its implementation could be tackled using routed Bell tests with entanglement swap...
Tailor Made Embeddings for Quantum Machine Learning
Aldo Lamarre, Dominik Šafránek·Jun 24, 2026
Autoencoders transformed classical machine learning by solving the curse of dimensionality, enabling principled weight initialization and learning compact, structured representations. In this work, we extend this paradigm to quantum machine learning ...
Mechanisms governing photon-pair generation and emission directionality in quantum metasurfaces
Alberto Paniate, Ivano Ruo-Berchera, Francesco Monticone·Jun 24, 2026
Metasurfaces are emerging as a promising platform for photon-pair generation through spontaneous parametric down-conversion, thanks to their compactness, integrability, and intrinsic multifunctionality, which enables the engineering of complex quantu...
Complex frequency-dependent quadrature squeezing in semiconductor lasers
Daniele Nello, Giuseppe Patera, Lorenzo Columbo·Jun 24, 2026
We present a comprehensive study of quadrature squeezing in a quantum well laser based on a fully quantum Langevin approach. We compute the frequency-resolved squeezing map of the laser field and identify optimal squeezing curves, revealing, for the ...
The Colored Hofstadter Butterfly as a Many-Body Quantum Hall Phase Diagram
Giovanna Marcelli, Tadahiro Miyao, Domenico Monaco +2 more·Jun 24, 2026
We prove that the colored Hofstadter butterfly has a many-body interpretation for a broad class of weakly interacting lattice fermion systems. Starting from a spectral gap of a Hofstadter-like one-particle Hamiltonian at arbitrary magnetic flux $b$, ...
A Survey of Quantum Programming Languages
Quan Do, Hersh Gupta, Xiyuan Cao +5 more·Jun 24, 2026
Quantum computing has seen multiple recent breakthroughs and is getting closer to demonstrations of an exponential advantage over classical computing for certain problems. Programmers will require high-level, general-purpose, executable programming l...
Optimal observables for quantum-enhanced sensing and applications in a Floquet time crystal sensor
M. A. Manya, Andrei Tsypilnikov, Fernando Iemini·Jun 24, 2026
In this work, we discuss how to determine and implement feasible optimal observables for a metrology protocol that saturates the quantum Fisher information (QFI) bound. In particular, we focus our study on a simple protocol, namely the method of mome...
Permutation asymmetry unlocks emergent advantage in randomized Bell tests
Wieslaw Laskowski, Tamas Vertesi, Jan Wojcik·Jun 24, 2026
All maximally entangled two-qubit states violate local realism with the same probability under uniformly random projective measurements, yet they need not behave identically in randomized Bell tests. We show that when measurement settings are exchang...
Measures of Chirality in Mixed-State Topological Phases
Shijun Sun, Bader Aldossari, Rasmit Devkota +1 more·Jun 24, 2026
What does it mean for a mixed-state topological phase to be chiral? Mathematically, chirality can be sharply characterized through the symmetry algebra of the mixed state. Physically, however, the question is far more subtle. In pure states, chiralit...
A fidelity metric for quantum annealing benchmarked by extreme scaling quantum Monte-Carlo simulations
Gabriel Gouraud, Miha Srdinsek, Xavier Waintal·Jun 24, 2026
Quantum annealers are supposed to follow adiabatically the ground state of a system as its Hamiltonian slowly interpolates between a trivial phase and a non-trivial one; the non-trivial ground state being the solution to an optimization problem. Over...
Toric code made subsystem: a framework for topological subsystem codes using anticommuting quantum spin liquids
Vaibhav Sharma, Sumiran Pujari·Jun 24, 2026
We introduce a framework of constructing topological subsystem codes based on the class of anticommuting quantum spin liquids described in [Phys. Rev. B 113, 064402 (2026)]. A canonical model from this class can be considered as a spatial modificatio...
Interpretable rule-based learning in an autonomous thermodynamic network
Sparrow Suderman, Giulia Rubino·Jun 24, 2026
Machine learning is typically described in terms of deterministic logical operations, whereas physical systems generally operate in the presence of noise, dissipation and irreversibility. Here, we turn these physical effects into computational resour...
Higher Berry curvature, second Chern numbers and magnetoelectric coupling in crystalline insulators
Niclas Heinsdorf, Ken Shiozaki·Jun 24, 2026
We rewrite a lattice model of the four-dimensional Chern insulator as a family of translationally-invariant infinite chains over the three-dimensional Brillouin zone and compute its higher three-form Berry curvature using infinite matrix product stat...
Fast mixing of all-to-all quantum systems at high temperatures
Thiago Bergamaschi·Jun 24, 2026
It is shown that arbitrary quantum $k$-local Hamiltonians with bounded strength interactions admit a quantum Gibbs sampler [CKG23] with a system-size independent spectral gap, at sufficiently high temperatures. This generalizes the existing quantum f...
Simulating Universal Quantum Gate Sets on Photonic OAM Qubits: Single-Qubit and Multi-Qubit Operations via Spatial Light Modulator Phase Holography
Saleha Maqsood, Muhammad Kamran, Tahir Malik·Jun 24, 2026
Spatial light modulators (SLMs) have emerged as reconfigurable platforms for photonic quantum information processing, offering software-defined control over the orbital angular momentum (OAM) of light encoded in Laguerre-Gaussian (LG) beams. This pap...
Analytic Approach to Quantum Control Using Quantum Signal Processing
Aishwarya Majumdar, John M. Martyn, Yuan Liu +1 more·Jun 24, 2026
Realizing coherent quantum computation requires precise and robust manipulation of quantum systems through quantum control protocols. Most quantum control techniques rely on heuristic methods for designing the driving pulses that steer the system tow...
Operational detection of Wigner negativity in arbitrary quantum states from few copies
Sudip Chakrabarty, Bivas Mallick, Ananda G. Maity +1 more·Jun 24, 2026
States with negative Wigner functions form a fundamental class of nonclassical resource underlying quantum advantage. Here we develop a unified framework to detect Wigner negativity of arbitrary states using experimentally accessible moments of the W...
Folds of one curve: the superradiant phase diagram of Dicke modes with interacting matter
Max Hörmann·Jun 24, 2026
We give a thermodynamic-limit account of Dicke models with one cavity mode coupled collectively to interacting matter. Integrating out the cavity yields an exact self-consistent functional of the magnetisation $m$, $\tilde e(m) = λm^2/2 + e_{\rm mat}...
Many-Body Second Order Green's Function Theory for Ab Initio Molecular Quantum Electrodynamics
Amirhosein Amini, Jaime Cerda, Leopoldo Mejía +1 more·Jun 24, 2026
In this work, we develop two many-body quantum electrodynamic methods to calculate the ground-state energies of strongly coupled light-matter molecular systems. Specifically, we extend the second-order many-body Green's function theory (GF2) for elec...
Estimating Fidelity to a Reference Quantum State
Qisheng Wang·Jun 24, 2026
We consider the problem of estimating the fidelity of an unknown quantum state to a known reference state to within additive error $\varepsilon$. We show that the sample complexity is $O(r^2/\varepsilon^2)$ with optimal $\varepsilon$-dependence when ...