Quantum Brain

Papers

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

Total Papers

28,250

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22

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Research Volume

13,405 papers in 12 months (-22% vs prior quarter)

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28,250 papers found

Fermionic versus Spin Baths in non-Interacting Transport Models

Muhammad Zia, Moritz Cygorek, Erik M. Gauger +1 more·Oct 7, 2025

We investigate how fermionic anticommutation shapes transport in a noninteracting resonant-level model where a single central site is coupled to an environment. To this end, we compare a fermionic reservoir with a bath of spin-half modes using exact ...

Quantum PhysicsMesoscale Physics

Angular--Momentum--Resolved Aharonov--Bohm Coupling Energy

Ju Gao, Fang Shen·Oct 7, 2025

We present an angular--momentum--resolved energetic formulation of the Aharonov--Bohm (AB) response for a confined Dirac electron based on two gauge--invariant interaction functionals: a magnetization--field functional and a current--potential functi...

Quantum Physics

Hybrid Quantum-Classical Policy Gradient for Adaptive Control of Cyber-Physical Systems: A Comparative Study of VQC vs. MLP

Aueaphum Aueawatthanaphisut, Nyi Wunna Tun·Oct 7, 2025

The comparative evaluation between classical and quantum reinforcement learning (QRL) paradigms was conducted to investigate their convergence behavior, robustness under observational noise, and computational efficiency in a benchmark control environ...

Quantum PhysicsAIcs.LGcs.RO

Extended validations on photon number resolving detector based Gaussian boson sampling with low noises

Yang Ji, Yongzheng Wu, Shi Wang +3 more·Oct 7, 2025

Gaussian boson sampling (GBS) is a variety of boson sampling overcoming the stable single-photon preparation difficulty of the later. However, like those in the original version, noises in GBS will also result in the deviation of output patterns and ...

Quantum Physics

Robust Non-Adiabatic Holonomic Gating in Qutrits via Inverse-Engineered Pulse Shaping and Error Compensation

Jie Lu, Jie-Dong Huang, Yang Qian +3 more·Oct 7, 2025

Systematic control errors, specifically Rabi frequency fluctuations and frequency detuning, constitute a primary bottleneck for high-fidelity quantum gates across leading platforms. In this work, we present a robust pulse engineering framework for no...

Quantum Physics

Hybrid quantum-classical analog simulation of two-dimensional Fermi-Hubbard models with neutral atoms

Sergi Julià-Farré, Antoine Michel, Christophe Domain +11 more·Oct 7, 2025

We experimentally study the two-dimensional Fermi-Hubbard model using a Rydberg-based quantum processing unit in the analog mode. Our approach avoids encoding directly the original fermions into qubits and instead relies on reformulating the original...

Quantum Physicscond-mat.quant-gascond-mat.str-el

Learning stabilizer structure of quantum states

Srinivasan Arunachalam, Arkopal Dutt·Oct 7, 2025

We consider the task of learning a structured stabilizer decomposition of an arbitrary $n$-qubit quantum state $|ψ\rangle$: for $ε> 0$, output a state $|φ\rangle$ with stabilizer-rank $\textsf{poly}(1/ε)$ such that $|ψ\rangle=|φ\rangle+|φ'\rangle$ wh...

Quantum PhysicsComplexitymath.CO

Full Eigenstate Thermalization in Integrable Spin Systems

Tanay Pathak·Oct 7, 2025

The Eigenstate Thermalization Hypothesis(ETH) is a standard tool to understand the thermalization properties of an isolated quantum system. Its generalization to higher order correlations of matrix elements of local operators, dubbed the full ETH, pr...

cond-mat.stat-mechhep-thQuantum Physics

Entanglement dynamics and performance of two-qubit gates for superconducting qubits under non-Markovian effects

Kiyoto Nakamura, Joachim Ankerhold·Oct 7, 2025

Within a numerically exact simulation technique, the dissipative dynamics of a two-qubit architecture is considered in which each qubit couples to its individual noise source (reservoir). The goal is to reveal the role of subtle qubit-reservoir corre...

Quantum Physics

Dynamic Scheduling in Fiber and Spaceborne Quantum Repeater Networks

Paolo Fittipaldi·Oct 7, 2025

The problem of scheduling in quantum networks amounts to choosing which entanglement swapping operations to perform to better serve user demand. The choice can be carried out following a variety of criteria (e.g. ensuring all users are served equally...

