Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
The Vector and Canonical Components of the Momentum Operator in 3D Euclidean Space Spanned by General Curvilinear Coordinates
M. S. Shikakhwa·Jun 23, 2026
We construct the Hermitian vector and canonical components of the momentum operator in 3D Euclidean space spanned by general curvilinear coordinates (GCC's) using a simple, natural and unified approach based on identifying the momentum operator in an...
Electrical-Circuit Simulation of the Uhlmann Phase
Yu-Huan Huang, Yu Wang, Jia-Chen Tang +2 more·Jun 23, 2026
The Uhlmann phase extends the concept of geometric phases to mixed quantum states through a parallel-transport condition on purification amplitudes, but its experimental realization has so far required sophisticated quantum platforms with carefully e...
Offline Channel-Independent QAOA Angles for RIS Power Aggregation: Unit-Circle Phase Dictionaries and Infinite-Size Spin-Glass Limits
Burhan Gulbahar·Jun 23, 2026
Reconfigurable intelligent surfaces (RIS) maximize received power by setting per-element phases. Discrete-phase optimization is NP-hard in the worst case, while the quantum approximate optimization algorithm (QAOA) applied to RIS faces limited phase ...
No-deleting principle for two unitary copies
Dafa Li·Jun 23, 2026
Pati and Braunstein defined a deleting machine and showed the impossibility of deleting one of two identical copies of an unknown quantum state. So far, no one has defined two non-identical copies of a quantum state, of course no one has discussed th...
How rare are Markovian quantum dynamics?
Charlotte Bäcker, Nick Maryshchak, Walter T. Strunz·Jun 23, 2026
A profound understanding of decoherence and dissipation in quantum dynamics is crucial for the realistic modeling of the evolution of quantum systems. In open quantum dynamics one distinguishes between a memoryless, so-called Markovian evolution and ...
Uncovering Latent Structures in Robust Pulse Sequences: A Model-Based Reinforcement Learning Approach for Adaptable Quantum Control
Tobias Kiermeyer, Thomas Heydenreich, Léo Van Damme +3 more·Jun 23, 2026
Real-time adaptive control of quantum systems requires rapid generation of robust, high-fidelity pulses across a continuous range of operating conditions. Standard optimization algorithms such as gradient-ascent pulse engineering (GRAPE) solve each i...
Exact log-depth preparation of highly entangled matrix product states
Keisuke Murota, Frédéric Sauvage, Marco Ballarin +2 more·Jun 23, 2026
Preparing matrix product states (MPS) on a quantum device is a key subroutine in many quantum algorithms. The most competitive methods, based on the renormalisation group, prepare translationally invariant MPS of size $L$ and bond dimension $χ$, up t...
When to Skip Syndrome Extraction in Surface-GKP Codes
Vaughn Sohn, Changhun Oh·Jun 23, 2026
Fault-tolerant quantum error correction requires repeated syndrome extraction to address errors induced by the syndrome-extraction circuit itself. However, repeated syndrome extraction incurs significant overhead in terms of gate count and ancilla co...
Interaction-Enhanced Ergotropy in Phase-Driven Andreev Bound State Quantum Batteries
Disha Verma, B. Vigneshwar, R. Sankaranarayanan·Jun 23, 2026
We investigate a phase-driven quantum battery composed of two interacting Andreev bound state (ABS) units, providing a minimal superconducting platform for coherent energy storage. By analyzing the ergotropy dynamics under a superconducting phase ram...
Perfect State Transfer on Quotient Graphs in Shunt Decomposition-Based Quantum Walks
Banita Katuwal, Srinath M S, Y Lakshmi Naidu +1 more·Jun 23, 2026
This paper investigates perfect state transfer (PST) in discrete-time quantum walks constructed via the shunt decomposition method. The walks are defined on a graph $G$ and its associated quotient graph $G/π$, induced by an equitable partition $π$. T...
Free-Space CV-QKD with Single-Mode Fiber Reception: Effective Coupling Statistics and Protocol-Dependent Reference Noise
Hesham S. Ibrahim, Arnaud Coatanhay·Jun 23, 2026
We study free-space continuous-variable quantum key distribution (CV-QKD) with single-mode fiber (SMF) reception under atmospheric turbulence. The optical channel is modeled by split-step propagation through random phase screens, followed by finite-a...
On the Berry-Keating Operator
Fabio Bagarello, Sergiusz Kużel·Jun 23, 2026
We review here two different viewpoints on the Berry-Keating operator $H_{BK}$, whose connection to the Riemann hypothesis remains an intriguing and not yet fully understood question, despite considerable attention in the recent literature. In partic...
Intrinsic spectral structure of bipartite nonlocal magic resource
Xiao Huang, Guanhua Chen, Yao Yao·Jun 23, 2026
Bipartite nonlocal magic resource (BNMR) quantifies the irreducible nonstabilizerness residing in bipartite entanglement, yet its evaluation is intractable due to the full Hilbert space optimization. Here, we introduce a canonical encoding framework ...
Multipartite synchronization residuals in driven-dissipative spin networks
Jatin Ghildiyal, Shubhrangshu Dasgupta, Asoka Biswas·Jun 23, 2026
We introduce a phase-space measure of quantum synchronization that quantifies relative phase localization for two-qubit and three-qubit systems. This measure is built from the first angular moments of phase distributions obtained from Husimi-Q quasip...
Wigner's Phase Space Current for Variable Beam Splitters -- Phase Space Rotations and Newtonian Trajectories
Ole Steuernagel, Hsien-Yi Hsieh, Hua-Li Chen +1 more·Jun 23, 2026
Beam splitters allow us to superpose two continuous single mode quantum systems. To study the behaviour of beam splitters' strongly mode mixing dynamics we consider variable beam splitters acting on Wigner's phase space distribution, W , the evolutio...
Enhancing quantum-classical configuration interaction methods using a neural-network classifier
Severino Zeni, Giovanni Varutti, Jacopo Nespolo +1 more·Jun 23, 2026
Selected configuration interaction methods achieve near-exact electronic structure calculations by iteratively constructing compact variational spaces, but their efficiency depends critically on the heuristics used to identify important determinants....
Transformer-Based Language Models Across Domain Verticals: Architectures, Applications and Critical Assessment
Guruprakash J, Krithika L. B·Jun 23, 2026
Transformer-based language models have become the default substrate for natural language processing and the pace of new releases has made it hard for practitioners to separate durable ideas from the noise of incremental announcements. This review wor...
Universal Extraction of Quantum Critical Exponents and Phase Transitions via Tailored Hilbert Space
Ye Xiong·Jun 23, 2026
Finite-size scaling and the renormalization group form the central toolkit for analyzing quantum phase transitions (QPTs). In this Letter, we introduce a novel Hilbert-space tailoring scheme to probe quantum critical phenomena. Applied to the second-...
Non-adiabatic transitions in the density matrix formalism
Pasquale Di Bari, Shreya Pandit, Ye-Ling Zhou·Jun 23, 2026
We show that a density matrix formalism provides a useful description of non-adiabatic transitions in two-state quantum systems. Compared to a traditional Hamiltonian formalism, even in the absence of decoherence when there is full equivalence betwee...
Discovery of connectivity-trainability trade-off of IQP Circuits for Hamiltonian Optimization
Quoc Chuong Nguyen·Jun 23, 2026
Instantaneous Quantum Polynomial-time (IQP) circuits are promising candidates for near-term quantum advantage due to the conjectured classical hardness of their sampling task. However, their capabilities for optimization remain largely unexplored. We...