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Live trends in quantum computing research, updated daily from arXiv.
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p-Adic Dirac Equations and the Jackiw-Rebbi Model
W. A. Zúñiga-Galindo·Mar 17, 2026
We present a new p-adic version of the Jackiw-Rebbi model. In the new model, the real numeric line is replaced by a p-adic line (the field of p-adic numbers Q_{p}), and the Dirac Hamiltonian is replaced by a non-local operator acting on complex-value...
$\textit{Ab initio}$ Identification of Hydrogen Tunneling as Two-Level Systems in Nb$_2$O$_5$ and Ta$_2$O$_5$
Cristóbal Méndez, Tomás A. Arias·Mar 17, 2026
Two-level systems (TLS) in native Nb and Ta oxides limit superconducting-qubit coherence and SRF-cavity quality factors in the microwave frequency range, yet their microscopic origin remains unclear. We combine MLIP-accelerated sampling of hydrogen c...
Memory-enhanced quantum extreme learning machines for characterizing non-Markovian dynamics
Hajar Assil, Abderrahim El Allati, Gian Luca Giorgi·Mar 17, 2026
We use a Quantum Extreme Learning Machine for characterizing and estimating parameters of quantum dynamics generated by a tunable collision model. The input to the learning protocol consists of quantum states produced by successive system environment...
Optimizing Logical Mappings for Quantum Low-Density Parity Check Codes
Sayam Sethi, Sahil Khan, Maxwell Poster +2 more·Mar 17, 2026
Early demonstrations of fault tolerant quantum systems have paved the way for logical-level compilation. For fault-tolerant applications to succeed, execution must finish with a low total program error rate (i.e., a low program failure rate). In this...
Cache Hierarchy and Vectorization Analysis of Lindblad Master Equation Simulation for Near-Term Quantum Control
Rylan Malarchick·Mar 17, 2026
Simulation of open quantum systems via the Lindblad master equation is a computational bottleneck in near-term quantum control workflows, including optimal pulse engineering (GRAPE), trajectory-based robustness analysis, and feedback controller desig...
Die to wafer direct bonding of (100) single-crystal diamond thin films for quantum optoelectronics
Dominic Lepage, Amin Yaghoobi, Heidi Tremblay +1 more·Mar 17, 2026
This work unlocks the manufacturing of nanophotonic quantum systems that exploit the unique material properties of single-crystal diamond (SCD). We achieve this by introducing a semiconductor-compatible process for the direct bonding of multiple high...
From MOT to BEC using a single crossed-wire pair
Joshua M. Wilson, James A. Stickney, Francisco Fonta +4 more·Mar 17, 2026
We demonstrate a new magneto-optical trap (MOT) configuration using a simple pair of crossed wires rotated at 45 deg and an appropriate bias field to generate a MOT of >10^8 atoms. The same pair of wires, with slightly adjusted control parameters, is...
Quantum reservoir computing with classical and nonclassical states in an integrated optical circuit
S. Świerczewski, W. Verstraelen, P. Deuar +3 more·Mar 17, 2026
Quantum reservoir computing (QRC) is a hardware-implementation-friendly quantum neural network scheme with minimal physical system requirements and a proven advantage over classical counterparts. We use an extension of the positive-P phase space meth...
A quadratic Grassmann manifold optimization problem arising from quantum embedding methods
Thomas Ayral, Eric Cancès, Fabian M. Faulstich +2 more·Mar 17, 2026
This article presents a mathematical analysis and numerical strategies for solving the optimization problem of minimizing the quadratic function $J(P) = \text{Tr}(BP)- \frac{1}{2} \text{Tr}(A P A P)$, where $A,B \in \mathbb R^{M \times M}_{\rm sym}$,...
Quantifying entanglement in quantum thermodynamics via separability constraints
Joan Alba, Laura Ares, Jan Sperling +1 more·Mar 17, 2026
The role of quantum entanglement in thermodynamical systems remains elusive. Does entanglement result in thermodynamic advantages or does it impose fundamental limitations? Here, we unambiguously quantify the amount of heat and work in a quantum syst...
