quant-ph papers | Gist.Science

Error Resilience of Fracton Codes and Near Saturation of Code-Capacity Threshold in Three Dimensions

By employing statistical-mechanical mapping and large-scale Monte Carlo simulations, this study determines that the checkerboard fracton code achieves an optimal code capacity threshold of approximately 10.7%, the highest among known three-dimensional codes and nearly saturating the theoretical limit, thereby validating generalized entropy relations and confirming the high error resilience of fracton codes as quantum memories.

Giovanni Canossa, Lode Pollet, Miguel A. Martin-Delgado + 2 more2026-03-04⚛️ quant-ph

Towards a Faithful Quantumness Certification Functional for One-Dimensional Continuous-Variable Systems

This paper demonstrates that the recently proposed noise-tolerant certification functional for one-dimensional continuous-variable systems fails to detect certain known nonclassical states, prompting a generalization that improves sensitivity but still cannot faithfully certify very weakly nonclassical states, leaving the broader certification problem unresolved.

Ole Steuernagel, Ray-Kuang Lee2026-03-04⚛️ quant-ph

Extending Qubit Coherence Time via Hybrid Dynamical Decoupling

This paper proposes a hybrid dynamical decoupling approach that combines pulsed decoupling with bath spin polarization to extend the coherence time of central spins in semiconductor quantum dots by two to three orders of magnitude, thereby advancing prospects for practical quantum information processing.

Qi Yao, Jun Zhang, Wenxian Zhang + 1 more2026-03-04⚛️ quant-ph

A Hybrid Jump-Diffusion Model for Coherent Optical Control of Quantum Emitters in hBN

This paper presents a hybrid jump-diffusion stochastic model that successfully reproduces the temperature-dependent spectral diffusion and coherence degradation of quantum emitters in hexagonal boron nitride (hBN), establishing a unified phenomenological framework that links noise mechanisms to optical coherence limits and predicts a critical crossover to overdamped dynamics at approximately 25.91 K.

Saifian Farooq Bhat, Michael K. Koch, Sachin Negi + 2 more2026-03-04⚛️ quant-ph

Orders of magnitude sampling overhead reduction in quantum error mitigation

This paper introduces a virtual noise scaling framework combined with layered mitigation to achieve orders-of-magnitude reductions in sampling overhead for quantum error mitigation, effectively overcoming the runtime bottlenecks of conventional methods and making previously infeasible tasks achievable on contemporary quantum processors.

Raam Uzdin2026-03-04⚛️ quant-ph

Quantum Cellular Automata: The Group, the Space, and the Spectrum

This paper develops a theory of quantum cellular automata over arbitrary commutative rings and uses algebraic K-theory to construct a spectrum $\mathbf{Q}(X)$ that classifies these automata up to quantum circuits and stabilization, revealing a deep connection between their classification on Euclidean lattices and the K-theory of Azumaya algebras.

Mattie Ji, Bowen Yang2026-03-04⚛️ quant-ph

Symmetry and Exact Solutions of General Spin-Boson Models

This paper elucidates the symmetry structure of general spin-boson Hamiltonians to derive their exact spectra, a result that is numerically demonstrated for the two-mode case.

Yifan Sun, Lian-Ao Wu2026-03-04⚛️ quant-ph

Internal dynamics and guided motion in general relativistic quantum interferometry

This paper presents a generally covariant semi-classical framework within quantum field theory in curved spacetimes to unify and extend previous models of the coupling between internal degrees of freedom and motion in gravitational fields, predicting novel effects such as internal-energy-dependent field amplitudes and Berry-phase-inducing corrections to the Schrödinger equation.

Thomas B. Mieling2026-03-04⚛️ quant-ph

Correcting coherent quantum errors by going with the flow

This paper demonstrates that employing "lazy" passive error correction strategies, such as virtual Pauli frame updates and randomization, prevents coherent, correlated quantum errors from compounding destructively, thereby allowing logical qubit performance to match that of simpler Pauli noise models even for correlated Hamiltonian noise.

Wayne M. Witzel, Anand Ganti, Tzvetan S. Metodi2026-03-04⚛️ quant-ph

Coherent Control of Population and Quantum Coherence in Superconducting Circuits

This review article details recent breakthroughs in achieving coherent control of population distributions and optical properties in macroscopic superconducting circuits, demonstrating that quantum behaviors once thought confined to the microscopic realm can now be manipulated in large-scale systems.

Madan Mohan Mahana, Gunjan Yadav, Tarak Nath Dey2026-03-04⚛️ quant-ph

Genuine certifiable randomness from a black-box

This paper demonstrates a method for certifying genuine randomness in a black-box setting without relying on assumptions about data generation or a random seed, thereby provably preventing any deterministic adversary from successfully faking random outcomes using single particle state measurements.

