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Live trends in quantum computing research, updated daily from arXiv.
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Lean-Quantum: Toward AI-Assisted Formalization of Quantum Information
Kazumi Kasaura, Kei Tsukamoto, Kento Mori +6 more·Jul 6, 2026
Quantum information theory is built on entropic quantities; among them, the sandwiched Rényi relative entropy is a fundamental divergence with various applications, and its data processing inequality (DPI) under quantum channels is a cornerstone resu...
Logical Spectroscopy: Lifted-Product Codes with Addressable Bases
Jong Yeon Lee·Jul 6, 2026
Quantum LDPC memories can encode many logical qubits, but that alone does not make them usable: applications need to know where the logical operators are supported, how they are labeled, and how conjugate $X/Z$ partners pair. For hypergraph-product c...
Charge-Sector Construction of the Type-IIB Axion--Dilaton Wormhole Partition Function
Soo-Jong Rey·Jul 6, 2026
I construct the Type-IIB axion--dilaton wormhole partition function from charge-sector data. In a chosen axion charge, equivalently form-field flux sector, the long-distance saddle calculation supplies a two-end operator term with coefficient matrix ...
Coherent Control of Energy Transport at Room Temperature in a Noisy Bath
Davinder Singh, Paul Brumer·Jul 6, 2026
Coherent control of energy transport in a non-equilibrium steady-state (NESS) in a reaction-center-connected donor-acceptor pair is proposed. The pigments are considered to be continuously interacting with incoherent radiation and a phonon bath while...
Faithfulness to Refusal: A Causal Audit of Neuron Selectors
Ananth Eswar, Pratinav Seth, Utsav Avaiya +1 more·Jul 6, 2026
Attribution scores increasingly identify which neuron rows of a language model matter for applications such as pruning, interpretability, and editing for safety, yet whether they identify causally important rows is rarely tested directly. We address ...
Quantum Computational Resources and Conformal Field Theory: Unifying Spins, Bosons, and Fermions
Ryota Matsuda, Masahiro Hoshino, Yuto Ashida·Jul 6, 2026
Characterizing a quantum state through the lens of quantum resources provides an information-theoretic perspective on many-body systems. While quantum entanglement serves as the paradigmatic example of a quantum resource, recent studies have shown th...
Quantum Spectral Anomaly Detection
Yewei Yuan, Michele Minervini, Mark M. Wilde +1 more·Jul 6, 2026
A core task in quantum anomaly detection is to compute an anomaly score that quantifies how strongly a test quantum state deviates from a given quantum dataset assumed to be normal. Classically, principal component analysis (PCA) for centered data co...
Polynomial Initial-State Jumps and Christoffel Transforms in Krylov Complexity
Abhishek Chowdhury, Ajit Prasad Mahapatra·Jul 6, 2026
At fixed Hamiltonian $H$, changing the initial state changes the cyclic pair and hence generally the Lanczos basis and spread. For every normalizable polynomial preparation $\lvertψ_Q\rangle=N_Q^{-1/2}Q(H)\lvert K_0\rangle$, we reconstruct its state-...
Routing Anonymity and Identifiability of Noisy Quantum Hardware
Ben Priestley, Mina Doosti·Jul 6, 2026
Present-day quantum computing is cloud-based, where a user submits a circuit to a service provider's proprietary backend hardware. While providers may wish to hide implementation details, scheduling choices, or even which physical device was used, no...
Excitation spectra and rank tomography of linear matrix product tangent spaces
Otto T. P. Schmidt, Iacopo Carusotto·Jul 6, 2026
We formulate a tangent-space method for algebraic varieties of matrix product states (MPS) to study excitation spectra of non-uniform quantum many-body systems with open boundary conditions. We further introduce a rank tomography of the MPS tangent s...
Optimizing ML Workload Partitioning between CPUs and CIM Accelerators for Heterogeneous Computing
Joel Klein, Rebecca Pelke, Roberto Laudani +2 more·Jul 6, 2026
Computing-in-Memory (CIM) accelerators execute Matrix-Vector Multiplications (MVMs) in memory, making them a compelling solution for Machine Learning (ML) workloads. However, existing ML workload partitioning approaches for CIM accelerators do not fu...
Quasi-holonomy in non-adiabatic quantum evolution
Erik Sjöqvist, Adam Fredriksson·Jul 6, 2026
We develop a framework for quasi-holonomy in non-adiabatic quantum time evolution of subspaces along loops in a complex Grassmannian. By factoring the Schrödinger evolution into dynamical and connection-induced contributions in a moving basis, we obt...
Fast Pulses for High-Fidelity Circularization of Interacting Rydberg atoms
Matthias Hüls, Aurore A. Young, Clément Sayrin +6 more·Jul 6, 2026
Circular states in Rydberg atoms offer a promising platform for quantum computation, quantum simulation and quantum sensing. However, the final step of their preparation - termed as circularization, a process that involves the transfer of a large amo...
Optimal Base Station Placement for Beyond 5G Networks with Non-Convex Topology
Mohamed Shalma, Amr Mansour, Ahmed El-Mahdy·Jul 6, 2026
This paper investigates the optimal placement of a millimeter-wave (mmWave) base station (BS) within a realistic U-shaped environment with non-convex topology. The problem is challenging and NP-hard due to the non-convex topology and the non-convex o...
Integral representations of $f$-divergences for general von Neumann algebras
Ricardo Correa da Silva, Markus B. Fröb, Gandalf Lechner +1 more·Jul 6, 2026
We define and analyze hockeystick divergences and $f$-divergences for normal positive functionals on general von Neumann algebras, generalizing and unifying previous work in classical probability and finite-dimensional von Neumann algebras. All the m...
Spectral-topology-induced criticality in non-Hermitian fermionic metals
Ayan Banerjee, Julius T. Gohsrich, Flore K. Kunst·Jul 6, 2026
Quantum matter emerges from the interplay of fluctuations, topology, and entanglement, which - in equilibrium - governs quantized transport, universal criticality, and topological classification. Non-Hermitian systems, widely explored in platforms ra...
Efficient classical simulation of two-dimensional long-range systems: Rydberg arrays and beyond
Jia-Lin Chan, Tao Xiang, Yantao Wu·Jul 6, 2026
In variational Monte Carlo (VMC) calculations of $N$-site quantum systems with arbitrary all-to-all two-body interactions, evaluating the local energy generally costs $O(N^3)$. We introduce a new framework that reduces this cost to $O(N)$ for tensor ...
Fragile single-cone Dirac quantum walks in two dimensions
C. W. J. Beenakker, J. Sánchez Férnan, J. Tworzydło·Jul 6, 2026
It is known that a one-dimensional (1D) quantum walk gives a local space-time discretization of the massless Dirac equation with a single quasi-energy cone (no fermion doubling at low energies), keeping the fundamental symmetries (chiral and time-rev...
Characterisation of a satellite-to-ground channel for continuous variable quantum key distribution protocol
Emma Tien Hwai Medlock, Vinod N. Rao, Timothy P. Spiller +1 more·Jul 6, 2026
In space based quantum key distribution (QKD) protocols, the quantum channel will be dynamic in nature and the channel loss will change with respect to the zenith angle. In the context of continuous variable (CV)-QKD, this will cause issues with para...
Complementary 3D color codes for transversal quantum logic
Friederike Butt, Luis Colmenarez, Erik Weilandt +3 more·Jul 6, 2026
Transversal logical gates provide a direct route to fault-tolerant quantum computation, but the Eastin-Knill theorem forbids a universal transversal gate set within a single quantum error-correcting code. We propose a hybrid architecture based on the...