Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Minimality of the Pure Qubit ZX Calculus
Harry K. Stoltz, Renaud Vilmart·Aug 14, 2026
The ZX calculus is a graphical language for reasoning about quantum processes. In this paper, we develop a minimal pure-qubit ZX calculus based on the work of Vilmart [arXiv:1812.09114], Backens, Perdrix, and Wang [arXiv:1709.08903], and Stoltz [arXi...
No-Go Theorem and Routes towards Cavity-Enhanced Superconductivity
Qing-Dong Jiang·Aug 14, 2026
Recent experiments reporting cavity-vacuum-modified superconductivity raise a fundamental question: under what conditions can vacuum electromagnetic fluctuations increase a superconducting transition temperature? Starting from a Ginzburg--Landau theo...
GPU implementation of mixed quantum-classical Liouville molecular dynamics without momentum jump
Koji Ando·Aug 14, 2026
We implemented on GPU a mixed quantum-classical Liouville molecular dynamics simulation based on a momentum-jump-free theory. The trajectory spawning that was previously implemented on CPU for sampling enhancement was eliminated to avoid the overhead...
Universal aspects of bulk density of states in non-Hermitian lattices
Mykhailo Pavliuk, Askar Iliasov, Emil J. Bergholtz +1 more·Aug 14, 2026
Non-Hermitian lattice Hamiltonians generally exhibit strong boundary sensitivity, with periodic and open boundary conditions producing distinct density of states (DOS) in the complex-energy plane. This has led to the view that extended non-Hermitian ...
Measurement-Feedback Quantum Information Engine: Coherence-Transition Interference and Correlated Work Statistics
Yingying Hong, Dehua Liu, Jinfeng Wei +2 more·Aug 14, 2026
Measurement and feedback jointly prepare coherence and select finite-time dynamics in quantum information engines. Complementing a companion experimental realization, we develop a mechanism-resolved theory of the resulting work statistics and tempora...
A Fixed Universal Determinant is Variationally Complete for Continuum Fermions
Giuseppe Carleo, Riccardo Rossi·Aug 14, 2026
How many Slater determinants does an accurate variational description of interacting fermions require? Exact expansions in a finite basis need combinatorially many, and state-of-the-art fermionic neural quantum states stack growing numbers of them. W...
Current fluctuations in a non-additive open quantum system: breakdown of the quantum-jump approach
Ilia Khomchenko, Saulo V. Moreira, Emanuel Schwarzhans +2 more·Aug 14, 2026
Open quantum system dynamics is efficiently described by the quantum master equation formalism. Therein, quantum master equations in Lindblad form constitute an important subclass describing Markovian dynamics. When an open quantum system is in an ou...
To $\mathcal{PT}$ or not to $\mathcal{PT}$: Noise-induced escape and nonlinear-damping stabilization in a parity-time dimer
Richelle Jade L. Tuquero, Kilian Seibold, Oded Zilberberg·Aug 14, 2026
Parity-time ($\mathcal{PT}$) symmetric systems exhibit long-lived excitations by balancing gain and loss in coupled resonators, driving extensive theoretical interest and diverse experimental realizations. Realistic physical implementations, however,...
Angular displacement readout of a mechanical oscillator with a guided mode resonance
Diego Torres-Barajas, Oscar Angulo, Aman R. Agrawal +2 more·Aug 14, 2026
Measuring the angular displacement of a mechanical oscillator is a ubiquitous task; however, the multimode nature of angular optomechanical coupling makes coherent signal enhancement challenging. Here we demonstrate coherently enhanced angular displa...
Linearised quantum signal processing
Marek Arsenault, Hlér Kristjánsson·Aug 14, 2026
Quantum functional programming has been developed through two distinct paradigms in the last few years: Quantum Signal Processing (QSP)-based methods, including the Quantum Singular Value Transformation (QSVT), and methods based on higher-order quant...