Quantum Physicscs.NI

Hayden--Preskill Model via Local Quenches

Weibo Mao, Tadashi Takayanagi·Oct 7, 2025

We model the Hayden--Preskill (HP) information recovery protocol in 2d CFTs via local joining quenches. Euclidean path integrals with slits prepare the HP subsystems: the message $M$, its reference $N$, the Page-time black hole $B$, the early radiati...

hep-thcond-mat.str-elQuantum Physics

Hybrid Sequential Quantum Computing

Pranav Chandarana, Sebastián V. Romero, Alejandro Gomez Cadavid +3 more·Oct 7, 2025

We introduce hybrid sequential quantum computing (HSQC), a paradigm for combinatorial optimization that systematically integrates classical and quantum methods within a structured, stage-wise workflow. HSQC may involve an arbitrary sequence of classi...

Quantum Physics

Optimal ancilla-free Clifford+T synthesis for general single-qubit unitaries

Hayata Morisaki, Kaoru Sano, Seiseki Akibue·Oct 7, 2025

We propose two Clifford+$T$ synthesis algorithms that are optimal with respect to $T$-count. The first algorithm, called deterministic synthesis, approximates any single-qubit unitary by a single-qubit Clifford+$T$ circuit with the minimum $T$-count....

Quantum Physicsmath.NT

Efficient Post-Selection for General Quantum LDPC Codes

Seok-Hyung Lee, Lucas H. English, Stephen D. Bartlett·Oct 7, 2025

Post-selection strategies that discard low-confidence computational results can significantly improve the effective fidelity of quantum error correction at the cost of reduced acceptance rates, which can be particularly useful for offline resource st...

Quantum Physics

Implementation of multiparticle quantum speed limits on observables

Rui-Heng Miao, Zhao-Di Liu, Chen-Xi Ning +4 more·Oct 7, 2025

The energy-time uncertainty relation limits the maximum speed of quantum system evolution and is crucial for determining whether quantum tasks can be accelerated. However, multiparticle quantum speed limits have not been experimentally explored. In t...

Quantum Physicsphysics.optics

First experimental measurements of biophotons from Astrocytes and Glioblastoma cell cultures

L. De Paolis, E. Pace, C. Mazzanti +10 more·Oct 7, 2025

Biophotons are non-thermal and non-bioluminescent ultraweak photon emissions, first hypothesised by Gurwitsch in 1924 as a regulatory mechanism in cell division, and then experimentally observed in living organisms. Today, two main hypotheses explain...

physics.bio-phQuantum Physics

The PESCADO Method for Autonomous Systems: An Application to Photoionization at Near-optical Wavelengths

Selstø Sølve, Bendik Steinsvåg Dalen·Oct 7, 2025

In a recent publication, Dalen, and Selstø, Phys. Rev. A {\bf 111}, 033116 (2025), it was demonstrated how converged photo electron spectra could be determined using a complex absorbing potential on a truncated numerical domain considerably smaller t...

Quantum Physics

All-optical bubble trap for ultracold atoms in microgravity

Romain Veyron, Clément Métayer, Jean-Baptiste Gérent +5 more·Oct 7, 2025

In this paper, we present an all-optical method to produce shell-shaped traps for ultracold atoms in microgravity. Our scheme exploits optical double dressing of the ground state to create a short range strongly repulsive central potential barrier. C...

Atomic Physicscond-mat.quant-gasQuantum Physics

Low Overhead Universal Quantum Computation with Triorthogonal Codes

Dawei Jiao, Mahdi Bayanifar, Alexei Ashikhmin +1 more·Oct 7, 2025

We study the use of triorthogonal codes for universal fault-tolerant quantum computation and propose two methods to circumvent the Eastin-Knill theorem, which prohibits any single quantum error-correcting code from supporting both universality and a ...

Quantum Physics

Valley-dependent topological interface states in biased armchair nanoribbons of gapless single-layer graphene for transport applications

Zheng-Han Huang, Jing-Yuan Lai, Yu-Shu G. Wu·Oct 7, 2025

Valley-dependent topological physics offers a promising avenue for designing nanoscale devices based on gapless single-layer graphene. To demonstrate this potential, we investigate an electrical bias-controlled topological discontinuity in valley pol...

Mesoscale PhysicsQuantum Physics
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