Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Climbing the Clifford Hierarchy
Luca Bastioni, Samuel Glandon, Tefjol Pllaha +2 more·Mar 12, 2026
The Clifford Hierarchy has been a central topic in quantum computation due to its strong connections with fault-tolerant quantum computation, magic state distillation, and more. Nevertheless, only sections of the hierarchy are fully understood, such ...
Operationalism, Causality, and Quantum Theory: a mostly time symmetric perspective
Lucien Hardy·Mar 12, 2026
This is a book about operational probabilistic theories. The standard approach in such theories is from a time forward perspective. In this book we mostly take a time symmetric perspective. This presents a branding problem. Is this a niche book merel...
Critical Unstable Qubits in Particle Physics
Dimitrios Karamitros, Thomas McKelvey, Snehit Panghal +1 more·Mar 12, 2026
We study in detail the dynamics of unstable two-level quantum systems by adopting the Bloch-vector representation. We identify a novel class of critical scenarios in which the so-called energy-level and decay-width vectors, ${\bf E}$ and ${\bfΓ}$, ar...
Noise Correlations as a Resource in Pauli-Twirled Circuits
Antoine Brillant, Rohan N Rajmohan, Peter Groszkowski +3 more·Mar 12, 2026
Randomized compiling (RC) is an established tool to tailor arbitrary quantum noise channels into Pauli errors. The effect of both spatial and temporal noise correlations in randomly compiled circuits, however, is not fully understood. Here, we show t...
Compactifying the Electronic Wavefunction II: Quantum Estimators for Spin-Coupled Generalized Valence Bond Wavefunctions Applied to H4
Bruna Gabrielly·Mar 12, 2026
Valence-bond-based wavefunctions, such as the spin-coupled generalized valence bond (SCGVB) ansatz, provide compact and chemically interpretable descriptions of strong correlation. However, their non-orthogonal determinant structure poses a major cha...
Engineering near-unitary one-axis twisting evolution via a driven Tavis-Cummings model
Jinfeng Liu, Yan Mu, Lili Song +2 more·Mar 12, 2026
One-axis twisting (OAT) interaction is a pivotal resource for manipulating quantum states of atomic ensembles, enabling spin squeezing, atomic-cat-state generation, and weak-phase amplification. Current implementations of OAT dynamics predominantly r...
All star-incompatible measurements can certify steering-based randomness
Shintaro Minagawa, Ravi Kunjwal·Mar 12, 2026
Certifying that quantum randomness generated by untrusted devices is unpredictable to an attacker (say, Eve) is crucial for device-independent security. Bipartite protocols where only one of the parties is trusted are termed one-sided device-independ...
Propagation of Two-Photon Zernike States in Atmospheric Turbulence
Hakob Avetisyan, Vahagn Abgaryan·Mar 12, 2026
We analyze propagation and detection of two-photon states expanded in Zernike modes through atmospheric turbulence using the extended Huygens-Fresnel formalism. For SPDC states prepared with a single Zernike pump mode, we analytically reduce the 8-di...
Quantum simulation of Liouville equation in geometrical optics with partial transmission and reflection via Schrödingerization
Shi Jin, Shuyi Zhang·Mar 12, 2026
This paper investigates quantum simulation algorithms for the Liouville equation in geometrical optics with partial transmission and reflection at sharp interfaces, based on the Schrödingerization method. By means of a warped phase transformation in ...
Approximate Reduced Lindblad Dynamics via Algebraic and Adiabatic Methods
Tommaso Grigoletto, Alain Sarlette, Francesco Ticozzi +1 more·Mar 12, 2026
We present an algebraic framework for approximate model reduction of Markovian open quantum dynamics that guarantees complete positivity and trace preservation by construction. First, we show that projecting a Lindblad generator on its center manifol...
From vacuum amplitudes to qubits
Germán Rodrigo·Mar 12, 2026
High-energy colliders, exemplified by the CERN's Large Hadron Collider (LHC), constitute genuine quantum machines. In alignment with Richard Feynman's foundational vision for quantum computing, collider physics emerge therefore as a prime candidate f...
Hybrid Analog Teleportation-Direct Transmission in Noisy Bosonic Channels
Uesli Alushi, Simone Felicetti, Roberto Di Candia·Mar 12, 2026
Quantum teleportation uses a shared entangled resource, local operations, and a digitally error-corrected classical channel to transfer quantum states between distant parties. We introduce a hybrid teleportation-direct transmission protocol for state...
Spin Model for Quantum Annealing with Kerr Parametric Oscillators
Leo Stenzel, Roeland ter Hoeven, Ryoji Miyazaki +3 more·Mar 12, 2026
Coherent states offer a promising path for near-term quantum computing due to their inherent protection against bit-flip noise. However, their large photon numbers can be challenging for numerical simulation. This paper introduces an effective model,...
Lectures on Open Quantum Systems
Marco Merkli, Ángel Neira·Mar 12, 2026
These notes are a short introduction to the mathematical theory of open quantum systems. They are meant to serve as an entry point into a broad research area which has applications across the quantum sciences dealing with systems subjected to externa...
Quantum synchronization and chimera states in a programmable quantum many-body system
Kazuya Shinjo, Kazuhiro Seki, Seiji Yunoki·Mar 12, 2026
Synchronization is a hallmark of collective behavior in classical nonlinear systems, yet its realization as a robust many-body phenomenon in coherent quantum systems remains largely unexplored. Here we demonstrate symmetry-protected quantum synchroni...
Quantum Mechanics from Finite Graded Equality
Julian G. Zilly·Mar 12, 2026
We propose that quantum mechanics follows from a single hypothesis: equality has finite resolution. Replacing the binary predicate $x = y$ with a graded distinguishability kernel $K(x,y) \in [0,1]$ forces three structural consequences: finite capacit...
Probing the memory of a superconducting qubit environment
Nicolas Gosling, Denis Bénâtre, Nicolas Zapata +8 more·Mar 12, 2026
Achieving fault tolerance with superconducting quantum processors requires qubits to operate within the regime of threshold theorems based on the Born-Markov approximation. This approximation, which models dissipation as constant energy decay into a ...
On Contextuality as a Feature of Logic and Probability Theory
Ask Ellingsen·Mar 12, 2026
In quantum mechanics, not everything that can be observed can be observed simultaneously. Observational data exhibits \emph{contextuality} -- a generalisation of nonlocality -- if the result of an observation is necessarily dependent on which combina...
Symbolic Quantum State Representation and its Simulation
Simon Sekavcnik, Janis Noetzel·Mar 12, 2026
We introduce a symbolic operator framework for simulating quantum photonic systems that works directly with the canonical commutation relations and the Weyl algebra. Unlike existing Fock-space or Gaussian simulators, our method treats temporal wave p...
Uniqueness of imaginarity-assisted transformation from computationally universal to strictly universal quantum computation
Yasuaki Nakayama, Yuki Takeuchi, Seiseki Akibue·Mar 12, 2026
The computational universality with an elementary gate set $\{H,CCZ\}$ can be transformed to the strict universality by using a maximally imaginary state $|+i\rangle$ and some non-imaginary ancillary qubits. From the viewpoint of operational resource...