Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Theory of low-weight quantum codes
Fuchuan Wei, Zhengyi Han, Austin Yubo He +2 more·Jan 27, 2026
Low check weight is practically crucial code property for fault-tolerant quantum computing, which underlies the strong interest in quantum low-density parity-check (qLDPC) codes. Here, we explore the theory of weight-constrained stabilizer codes from...
Self-Sovereign Identity and eIDAS 2.0: An Analysis of Control, Privacy, and Legal Implications
Nacereddine Sitouah, Marco Esposito, Francesco Bruschi·Jan 27, 2026
European digital identity initiatives are grounded in regulatory frameworks designed to ensure interoperability and robust, harmonized security standards. The evolution of these frameworks culminates in eIDAS 2.0, whose origins trace back to the Elec...
A Folded Surface Code Architecture for 2D Quantum Hardware
Zhu Sun, Zhenyu Cai·Jan 27, 2026
Qubit shuttling has become an indispensable ingredient for scaling leading quantum computing platforms, including semiconductor spin, neutral-atom, and trapped-ion qubits, enabling both crosstalk reduction and tighter integration of control hardware....
Enhanced quantum state discrimination under general measurements with entanglement and nonorthogonality restrictions
Swati Choudhary, Aparajita Bhattacharyya, Ujjwal Sen·Jan 27, 2026
The minimum error probability for distinguishing between two quantum states is bounded by the Helstrom limit, derived under the assumption that measurement strategies are restricted to positive operator-valued measurements. We explore scenarios in wh...
Simple broadband signal detection at the fundamental limit
Anthony M. Polloreno, Graeme Smith·Jan 27, 2026
Broadband detection of a weak oscillatory field with unknown carrier frequency underlies magnetometry, axion searches and gravitational-wave sensing. We show that the Grover-like integration-time lower bound for this task is a geometric corollary an ...
Resolving Gauge Ambiguities of the Berry Connection in Non-Hermitian Systems
Ievgen I. Arkhipov·Jan 27, 2026
Non-Hermitian systems exhibit spectral and topological phenomena absent in Hermitian physics; however, their geometric characterization is hindered by an intrinsic ambiguity rooted in the eigenspace of non-Hermitian Hamiltonians, which becomes especi...
DISCOVER: A Physics-Informed, GPU-Accelerated Symbolic Regression Framework
Udaykumar Gajera, Mohsen Sotoudeh, Kanchan Sarkar +1 more·Jan 27, 2026
Symbolic Regression (SR) enables the discovery of interpretable mathematical relationships from experimental and simulation data. These relationships are often coined descriptors which are defined as a fundamental materials property that is directly ...
Spectral Codes: A Geometric Formalism for Quantum Error Correction
Satoshi Kanno, Yoshi-aki Shimada·Jan 27, 2026
We present a new geometric perspective on quantum error correction based on spectral triples in noncommutative geometry. In this approach, quantum error correcting codes are reformulated as low energy spectral projections of Dirac type operators that...
Inter-branch message transfer on superconducting quantum processors: a multi-architecture benchmark
Cameron V. Cogburn·Jan 27, 2026
We treat inter-branch message transfer in a Wigner's-friend circuit as a practical benchmark for near-term superconducting quantum processors. Implementing Violaris' unitary message-transfer primitive, we compare performance across IBM Eagle, Nightha...
Quantum Circuit Pre-Synthesis: Learning Local Edits to Reduce $T$-count
Daniele Lizzio Bosco, Lukasz Cincio, Giuseppe Serra +1 more·Jan 27, 2026
Compiling quantum circuits into Clifford+$T$ gates is a central task for fault-tolerant quantum computing using stabilizer codes. In the near term, $T$ gates will dominate the cost of fault tolerant implementations, and any reduction in the number of...
A two-mode model for black hole evaporation and information flow
Erfan Bayenat, Babak Vakili·Jan 27, 2026
We develop and analyze a two-oscillator model for black hole evaporation in which an effective geometric degree of freedom and a representative Hawking radiation mode are described by coupled harmonic oscillators with opposite signs in their free Ham...
Quantum Light Detection with Enhanced Photonic Neural Network
Stanisław Świerczewski, Dogyun Ko, Amir Rahmani +7 more·Jan 27, 2026
Advances in quantum technologies are accelerating the demand for optical quantum state sensors that combine high precision, versatility, and scalability within a unified hardware platform. Quantum reservoir computing offers a powerful route toward th...
Optimally Driven Dressed Qubits
Alon Salhov, Sagi Nechushtan, Alex Retzker·Jan 27, 2026
The applicability and performance of qubits dressed by classical fields are limited because their control protocols give rise to an undesired counter-rotating term (CRT). This in turn forces operation in a regime where a (dressed) rotating-wave appro...
Robust topological quantum state transfer with long-range interactions in Rydberg arrays
Siri Raupach, Beatriz Olmos, Mathias B. M. Svendsen·Jan 27, 2026
We develop a theoretical framework for fast, robust and high-fidelity topological quantum state transfer in one-dimensional systems with long-range couplings, motivated by chains of Rydberg atoms with dipole-dipole interactions. Such long-range inter...
Approximate Decoherence, Recoherence and Records in Isolated Quantum Systems
Philipp Strasberg, Joseph Schindler, Jiaozi Wang +1 more·Jan 27, 2026
Using the framework of decoherent histories, we study which past events leave detectable records in isolated quantum systems under the realistic assumption that decoherence is approximate and not perfect. In the first part we establish -- asymptotica...
Orthogonally Constrained CASSCF Framework: Newton-Raphson Orbital Optimization and Nuclear Gradients
Loris Delafosse, Vincent Robert, Saad Yalouz·Jan 27, 2026
In a recent work, we introduced the foundations of an orthogonally constrained complete active space self-consistent field (OC-CASSCF) framework that produces state-specific molecular orbitals for mutually orthogonal multiconfigurational electronic s...
Transversal gates of the ((3,3,2)) qutrit code and local symmetries of the absolutely maximally entangled state of four qutrits
Ian Tan·Jan 27, 2026
We provide a proof that there exists a bijection between local unitary (LU) orbits of absolutely maximally entangled (AME) states in $(\mathbb{C}^D)^{\otimes n}$ where $n$ is even, also known as perfect tensors, and LU orbits of $((n-1,D,n/2))_D$ qua...
Efficient Application of Tensor Network Operators to Tensor Network States
Richard M. Milbradt, Shuo Sun, Christian B. Mendl +2 more·Jan 27, 2026
The performance of tensor network methods has seen constant improvements over the last few years. We add to this effort by introducing a new algorithm that efficiently applies tree tensor network operators to tree tensor network states inspired by th...
DynQ: A Dynamic Topology-Agnostic Quantum Virtual Machine via Quality-Weighted Community Detection
Shusen Liu, Pascal Jahan Elahi, Ugo Varetto·Jan 27, 2026
Quantum cloud platforms have scaled hardware capacity but not the abstraction exposed to users: small programs still monopolise entire processors, and existing Quantum Virtual Machine (QVM) designs often rely on fixed, topology-specific partitions th...
Broadcasting quantum nonlinearity in hybrid systems
Alisa D. Manukhova, Andrey A. Rakhubovsky, Radim Filip·Jan 27, 2026
Linear oscillators contribute to most branches of contemporary quantum science. They have already successfully served as quantum sensors and memories, found applications in quantum communication, and hold promise for cluster-state-based quantum compu...