Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Bound states in a semi-infinite square potential well
Nivaldo A. Lemos·Mar 9, 2026
The finite square potential well is a staple problem in introductory quantum mechanics. There is an extensive literature on the determination of the allowed energies, which requires the solution of a transcendental equation by numerical, graphical or...
Dynamical Lie algebras generated by Pauli strings and quadratic spaces over $\mathbb{F}_2$
Hans Cuypers·Mar 9, 2026
Dynamical Lie algebras, i.e. Lie subalgebras of $\mathfrak{su}(2^n)$, generated by Pauli strings have recently been studied intensively. They are also called Pauli Lie algebras or Hamiltonian Lie algebras. In this paper we provide a uniform mathemati...
Bound Trions in Two-Dimensional Monolayers: A Review
Roman Ya. Kezerashvili·Mar 9, 2026
Trions -- Coulomb-bound three-particle excitations composed of two like-charge carriers and one oppositely charged carrier -- are central quasiparticles in two-dimensional semiconductors. Reduced dielectric screening and quantum confinement strongly ...
A Realistic Framework for Quantum Sensing under Finite Resources
Zdeněk Hradil, Jaroslav Řeháček·Mar 9, 2026
Quantum-enhanced sensing is commonly benchmarked using the quantum Fisher information (QFI), often interpreted as a direct indicator of achievable precision. However, this quantity acquires operational meaning only within a fully specified inference ...
Construction of a Family of Quantum Codes Using Sub-exceding Functions via the Hypergraph Product and the Generalized Shor Construction
Luc Rabefihavanana, Harinaivo Andriatahiny, Randriamiarampanahy Ferdinand·Mar 9, 2026
In this paper, we introduce a new family of stabilizer quantum LDPC codes derived from the classical linear codes $L_k$ and $L_k^{+}$, defined via sub-exceding functions. In previous work, these codes demonstrated strong performance in minimum distan...
A Bipartite Quantum Key Distribution Protocol Based on Indefinite Causal Order
Mateusz Leśniak, Ryszard Kukulski, Paulina Lewandowska +2 more·Mar 9, 2026
We propose a bipartite quantum key distribution (QKD) protocol based on causal nonseparability: the presence of a resource -- a process matrix -- that does not correspond to any definite causal order between two parties. In our protocol, Alice and Bo...
Simulating non-Markovian open quantum dynamics by exploiting physics-informed neural network
Long Cao, Liwei Ge, Daochi Zhang +4 more·Mar 9, 2026
This work integrates the physics-informed neural network (PINN) approach into the neural quantum state framework to simulate open quantum system dynamics, to circumvent the computationally expensive time-dependent variational principle required in co...
Practical implementation of arbitrary nonlocal controlled-unitary gate via indefinite causal order
Wen-Qiang Liu, Zi-Han Zheng, Zhang-Qi Yin +1 more·Mar 9, 2026
Quantum gate teleportation enables the implementation of nonlocal quantum operations without direct interactions between distant nodes. We propose an efficient protocol for implementing arbitrary controlled-unitary (CU) gates acting on two spatially ...
Classically Driven Hybrid Quantum Algorithms with Sequential Givens Rotations for Reduced Measurement Cost
Benjamin Mokhtar, Noboru Inoue, Takashi Tsuchimochi·Mar 9, 2026
Quantum algorithms for electronic-structure simulations are actively being developed, yet many hybrid quantum-classical approaches are bottlenecked by the measurement overhead associated with large molecular Hamiltonians. Here we introduce a diagonal...
Perturbative relativistic modifications to wave-packet dynamics and uncertainty relations in the quantum harmonic oscillator
Jian Carlo Ramos, Sujoy K. Modak·Mar 9, 2026
We analyze relativistic corrections to the wave-packet dynamics of the quantum harmonic oscillator within a perturbative framework. General expressions are derived for the leading-order relativistic contributions to the wave-packet parameters such as...
Lattice: A Post-Quantum Settlement Layer
David Alejandro Trejo Pizzo·Mar 9, 2026
We present Lattice (L, ticker: LAT), a peer-to-peer electronic cash system designed as a post-quantum settlement layer for the era of quantum computing. Lattice combines three independent defense vectors: hardware resilience through RandomX CPU-only ...
Visualization of Three-Qubit Pure States with Separation of Local and Nonlocal Degrees of Freedom
Satoru Shoji·Mar 9, 2026
Understanding the structure of multi-qubit quantum states is essential for both quantum information research and education, yet intuitive visualization beyond the single-qubit Bloch sphere remains challenging. In this work, we propose a unified geome...
Quantum information advantage based on Bell inequalities
Rahul Jain, Srijita Kundu·Mar 9, 2026
Recently, Kretschmer et al. [KGD+25] presented an experimental demonstration of a proposed quantum information advantage protocol. We present an alternate proposal based on a relation derived from parallel-repeated CHSH games. Our memory measure is b...
Symmetric Trotterization in digital quantum simulation of quantum spin dynamics
Yeonghun Lee·Mar 9, 2026
A higher-order Suzuki-Trotter decomposition or Trotterization can be exploited to mitigate the Trotter error in digital quantum simulation. This work revisits the second-order symmetric Trotterization in terms of the Trotter error, where quantum many...
Formally Verifying Quantum Phase Estimation Circuits with 1,000+ Qubits
Arun Govindankutty, Sudarshan K. Srinivasan·Mar 9, 2026
We present a scalable formal verification methodology for Quantum Phase Estimation (QPE) circuits. Our approach uses a symbolic qubit abstraction based on quantifier-free bit-vector logic, capturing key quantum phenomena, including superposition, rot...
The Dirac sea of phase: Unifying phase paradoxes and Talbot revivals in multimode waveguides
N. Korneev, I. Ramos-Prieto, H. M. Moya-Cessa·Mar 9, 2026
The quantum mechanical description of phase remains a fundamental challenge, with theoretical efforts tracing from the early works of London and Dirac to discrete formalisms. In this work, we extend the action-angle formalism to the Helmholtz-Schrödi...
A Note on the Equivalence Between Zero-knowledge and Quantum CSS Codes
Noga Ron-Zewi, Mor Weiss·Mar 9, 2026
Zero-knowledge codes, introduced by Decatur, Goldreich, and Ron (ePrint 1997), are error-correcting codes in which few codeword symbols reveal no information about the encoded message, and have been extensively used in cryptographic constructions. Qu...
Four-state discrimination for a pair of spin qubits via gate reflectometry
Aritra Sen, András Pályi·Mar 8, 2026
Single-electron spin qubits defined in quantum dots are used as building blocks of a semiconductor-based quantum computer. Readout in a scaled-up version of such a quantum computer is expected to rely on the Pauli Spin Blockade (PSB) mechanism. A des...
Lindbladian Learning with Neural Differential Equations
Timothy Heightman, Roman Aseguinolaza Gallo, Edward Jiang +3 more·Mar 8, 2026
Inferring the dynamical generator of a many-body quantum system from measurement data is essential for the verification, calibration, and control of quantum processors. When the system is open, this task becomes considerably harder than in the purely...
Entanglement Fidelity in Standard Quantum Channels
Niccolò Zanieri, Marios Kountouris·Mar 8, 2026
Entanglement fidelity quantifies how well a quantum channel preserves the correlations between a transmitted system and an inaccessible reference system. We derive closed-form expressions for the entanglement fidelity associated with several standard...