Quantum Brain

Papers

Live trends in quantum computing research, updated daily from arXiv.

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33,592 papers found

A unified framework for anomalous boson bunching

Léo Pioge, Leonardo Novo, Nicolas J. Cerf·Jul 21, 2026

Anomalous bunching is a paradoxical quantum interferometric phenomenon in which partially distinguishable photons exhibit a higher probability of bunching into two or more modes than fully indistinguishable photons [Nat. Photonics 17, 702 (2023)]. Wh...

Quantum Physics

Quantum resonance-enhanced performance of quantum battery

Ankita Mazumdar, Shashi C. L. Srivastava, Sanku Paul·Jul 21, 2026

Quantum resonance arising whenever the ratio of the intrinsic system frequency to the driving frequency becomes a rational number has been demonstrated to generate super-linear entanglement, enhance transport, quantum metrology performance and commun...

Quantum Physicscond-mat.stat-mechnlin.CD

Confinement Versus Screening in the Schwinger Model on AdS$_2$ from Bosonization and Tensor Networks

Sriram Bharadwaj, Jack Isen, Zhong-Bo Kang·Jul 21, 2026

We analyze confinement and screening in single-flavor quantum electrodynamics (QED$_2$) on two-dimensional anti-de Sitter space (AdS$_2$), with and without a Schwarzschild black hole, both in the continuum and on the lattice. The theory is formulated...

hep-thhep-lathep-phQuantum Physics

Quantum Synchronization

Parvinder Solanki, Albert Cabot, Fernando Iemini +8 more·Jul 21, 2026

Natural and engineered classical systems are replete with examples of synchronization, understood as the adjustment of rhythms of physical systems. Such synchronization is at the heart of the stability of several classical technologies, such as mecha...

Quantum Physicscond-mat.quant-gascond-mat.stat-mechAtomic Physics

Dark matter searches with a 13 meV threshold superconducting sensor array

Christopher Albert, Lanqing Yuan, Jacob Harris +13 more·Jul 21, 2026

Many well-motivated dark matter models predict meV-scale energy deposits in interactions with terrestrial experiments, but this regime is challenging to probe due to a lack of mature single-quantum detectors. Here we report results from QUALIPHIDE (Q...

hep-exastro-ph.IMQuantum Physics

SoK: Adversarial Robustness of the Variational Quantum Eigensolver via Red-Teaming

Ahmed Azaz Humdoon, Cheng Chu, Lei Jiang +2 more·Jul 21, 2026

The Variational Quantum Eigensolver (VQE) is a leading algorithm for estimating molecular ground-state energies on near-term quantum hardware, with applications spanning quantum chemistry, materials science, and drug discovery. As VQE workloads are i...

Quantum PhysicsCryptography

CircuitKIT : Circuit Discovery, Evaluation, and Application Toolkit for Mechanistic Interpretability

Pratinav Seth, Hem Gosalia, Aditya Kasliwal +1 more·Jul 21, 2026

Circuit analysis can support not only model explanation but also downstream interventions such as pruning, editing, steering, and selective fine-tuning. However, conducting such analyses currently requires stitching together separate implementations ...

cs.LGcs.CLEmerging Tech

Distributed Delay-Based BIST for Mixed-Signal Circuits in Flexible Electronics

Paula Carolina Lozano Duarte, Sule Ozev, Mehdi Tahoori·Jul 21, 2026

Flexible electronics (FE) based on indium gallium zinc oxide thin-film transistors (IGZO-TFTs) are emerging for ultra-low-power wearable applications. However, lack of packaging, limited pins, and high device variability make conventional Automatic T...

cs.AREmerging Tech

Perfect state transfer in Grover walks on normal Cayley graphs

Koushik Bhakta, Bikash Bhattacharjya·Jul 21, 2026

A Cayley graph $\operatorname{Cay}(Γ,S)$ over a finite group $Γ$ is said to be normal if its connection set $S$ is a union of some conjugacy classes of $Γ$. This paper investigates perfect state transfer in Grover walks on normal Cayley graphs. The G...

Quantum Physicsmath.CO

A general estimation framework for continuous-variable systems

Luca Innocenti, Simone Artini, Diana A. Chisholm +5 more·Jul 21, 2026

We show that informational completeness, while sufficient to have a bijection between ideal measurement probabilities and quantum states, does not guarantee statistically stable reconstruction from finite measurement data. To address this problem, we...