Generation of many-body Bell correlations with short-range interactions in analog and digital quantum simulators
Marcin Płodzień, Jan Chwedeńczuk·Mar 17, 2026
The dynamical generation of quantum resources, such as many-body entanglement or Bell correlations, can be achieved via one-axis twisting (OAT) dynamics, which require all-to-all couplings. However, current digital and analog quantum simulation platf...
Full-quantum variational dynamics simulation for time-dependent Hamiltonians with global spectral discretization
Minchen Qiao, Zi-Ming Li, Yu-xi Liu·Mar 17, 2026
The most widely used approach for simulating the dynamics of time-dependent Hamiltonians via quantum computation depends on the quantum-classical hybrid variational quantum time evolution algorithm, in which ordinary differential equations of the var...
Dissipative adaptation in a driven spin-boson model within the path-integral formalism
Elisa Iahn Goettems, Ricardo J. S. Afonso, Diogo O. Soares-Pinto +1 more·Mar 17, 2026
We investigate the dissipative adaptation hypothesis in a quantum regime using a system-reservoir approach. This hypothesis proposes that self-organization arises from a system's ability to dissipate the work transiently absorbed from an external dri...
Bell Inequalities for Smells
Ricardo Faleiro, Flavien Hirsch, Emmanuel Zambrini Cruzeiro +1 more·Mar 17, 2026
In this work, we study a particular class of Bell inequalities involving only direct equality-comparisons of outcomes. This arises naturally when outcomes are difficult to characterize. For instance, if measurements yield smells, it may be impractica...
Quantum memory precludes mixed-unitary dynamics
Charlotte Bäcker, Konstantin Beyer, Walter T. Strunz·Mar 17, 2026
Unital quantum channels, defined by their property of leaving the maximally mixed state invariant, form an important class of quantum operations. A distinguished subset of these channels can be represented as a probabilistic mixture of unitary evolut...
Tumula information and doubly minimized Petz Renyi lautum information
Lukas Schmitt, Filippo Girardi, Laura Burri·Mar 17, 2026
We study a doubly minimized variant of the lautum information - a reversed analogue of the mutual information - defined as the minimum relative entropy between any product state and a fixed bipartite quantum state; we refer to this measure as the tum...
Luttinger's Theorem Violation and Green's Function Topological Invariants in a Fractional Chern Insulator
Anton A. Markov, Andrey M. Nikishin, Nigel R. Cooper +2 more·Mar 17, 2026
Luttinger's theorem constrains the particle density of interacting fermions through global properties of the single-particle Green's function, and its violation signals a breakdown of the identification between the quantized Hall response and the Gre...
Kinematic Emergence of the Page Curve in a Local Transverse-Field Ising Model
Samuel J. W. Jones, M. Basil Altaie, Benjamin T. H. Varcoe·Mar 17, 2026
We present a controllable quantum spin-chain model that reproduces the Page curve (the rise-and-fall of bipartite entanglement expected in black-hole evaporation), using only local interactions and a kinematic reduction of the subsystem size. Two tra...
Chiral and bond-ordered phases in a triangular-ladder superconducting-qubit quantum simulator
Matthew Molinelli, Joshua C. Wang, Jeronimo G. C. Martinez +4 more·Mar 17, 2026
Many-body systems with strong interactions often exhibit macroscopic behavior markedly absent in single-particle or noninteracting limits. Such emergent phenomena are well exemplified in lattice Hubbard models, where the interplay between interaction...
Efficient Shadow Tomography of Thermal States
Chi-Fang Chen, András Gilyén·Mar 17, 2026
We present a general protocol for estimating $M$ observables from only $\mathcal{O}(\log (M)/\varepsilon^2)$ copies of a Gibbs state whose Hamiltonian is accessible. The protocol uses single-copy, nonadaptive measurements and uses a total Hamiltonian...