Native multi-qubit gates on a single-junction unimon circuit
Sasu Tuohino, Mikko Möttönen, Matti Silveri·Aug 14, 2026
Quantum processors with native multi-qubit gates may offer very efficient implementations of near-term quantum algorithms on noisy hardware. Here, we introduce the multiunimon, a superconducting multimode circuit that encodes multiple qubits and enab...
Orbital Hall Effect in Weyl Semimetals from quantum geometric band interference
Chiara Pacella, Maximilian Ünzelmann, Ahmed Osman +4 more·Aug 14, 2026
Orbital angular momentum (OAM) transport in solids, prominently manifested in the orbital Hall effect, has emerged as a fundamental phenomenon that can decisively exceed its spin-based counterparts. However, the microscopic mechanisms governing OAM d...
Analytical Theory of Higher-Order Collective Spin Interactions in Cavity Quantum Electrodynamics
Leilani Ainsworth, Chase Gomes, Joseph Prescott +5 more·Aug 14, 2026
Cavity-mediated collective-spin interactions are commonly described by a quadratic one-axis twisting Hamiltonian. However, the underlying atom-light interaction naturally generates nonlinearities to arbitrary order. Here, we derive a closed-form anal...
Equivalence Between Average-Case Hardness of Learning and Cryptography for Mixed Quantum States
Alexandru Cojocaru, Laura Lewis·Aug 14, 2026
The relationship between cryptography and learning theory has long been a central theme in the foundations of theoretical computer science: cryptographic primitives can imply hardness of learning, while hardness of learning can in turn be used to con...
Quantum Snapshots Reveal a Compact Conformal Boundary Mode
M. A. Rajabpour·Aug 14, 2026
A projective measurement of a many-body state produces a microscopic snapshot, usually viewed as random classical data. We show that partial occupation snapshots of the critical XX chain contain a universal angle with a precise conformal meaning. Div...
Krylov complexity and Berry phase in quantum adiabatic dynamics
Han-Qi Zheng, Peng-Zhang He, Lei-Hua Liu +1 more·Aug 14, 2026
The connection between Krylov complexity and Berry phase in adiabatic dynamics is investigated under the instantaneous eigenstate basis of a slowly evolving spin system. Adiabatic dynamics force the Krylov complexity to vanish if the initial Krylov b...
Quantum Multi-Armed Bandits and Linear Bandits: Lower Bounds and Algorithms
Maoli Liu, Zhuohua Li, John C. S. Lui·Aug 14, 2026
We study quantum multi-armed bandits (QMAB) and quantum linear bandits (QLB) in the model of Wan et al. [2023], where the learner queries each arm or action through a quantum reward oracle or its inverse. Prior work gives algorithms over horizon $T$ ...
Entanglement spectrum ordering and flavor polarization in the two-flavor Schwinger model at vacuum angle $θ= π$
Boliang Yu, Ruixin Zhou, Meisen Gao·Aug 14, 2026
Entanglement spectra in gauge theories can encode both symmetry breaking and the organization of gauge sectors. In the two-flavor Schwinger model at vacuum angle $θ=π$, we find that the joint Schmidt distribution $p_{Q_A,F_A}$, labeled by the subsyst...
Qu-Trefoil: Large-Scale Quantum Circuit Simulator Working on FPGA With SATA Storages
Kaijie Wei, Hideharu Amano, Ryohei Niwase +2 more·Aug 14, 2026
Quantum circuits are fundamental components of quantum computing, and state-vector-based quantum circuit simulation is a widely used technique for tracking qubit behavior throughout circuit evolution. However, simulating a circuit with $n$ qubits req...
SymQuPS: Symbolic Quantum Phase Space Algebra in Python
Hendry M. Lim, Donny Dwiputra, Ahmad R. T. Nugraha·Aug 14, 2026
We present \texttt{SymQuPS}, a SymPy-based algebra system in Python mainly aimed toward the phase space representation of quantum mechanics within the Cahill-Glauber formalism (including the Glauber-Sudarshan $P$, Wigner, and Husimi $Q$ representatio...