Quantum Physics

Steady States of a Single Trapped-Ion Spin Coupled to an Engineered Non-Markovian Bath

Anthony Vogliano, Lewis Hahn, Fabien Lefebvre +5 more·Jul 21, 2026

Quantum simulation of open quantum systems offers a pathway towards better understanding various non-equilibrium physics that would otherwise be challenging to study. While most open quantum systems studied are modeled as being memory-less (obeying t...

Quantum Physics

Gaussian Boson Sampling for Asset Clustering in Statistical Arbitrage Portfolios

Dayne Marcus Lopena, Daniel Buguks, Zhenghao Li +7 more·Jul 21, 2026

Gaussian Boson Sampling (GBS) provides a native photonic quantum heuristic for sampling dense subgraphs from adjacency matrices, offering a scalable physical approach to combinatorial graph search problems. Simultaneously, correlation matrix clusteri...

Quantum Physicsq-fin.CP

Efficient quantum transport in disordered Floquet networks

Hlér Kristjánsson, Jonathan Brugger, Gabriel Dufour +2 more·Jul 21, 2026

We propose a mechanism for fast and efficient quantum transport through disordered networks with variable on-site energies, inspired by photosynthetic complexes. The mechanism relies on an interplay between inter-site couplings of the network and dri...

Quantum Physicscond-mat.dis-nnphysics.bio-ph

The Limits of Quantum Computers for Power Flow

Cameron Khanpour, Samuel Talkington·Jul 21, 2026

This letter proves realistic grid properties limit the applicability of quantum computers for power flow. Grids that split into two large regions meeting at only a few buses, common in transmission networks, force the pseudo condition number of the D...

Quantum Physicseess.SY

Teleportation Game: Quantum Teleportation in Multi-Agent Systems for Interactive Music

Eduardo Reck Miranda, Scott Yeiichi Oshiro·Jul 21, 2026

This paper introduces an interactive music system with quantum musical agents that communicate by teleporting quantum states to one another. Human performers interact in real time with agents whose melodic and rhythmic behaviours are encoded as quant...

Quantum Physicscs.SD

Dynamical correlation functions of extensive charges after global quantum quenches

Riccardo Travaglino, Katja Klobas, Bruno Bertini +1 more·Jul 21, 2026

We investigate the $n$-time cumulant generating function (or $n$-Full Counting Statistics, $n$-FCS) of extensive $U(1)$ charges following a quantum quench. Exploiting space-time duality we characterise this function when evolving from initial states ...

cond-mat.stat-mechQuantum Physics

Experimental quantum cryptography with single photons and imperfect devices

Aodhán Corrigan, Koray Kaymazlar, Zhiyao Wang +9 more·Jul 21, 2026

Quantum key distribution (QKD) allows for provably secure key distribution between two trusted parties. Because the security and performance of QKD protocols rely on devices that behave according to specific assumptions, idealized or inaccurate assum...

Quantum Physics

Bound state solutions of the Schrödinger equation for the atomic systems interacting with the radial screened Coulomb potential: analytical approximation methods

Fatma Zohra Khaled, Mustafa Moumni, Mokhtar Falek·Jul 21, 2026

We investigate the bound state properties of the hydrogen-like atoms in the radial screened Coulomb potential (RSCP). using three complementary analytical approaches - expectation values with Coulomb and Kratzer reference states, variational optimiza...

Quantum Physics

Simultaneous calibration of rotation and phase errors in a single experiment

Tien D. Nguyen, Hung Q. Nguyen·Jul 21, 2026

In weakly anharmonic qubits, coherent control errors take two generic forms -- over/under-rotation and phase errors -- whose suppression normally requires iterated experiments. We show that, for any symmetric $π/2$ pulse in the weak-driving regime, b...

Quantum Physics

The Thermodynamic Geometry of Conditional Control

J. G. G. de Oliveira, M. E. R. Filippetto, T. A. B. Pinto Silva +2 more·Jul 21, 2026

Information is widely regarded as the resource underlying the thermodynamic advantages enabled by conditional control. We show, however, that informational quantities such as Holevo information and accessible distinguishability, although constraining...

Quantum Physics
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