Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Variational Quantum Eigensolver for Real-World Finance: Scalable Solutions for Dynamic Portfolio Optimization Problems
Irene De León, Danel Arias, Manuel Martín-Cordero +9 more·Dec 26, 2025
We present a scalable, hardware-aware methodology for extending the Variational Quantum Eigensolver (VQE) to large, realistic Dynamic Portfolio Optimization (DPO) problems. Building on the scaling strategy from our previous work, where we tailored a ...
Entanglement Islands and Thermodynamics of the Black Hole in Asymptotically Safe Quantum Gravity
Sobhan Kazempour, Sichun Sun, Chengye Yu·Dec 26, 2025
We study thermodynamic properties and the entanglement island of a black hole in asymptotically safe quantum gravity, analyzing key thermodynamic quantities such as the Hawking temperature, heat capacity, and entropy, as well as the mass-horizon radi...
Measure of entanglement and the monogamy relation: a topical review
Yu Guo, Zhixiang Jin·Dec 26, 2025
Characterizing entanglement, including quantifying and distribution of entanglement, which lies at heart of the quantum resource theory, have been investigated extensively ever since Bennett \etal proposed three seminal measures of entanglement in 19...
Spacetime Spins: Statistical mechanics for error correction with stabilizer circuits
Cory T. Aitchison, Benjamin Béri·Dec 26, 2025
A powerful method for analyzing quantum error-correcting codes is to map them onto classical statistical mechanics models. Such mappings have thus far mostly focused on static codes, possibly subject to repeated syndrome measurements. Recent progress...
Linear Program Witness for Network Nonlocality in Arbitrary Networks
Salome Hayes-Shuptar, Daniel Bhatti, Ana Belen Sainz +1 more·Dec 26, 2025
Network nonlocality extends Bell nonlocality to settings with multiple independent sources and parties. Certifying it in quantum information processing tasks requires suitable witnesses. However, in contrast to local correlations, the set of network-...
Double-Layered Silica-Engineered Fluorescent Nanodiamonds for Catalytic Generation and Quantum Sensing of Active Radicals
Jia Su, Zenghao Kong, Fei Kong +9 more·Dec 26, 2025
Fluorescent nanodiamonds (FNDs) hosting nitrogen-vacancy (NV) centers have attracted considerable attention for quantum sensing applications, particularly owing to notable advancements achieved in the field of weak magnetic signal detection in recent...
Zeeman-like coupling to valley degree of freedom in Si-based spin qubits
S Akbar Jafari, Hendrik J Bluhm, David P Divincenzo·Dec 26, 2025
Increasing the valley splitting in Si-based heterostructures is critical for improving the performance of semiconductor qubits. This paper demonstrates that the two low-energy conduction band valleys are not independent parabolic bands. Instead, they...
Poincaré Duality and Multiplicative Structures on Quantum Codes
Yiming Li, Zimu Li, Zi-Wen Liu +1 more·Dec 26, 2025
Quantum LDPC codes have attracted intense interest due to their advantageous properties for realizing efficient fault-tolerant quantum computing. In particular, sheaf codes represent a novel framework that encompasses all well-known good qLDPC codes ...
Logical Consistency as a Dynamical Invariant: A Quantum Model of Self-Reference and Paradox
Nikolaos Cheimarios, Spyridoula Cheimariou·Dec 26, 2025
Logical paradoxes and inconsistent information pose deep challenges in epistemology and the philosophy of logic. Classical systems typically handle contradictions only through external checks or by altering the logical framework, as in Tarski's hiera...
Evaluating Supervised Learning Approaches for Quantification of Quantum Entanglement
Shruti Aggarwal, Trasha Gupta, R. K. Agrawal +1 more·Dec 26, 2025
Quantum entanglement is a key resource in quantum computing and quantum information processing tasks. However, its quantification remains a major challenge since it cannot be directly extracted from physical observables. To address this issue, we stu...
Magic State Distillation using Asymptotically Good Codes on Qudits
Michael J. Cervia, Henry Lamm, Diyi Liu +2 more·Dec 26, 2025
Qudits offer the potential for low-overhead magic state distillation, although previous results for asymptotically good codes have required qudit dimension $q\gg 100$ or code length $\mathcal{N}\gg 100$. These parameters far exceed experimental demon...
Ergotropy in Quantum Batteries
Cheng-Jie Wang, Fu-Quan Dou·Dec 26, 2025
Ergotropy--a key figure of merit for quantum battery (QB) performance--plays a crucial role. However, the dynamics and physical mechanisms governing ergotropy evolution remain open challenges. Here, we investigate the ergotropy of a general QB model ...
A General Framework for Constructing Local Hidden-state Models to Determine the Steerability
Yanning Jia, Fenzhuo Guo, Mengyan Li +2 more·Dec 26, 2025
Not all entangled states can exhibit quantum steering, and determining whether a given entangled state is steerable is a crucial problem in quantum information theory. The main challenge lies in verifying the existence of a local hidden-state (LHS) m...
A Cohomological Framework for Topological Phases from Momentum-Space Crystallographic Groups
T. R. Liu, Zheng Zhang, Y. X. Zhao·Dec 26, 2025
Crystallographic groups are conventionally studied in real space to characterize crystal symmetries. Recent work has recognized that when these symmetries are realized projectively, momentum space inherently accommodates nonsymmorphic symmetries, the...
The Loring--Schulz-Baldes Spectral Localizer Revisited
Gregory Berkolaiko, Jacob Shapiro, Beyer Chase White·Dec 26, 2025
The spectral localizer, introduced by Loring in 2015 and Loring and Schulz-Baldes in 2017, is a method to compute the (infinite volume) topological invariant of a quantum Hamiltonian on $\ZZ^d$, as the signature of the (finite) localizer matrix. We p...
Delayed Choice Lorentz Transformations on a Qubit
Lucas Burns, Sacha Greenfield, Justin Dressel·Dec 26, 2025
A continuously monitored quantum bit (qubit) exhibits competition between unitary Hamiltonian dynamics and non-unitary measurement-collapse dynamics, which for diffusive measurements form an enlarged transformation group equivalent to the Lorentz gro...
Decoherence challenges in Nanoscience: A Quantum Phase Space perspective
Angelo Mamitiana Ralaikoto, Diary Lova Ratsimbazafy, Ravo Tokiniaina Ranaivoson +5 more·Dec 25, 2025
Quantum decoherence, the process by which a quantum system loses its coherence through interaction with an environment and becomes classical-like, represents both the fundamental mechanism for the quantum-to-classical transition and a major challenge...
Phase-space description of photon emission
D. V. Karlovets, A. A. Shchepkin, A. D. Chaikovskaia +4 more·Dec 25, 2025
Interactions between charged particles and light occur in real space and time, yet quantum field theory usually describes them in momentum space. Whereas this approach is well suited for calculating emission probabilities and cross sections, it is in...
Properties of a Three-Level $Λ$-Type Atom Driven by Coherent and Stochastic Fields
Sajad Ahmadi, Mohsen Akbari, Shahpoor Saeidian +1 more·Dec 25, 2025
We present a theoretical investigation of a three-level $Λ$-type atom driven by a strong coherent laser and a weak stochastic field exhibiting amplitude and phase fluctuations. The stochastic field is modeled as a complex Gaussian-Markovian random pr...
Quantization of Physical Interaction Strengths via Singular Moduli
Prasoon Saurabh·Dec 25, 2025
Since the 2019 redefinition of the SI units, precision metrology has sought to anchor all physical quantities to fundamental constants and integer invariants. While the optical frequency comb revolutionized timekeeping by discretizing the continuum o...