Papers
Live trends in quantum computing research, updated daily from arXiv.
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Interaction-Conditional Semantics and the Dissolution of Quantum Paradoxes
Jonathon Sendall·Jan 20, 2026
This paper argues that several canonical puzzles in quantum mechanics, including spin measurement, the double slit, entanglement correlations, and Wigner's friend, share a common origin in a semantic error and the illicit promotion of interaction con...
Symmetric Informationally Complete Positive Operator Valued Measure and Zauner conjecture
Stefan Joka·Jan 20, 2026
In this paper, we show that in Hilbert space of any finite dimension N, there are N^2 unit vectors which constitute Symmetric Informationally Complete Positive Operator Valued Measure (SIC-POVM).
Quantum Encoding Framework for Leptophilic Gauge Theories
S. Kara·Jan 20, 2026
We present a systematic quantum encoding framework for leptophilic extensions of the Standard Model, tailored to quantum simulation applications on near term and future quantum devices. Focusing on anomaly free $U(1)'_{\ell}$ gauge theories, we show ...
AQUA: an Agile Process to Develop Quantum Annealing Applications
Lodovica Marchesi, Amal Nasharti, Michele Marchesi·Jan 20, 2026
Quadratic unconstrained binary optimization (QUBO) is a field of operations research that is attracting growing interest due to the recent availability of quantum hardware targeted at solving QUBO problems. However, practical adoption is hindered by ...
Quantum Entanglement, Stratified Spaces, and Topological Matter: Towards an Entanglement-Sensitive Langlands Correspondence
Kazuki Ikeda, Steven Rayan·Jan 19, 2026
Recently, quantum entanglement has been presented as a cohomological obstruction to reconstructing a global quantum state from locally compatible information, where sheafification provides a functor that is forgetful with regards to global-from-local...
Quantum Qualifiers for Neural Network Model Selection in Hadronic Physics
Brandon B. Le, D. Keller·Jan 19, 2026
As quantum machine-learning architectures mature, a central challenge is no longer their construction, but identifying the regimes in which they offer practical advantages over classical approaches. In this work, we introduce a framework for addressi...
High-Resolution Electron Paramagnetic Resonance
Colin J. Stephen, Anton Tcholakov, Maik Icker +7 more·Jan 19, 2026
Electron paramagnetic resonance (EPR) is a valuable tool for physics, chemistry, biology and medicine, providing complementary spectroscopic information to NMR. It has long been known that EPR at high magnetic fields offers greater spectral resolutio...
Efficient and compact quantum network node based on a parabolic mirror on an optical chip
A. Safari, E. Oh, P. Huft +3 more·Jan 19, 2026
We demonstrate a neutral atom networking node that combines high photon collection efficiency with high atom photon entanglement fidelity in a compact, fiber integrated platform. A parabolic mirror is used both to form the trap and to collect fluores...
Precise estimation of the coupling strength between two nanomechanical modes from four Ramsey fringes
Anh Tuan Le, Avishek Chowdhury, Hugo Ribeiro +1 more·Jan 19, 2026
We experimentally determine the coupling strength between two strongly coupled nanomechanical modes using a Ramsey-inspired technique optimized for signals as short as four fringes. The method is applied to precisely probe the change of the coupling ...
High Field Diamond Magnetometry Towards Tokamak Diagnostics
S. M. Graham, C. J. Stephen, A. J. Newman +3 more·Jan 19, 2026
Nitrogen vacancy centres (NVC) in diamond have been widely used for near-dc magnetometry. The intrinsic properties of diamonds make them potential candidates for tokamak fusion power diagnostics, where radiation-hard magnetometers will be essential f...
Type-I and Type-II Fusion Protocols for Weighted Graph States
N. Rimock, Y. Oz·Jan 19, 2026
Weighted graph states extend standard graph states by associating phases with entangling edges, and may serve as resources for measurement-based quantum computation (MBQC). We analyze how the two main fusion operations, Type-I and Type-II, act on wei...
Loopless multiterminal quantum circuits at odd parity
Antonio Manesco, Anton Akhmerov, Valla Fatemi·Jan 19, 2026
We theoretically investigate loopless multiterminal hybrid superconducting devices at odd fermion parity with time-reversal symmetry. We find that the energy-phase relationship has a double minimum corresponding to opposite windings of the supercondu...
Stochastic resetting induces quantum non-Markovianity
Federico Carollo, Sascha Wald·Jan 19, 2026
Stochastic resetting describes dynamics which are reinitialized to a reference state at random times. These protocols are attracting significant interest: they can stabilize nonequilibrium stationary states, generate correlations in noninteracting sy...
Inferring rotations using a bosonic Josephson junction
Rhombik Roy, Ofir E. Alon·Jan 19, 2026
Rotation and quantum tunneling are fundamental concepts in physics, and their interplay in the ultracold atomic systems is of particular interest. In this theoretical work, we explore how tunneling dynamics in a bosonic Josephson junction are modifie...
Polynomial-time certification of fidelity for many-body mixed states and mixed-state universality classes
Yuhan Liu, Yijian Zou·Jan 19, 2026
Computation of Uhlmann fidelity between many-body mixed states generally involves full diagonalization of exponentially large matrices. In this work, we introduce a polynomial-time algorithm to compute certified lower and upper bounds for the fidelit...
Quantum Circuit Pruning: Improving Fidelity via Compilation-Aware Circuit Approximation
Pau Escofet, Santiago Rodrigo, Rohit Sarma Sarkar +3 more·Jan 19, 2026
This work presents a routing-aware pruning strategy for quantum circuits executed on Noisy Intermediate-Scale Quantum (NISQ) devices. We propose a method to remove parametric controlled rotations whose small rotation angles do not justify the routing...
Two-Point Stabilizer Rényi Entropy: a Computable Magic Proxy of Interacting Fermions
Jun Qi Fang, Fo-Hong Wang, Xiao Yan Xu·Jan 19, 2026
Quantifying non-stabilizerness (``magic'') in interacting fermionic systems remains a formidable challenge, particularly for extracting high order correlations from quantum Monte Carlo simulations. In this Letter, we establish the two-point stabilize...
Synthesis of Fault-tolerant State Preparation Circuits using Steane-type Error Detection
Erik Weilandt, Tom Peham, Robert Wille·Jan 19, 2026
Fault-tolerant state preparation is essential for reliable quantum error correction, particularly in Steane-type error correction, which relies on robust ancilla states for syndrome readout. One method of fault-tolerant state preparation is to initia...
The table maker's quantum search
Stefanos Kourtis·Jan 19, 2026
We show that quantum search can be used to compute the hardness to round an elementary function, that is, to determine the minimum working precision required to compute the values of an elementary function correctly rounded to a target precision of $...
Quantum eigenvalues and eigenfunctions of an electron confined between conducting planes
Don MacMillen·Jan 19, 2026
Two of the most iconic systems of quantum physics are the particle in a box and the Coulomb potential (the third is, of course, the harmonic oscillator). In this expository paper, we consider the quantum solution to the problem of an electron confine...