Papers
Live trends in quantum computing research, updated daily from arXiv.
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Dispersion Relations in Two- and Three-Dimensional Quantum Systems
Valeriia Bilokon, Elvira Bilokon, Illya Lukin +2 more·Sep 18, 2025
Extracting momentum-resolved excitation spectra in strongly correlated quantum systems remains a major challenge, especially beyond one spatial dimension. We present an efficient tensor-network approach to compute dispersion relations via imaginary-t...
Integrated high-fidelity preparation and analysis of photonic two-qubit states for quantum network nodes
Jonas C. J. Zatsch, Tim Engling, Jeldrik Huster +3 more·Sep 18, 2025
The realisation of quantum networks requires local quantum information processing at the network nodes and highly efficient transmission of quantum information across the network. Integrated photonics, based on silicon-on-insulator, is a promising pl...
Living on the edge: a non-perturbative resolution to the negativity of bulk entropies
Stefano Antonini, Luca V. Iliesiu, Pratik Rath +1 more·Sep 18, 2025
Lin, Maldacena, Rozenberg, and Shan (LMRS) presented a new information paradox in black hole physics by noticing that the entanglement and Rényi entropies in a two-sided black hole can become negative when the geometry contains a very large number of...
Circuit-based characterization of finite-temperature quantum phases and self-correcting quantum memory
Ruochen Ma, Vedika Khemani, Shengqi Sang·Sep 18, 2025
Quantum phases at zero temperature can be characterized as equivalence classes under local unitary transformations: two ground states within a gapped phase can be transformed into each other via a local unitary circuit. We generalize this circuit-bas...
Sampled-Based Guided Quantum Walk: Non-variational quantum algorithm for combinatorial optimization
Ugo Nzongani, Dylan Laplace Mermoud, Giuseppe Di Molfetta +1 more·Sep 18, 2025
We introduce SamBa-GQW, a novel quantum algorithm for solving binary combinatorial optimization problems of arbitrary degree with no use of any classical optimizer. The algorithm is based on a continuous-time quantum walk on the solution space repres...
Geometric optimization for quantum communication
Chengkai Zhu, Hongyu Mao, Kun Fang +1 more·Sep 18, 2025
Determining the ultimate limits of quantum communication, such as the quantum capacity of a channel and the distillable entanglement of a shared state, remains a central challenge in quantum information theory, primarily due to the phenomenon of supe...
Dynamical decoupling protection for three-level systems
P. Z. Zhao, Lei Qiao·Sep 18, 2025
In addition to the traditional two-level system, the three-level system serves as another important elemental building block for the manipulation of qubits. However, the quantum information processing in the three-level system is also subject to the ...
Can Hawking effect of multipartite state protect quantum resources in Schwarzschild black hole?
Shu-Min Wu, Xiao-Wei Teng, Hui-Chen Yang +3 more·Sep 18, 2025
Most previous studies on relativistic quantum information have primarily focused on the vacuum state $|0\rangle$ and the first excited state $|1\rangle$ in two-mode entangled systems. In this work, we go beyond these limitations by considering arbitr...
Qompiler: A Traceable Quantum Circuit Synthesizer for Arbitrary Hamiltonians
Shoupu Wan·Sep 18, 2025
We present a quantum compiler framework that bridges the gap between physics modeling and quantum software development. At the core of this framework is a versatile quantum circuit synthesizer capable of decomposing arbitrary Hamiltonians into quantu...
Quantum steering and discord in hyperon-antihyperon system in electron-positron annihilation
Sihao Wu, Chen Qian, Qun Wang +1 more·Sep 18, 2025
Hyperon-antihyperon pairs produced in high-energy electron-positron annihilation are promising systems for the study of quantum information properties. In this work, we make an analysis of two types of quantum correlations, the quantum steering and d...
Quantum Metrology of Spin Sensing with Free Space Electrons
Santiago Beltrán-Romero, Michael Gaida, Philipp Haslinger +2 more·Sep 18, 2025
Recent advances in transmission electron microscopy (TEM) have opened the path toward spin resonance spectroscopy with single-spin sensitivity. To assess this potential, we investigate the quantum precision limits for sensing magnetic moments with fr...
Ghost Imaging with Free Electron-Photon Pairs
Sergei Bogdanov, Alexander Preimesberger, Harsh Mishra +11 more·Sep 18, 2025
Coincidence imaging, also known as ghost imaging, is a technique that exploits correlations between two particles to reconstruct information about a specimen. The particle that relays the spatial information about the object remains completely non-in...
No-go theorem for quantum realization of extremal correlations
Sujan V. K, Ravi Kunjwal·Sep 18, 2025
The study of quantum correlations is central to quantum information and foundations. The paradigmatic case of Bell scenarios considers product measurements implemented on a multipartite state. The more general case of contextuality scenarios--where t...
On Finite-Blocklength Noisy Classical-Quantum Channel Coding With Amplitude Damping Errors
Tamás Havas, Hsuan-Yin Lin, Eirik Rosnes +1 more·Sep 18, 2025
We investigate practical finite-blocklength classical-quantum channel coding over the quantum amplitude damping channel (ADC), aiming to transmit classical information reliably through quantum outputs. Our findings indicate that for any finite blockl...
Coupling 4H-Silicon Carbide spins to a microwave resonator at milli-Kelvin temperature
Ali Fawaz, Jeremy Bourhill, Stefania Castelletto +6 more·Sep 18, 2025
Coupling microwave cavity modes with spin qubit transitions is crucial for enabling efficient qubit readout and control, long-distance qubit coupling, quantum memory implementation, and entanglement generation. We experimentally observe the coupling ...
Resource-efficient linear-optical generation of GHZ-like states
Suren A. Fldzhyan, Stanislav S. Straupe, Mikhail Yu. Saygin·Sep 18, 2025
Heralded multi-photon entanglement generation is a central bottleneck for photonic quantum computing, where resource costs typically skyrocket with target size. We explore efficient methods for generating photon states with tunable entanglement, prov...
Quantum router of silicon-vacancy centers via a diamond waveguide
Wen-Jie Zhang, Xi Yan, Jun-Hong An·Sep 18, 2025
As a key component of quantum networks, the quantum router distributes quantum information among different quantum nodes. The silicon-vacancy (SiV) center in diamond offers a promising platform for quantum technology due to its strong strain-induced ...
Proposal of cavity quantum acoustodynamics platform based on Lithium Niobate-on-Sapphire chip
Xin-Biao Xu, Lintao Xiao, Bo Zhang +9 more·Sep 18, 2025
A scalable hybrid cavity quantum acoustodynamics (QAD) platform is proposed. The architecture integrates superconducting transmon qubits with phononic integrated circuits on a single chip made by lithium niobate-on-sapphire substrate. The platform su...
Distances between pure quantum states induced by a distance matrix
Tomasz Miller, Rafał Bistroń·Sep 18, 2025
With the help of a given distance matrix of size $n$, we construct an infinite family of distances $d_p$ (where $p \geq 2$) on the complex projective space $\mathbb{P}(\mathbb{C}^n)$ modelling the space of pure states of an $n$-level quantum system. ...
The superconducting grid-states qubit
Long B. Nguyen, Hyunseong Kim, Dat T. Le +9 more·Sep 18, 2025
Decoherence errors arising from noisy environments remain a central obstacle to progress in quantum computation and information processing. Quantum error correction (QEC) based on the Gottesman-Kitaev-Preskill (GKP) protocol offers a powerful strateg...