Papers
Live trends in quantum computing research, updated daily from arXiv.
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Dynamics of entanglement entropy for a locally monitored lattice gauge theory
Nisa Ara, Arpan Bhattacharyya, Nilachal Chakrabarti +2 more·Mar 31, 2026
The $1+1$ dimensional $Z_2$ gauge theory is the simplest model that allows for quantum computation or quantum simulation to probe the fundamental aspects of a gauge theory coupled with dynamical fermions. To reliably benchmark such a system, it is cr...
LLM-Guided Evolutionary Search for Algebraic T-Count Optimization
Daniil Fisher, Valentin Khrulkov, Mikhail Saygin +2 more·Mar 31, 2026
Reducing the non-Clifford cost of fault-tolerant quantum circuits is a central challenge in quantum compilation, since T gates are typically far more expensive than Clifford operations in error-corrected architectures. For Clifford+T circuits, minimi...
Weak-Field Expansion: A Time-Closed Solution of Quantum Three-Wave Mixing
Hanzhong Zhang, Avi Pe'er·Mar 31, 2026
We present a systematic derivation of the Heisenberg evolution of a trilinear bosonic Hamiltonian system in presence of a strong drive beyond the standard approximation of a classical, undepleted driving field. We employ a perturbative expansion of t...
Trotter Scars: Trotter Error Suppression in Quantum Simulation
Bozhen Zhou, Qi Zhao, Pan Zhang·Mar 31, 2026
Recent studies have shown that Trotter errors are highly initial-state dependent and that standard upper bounds often substantially overestimate them. However, the mechanism underlying anomalously small Trotter errors and a systematic route to identi...
Inverse Design of Strongly Localized Topological $π$ Modes in One-Dimensional Nonperiodic Systems
Fumitatsu Iwase·Mar 31, 2026
This study investigates the spatial confinement of topological $π$-modes in one-dimensional chiral-symmetric systems. In conventional periodic and quasiperiodic structures, edge-mode wave functions inevitably penetrate the bulk. To suppress this, inv...
Floquet Codes from Derived Semi-Regular Hyperbolic Tessellations on Orientable and Non-Orientable Surfaces
Douglas F. Copatti, Giuliano G. La Guardia, Waldir S. Soares +2 more·Mar 31, 2026
In this paper, we construct several new quantum Floquet codes on compact, orientable, as well as non-orientable surfaces. In order to obtain such codes, we identify these surfaces with hyperbolic polygons and examine hyperbolic semi-regular tessellat...
Certifying and learning local quantum Hamiltonians
Andreas Bluhm, Matthias C. Caro, Francisco Escudero Gutiérrez +4 more·Mar 31, 2026
In this work, we study the problems of certifying and learning quantum $k$-local Hamiltonians, for a constant $k$. Our main contributions are as follows: - Certification of Hamiltonians. We show that certifying a local Hamiltonian in normalized Frobe...
Topological sum rule for geometric phases of quantum gates
Nadav Orion, Boris Rotstein, Nirron Miller +1 more·Mar 31, 2026
We establish a topological sum rule, $ν_U = \frac{1}{2π}\sum_nγ_n = 2mν_H$, connecting the geometric phases accumulated by a two-qubit system over a complete basis of initial states to the winding number $ν_H$ classifying its Hamiltonian. Implementat...
Strongly Nonlinear Slow Light Polaritons in Subwavelength Modulated Waveguides
Amir Rahmani, Maciej Dems, Michał Matuszewski·Mar 31, 2026
Slow light is a regime of reduced group velocity, resulting in increased photon density in optical pulses and enhanced nonlinear effects. Here, we propose the realization of slow light in the regime of strong light-matter interaction between waveguid...
High-Order Perfect Absorption in the Absence of Exceptional Point
Huisheng Xu, Luojia Wang, Luqi Yuan +1 more·Mar 31, 2026
High-order perfect absorption of coherent input has recently attracted significant attention due to its broadband absorption capacity. However, the realization of a high-order perfect absorber relies on the exceptional point (EP) to coalesce the scat...
Nonequilibrium energy transport in driven-dissipative quantum systems
Junran Kong, Yuwei Lu, Huan Liu +2 more·Mar 31, 2026
Nonequilibrium energy transport serves as one of fundamental problems in quantum thermodynamics and quantum technologies. Driven quantum master equation in the dressed picture provides an efficient way of investigating nonequilibrium energy flow in g...
A criterion for an effective discretization of a continuous Schrödinger spectrum using a pseudostate basis
Tom Kirchner, Marko Horbatsch·Mar 31, 2026
We consider a Hamiltonian $\hat H$ with a (partially) continuous spectrum and examine the zero-overlap condition which involves the projection onto exact continuum eigenstates of a set of pseudostates obtained from the diagonalization of $\hat H$ in ...
Phase diagram of rotating Bose-Einstein condensates trapped in power-law and hard-wall potentials
G. M. Kavoulakis·Mar 31, 2026
We investigate the rotational phase diagram of a quasi-two-dimensional, weakly-interacting Bose-Einstein condensate confined in power-law and in hard-wall trapping potentials. For weak interactions, the system undergoes discontinuous transitions betw...
Optimal Control of Spin Squeezing in 2D Finite-Range Interacting Systems
Ang Li, Ling-Na Wu, Li You·Mar 31, 2026
Spin squeezing serves as both a fundamental witness of quantum entanglement and a critical resource for quantum-enhanced metrology. While generating substantial spin squeezing in finite-range interacting systems remains challenging, such capability i...
Probes of chaos over the Clifford group and approach to Haar values
Stefano Cusumano, Gianluca Esposito, Alioscia Hamma·Mar 31, 2026
Chaotic behavior of quantum systems can be characterized by the adherence of the expectation values of given probes to moments of the Haar distribution. In this work, we analyze the behavior of several probes of chaos using a technique known as Isosp...
The Manipulate-and-Observe Attack on Quantum Key Distribution
William Tighe, George Brumpton, Mark Carney +1 more·Mar 31, 2026
Quantum key distribution is often regarded as an unconditionally secure method to exchange a secret key by harnessing fundamental aspects of quantum mechanics. Despite the robustness of key exchange, classical post-processing reveals vulnerabilities ...
Non-Equilibrium Sock Dynamics: Spontaneous Symmetry Breaking in the Agitated Wash
Ahmad Darwish, Matteo Murdaca, Jami J. Kinnunen·Mar 31, 2026
It is a universal empirical observation that socks become unpaired in the laundry. We propose a quasiparticle theory of sock dynamics in which individual socks are modelled as bosonic excitations of the agitated laundry condensate. The sock dispersio...
Covariant quantum error correction in a three-layer quantum brain model: computational analysis of layer-specific coherence dynamics
Hikaru Wakaura·Mar 31, 2026
Quantum brain proposals require coherence on behaviorally relevant timescales, yet the gap between spin coherence times and neural decision windows has remained a quantitative obstacle. We evaluate approximate covariant quantum error correction (CQEC...
Entanglement in prepare-and-measure scenarios without receiver inputs
Elna Svegborn, Armin Tavakoli·Mar 31, 2026
The most elementary prepare-and-measure scenarios have no independent measurement inputs. No inputs mean that quantum advantages require two indispensable ingredients: shared entanglement and measurements that can be adapted to the communicated messa...
Quantum connectivity of quantum networks
Md Sohel Mondal, Shashank Shekhar, Siddhartha Santra·Mar 31, 2026
The practical utility of a quantum network depends on its ability to establish entanglement between arbitrary node pairs with quality sufficient to execute entanglement enabled tasks. This capability can be assessed globally, through aggregate perfor...