Liam P. McGuinness2026-03-04⚛️ quant-ph

Rayleigh-Ritz Variational Method in The Complex Plane

This paper systematically applies the Rayleigh-Ritz variational method in the Segal-Bargmann space to quantum oscillators, rigorously establishing normalizability conditions for Gaussian trial functions and demonstrating their superior accuracy over monomial ansätze in capturing ground-state energies and anharmonic effects for both symmetric and asymmetric potentials.

M. W. AlMasri2026-03-04⚛️ quant-ph

Quantum AS-DeepOnet: Quantum Attentive Stacked DeepONet for Solving 2D Evolution Equations

This paper introduces Quantum AS-DeepOnet, a hybrid quantum-classical operator network that leverages parameterized quantum circuits and cross-subnet attention to solve 2D evolution equations with 40% fewer trainable parameters than classical DeepONet while maintaining comparable accuracy and convergence.

Hongquan Wang, Hanshu Chen, Ilia Marchevsky + 1 more2026-03-04⚛️ quant-ph

Analytic Cancellation of Interference Terms and Closed-Form 1-Mode Marginals in Canonical Boson Sampling

This paper presents a direct physical derivation of the exact 1-mode marginal distribution for Canonical Boson Sampling in $\mathcal{O}(R^2)$ time, revealing how multiphoton interference reduces to a symmetric polynomial and offering a scalable metric to distinguish quantum bunching from classical models without relying on characteristic functions or Fourier transforms.

Jiang Liu2026-03-04⚛️ quant-ph

Quantum Monte Carlo in Classical Phase Space with the Wigner-Kirkwood Commutation Function. II. Diagonal Approximation in Position Space

This paper presents a third-order expansion of the Wigner-Kirkwood commutation function approximated via a diagonal position-space method to enable Metropolis Monte Carlo simulations of liquid Lennard-Jones $^4$ He below 10 K.

Phil Attard2026-03-04⚛️ quant-ph

Quantum-Inspired Fine-Tuning for Few-Shot AIGC Detection via Phase-Structured Reparameterization

This paper proposes Q-LoRA, a quantum-inspired fine-tuning method for few-shot AIGC detection that leverages phase-aware representations and norm-constrained transformations to outperform standard LoRA, and further introduces H-LoRA, a cost-effective classical variant using the Hilbert transform that achieves comparable accuracy without quantum simulation overhead.

Kaiyang Xing, Han Fang, Zhaoyun Chen + 4 more2026-03-04⚛️ quant-ph

Quantum regression theorem in the Unruh-DeWitt battery

This paper analytically investigates an Unruh-DeWitt detector acting as a relativistic quantum battery in Rindler spacetime by employing the quantum regression theorem to derive its master equation, solve for single- and two-time correlation functions, and demonstrate how acceleration enhances spontaneous emission dissipation and shapes the emission spectrum into a Lorentzian profile.

Manjari Dutta, Arnab Mukherjee, Sunandan Gangopadhyay2026-03-04⚛️ quant-ph

Quantum Scattering of Fullerene 12C60 with Rare Gas Atoms and its selection rules for rotational quenching

This paper presents a perturbative quantum description of the scattering between 12C60 fullerene and 40Ar atoms at cryogenic temperatures, highlighting how the molecule's icosahedral symmetry dictates unusual selection rules for rotational quenching and providing calculations of its polarizability to evaluate long-range van der Waals interactions.

Alexander Petrov, Anna Linnik, Jacek Klos + 2 more2026-03-04⚛️ quant-ph

Unveiling Davydov-Split Excitons in a Template-Engineered Molecular-Graphene Heterostructure

This study demonstrates that a robust nanofabrication protocol restoring atomic-scale purity to epitaxial graphene on SiC enables the emergence of macroscopic excitonic coherence in HMTP overlayers, revealing a Davydov-split vibronic manifold where a dark excitonic branch dominates radiative relaxation via a polaron-mediated pathway.

Jan Kunc, Bohdan Morzhuk, Veronika Stará + 6 more2026-03-04⚛️ quant-ph

TIMES-ADAPT: A Quantum algorithm for real-time evolution in low-energy subspaces using fixed-depth circuits

The paper introduces TIMES-ADAPT, a variational quantum algorithm that utilizes specially trained unitaries to construct fixed-depth circuits for efficient real-time evolution of states within low-energy or symmetric subspaces of time-independent Hamiltonians, demonstrated through applications in wave packet evolution and energy transport.

Bharath Sambasivam, Kyle Sherbert, Karunya Shirali + 3 more2026-03-04⚛️ quant-ph

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