Papers
Live trends in quantum computing research, updated daily from arXiv.
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Simplified scheme for continuous-variable entanglement distillation: multicopy distillation of Gaussian entanglement without heralding Gaussian measurements
Jaromír Fiurášek·Sep 18, 2025
Entanglement of continuous-variable Gaussian states can be distilled by combination of de-Gaussifying operation such as single-photon subtraction and iterative heralded Gaussification. Here we present and analyze a simplified equivalent version of su...
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 ...
Simultaneous Speedmeter and Position-Meter Response in a Single Tabletop Interferometer
Mikhail Korobko, Xiang Li, Torben Sobottke +3 more·Sep 18, 2025
Quantum radiation-pressure noise (QRPN) limits the low-frequency sensitivity of gravitational wave detectors. The established method for suppressing QRPN is the injection of frequency-dependent squeezed light. It requires long-baseline filter cavitie...
Magnetic-Field and Temperature Limits of a Kinetic-Inductance Traveling-Wave Parametric Amplifier
Lucas M. Janssen, Farzad Faramarzi, Henry G. LeDuc +5 more·Sep 18, 2025
Kinetic-inductance traveling-wave parametric amplifiers (KI-TWPAs) offer broadband near-quantum-limited amplification with high saturation power. Due to the high critical magnetic fields of high-kinetic-inductance materials, KI-TWPAs should be resili...
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...
Julia Set in Quantum Evolution: The case of Dynamical Quantum Phase Transitions
Manmeet Kaur, Somendra M. Bhattacharjee·Sep 18, 2025
Dynamical quantum phase transitions (DQPTs) are a class of non-equilibrium phase transitions that occur in many-body quantum systems during real-time evolution, rather than through parameter tuning as in conventional phase transitions. This paper pre...
Quantum Gambling: Best-Arm Strategies for Generator Selection in Adaptive Variational Algorithms
Rick Huang, Artur F. Izmaylov·Sep 18, 2025
Adaptive variational algorithms suffer from prohibitively high measurement costs during the generator selection step, since energy gradients must be estimated for a large operator pool. This scaling bottleneck limits their applicability to larger mol...
Simultaneous Matching of Phase and Amplitude for Spontaneous Parametric Down-conversion in Semiconductor Waveguides
Albert Peralta Amores, Marcin Swillo·Sep 18, 2025
We propose a non-uniform modulation of $χ^{(2)}_{xyz}$ to significantly enhance photon pair generation efficiency via spontaneous parametric down-conversion in modal phase-matched semiconductor waveguides. This approach enables amplitude-matching in ...
Exploring dark matter with quantum-enhanced haloscopes and time projection chambers
David Díez-Ibáñez·Sep 18, 2025
This thesis explores experimental and theoretical approaches to dark matter detection, from gas-based detectors to quantum sensors, tackling the challenge of identifying dark matter, which makes up 27% of the Universe's energy. It reviews astrophysic...
Imaging of electrical signals in a quantum SiC microscope
A. Suhana, T. A. U. Svetikova, C. Schneider +3 more·Sep 18, 2025
We report the experimental realization of a quantum silicon carbide microscope (QSiCM) and demonstrate its functionality by imaging magnetic fields generated by electrical currents. We employ a dual-frequency sensing protocol to enhance the readout c...
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...
Fermat's Spiral-Based Characterization of Squeezed Nonlinear Motional States of Levitated Nanoparticle
Martin Duchaň, Alexandr Jonáš, Radim Filip +4 more·Sep 18, 2025
Controlling the state of motion of optically levitated nanoparticles is crucial for the advancement of precision sensing, fundamental tests of physics, and the development of hybrid classical-quantum technologies. Experimentally, such control can be ...
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 ...
Spin-photon coupling using circular double quantum dots
Ferdinand Omlor, Florinda Viñas Boström, Martin Leijnse·Sep 18, 2025
We propose and analyze a microwave spin-photon interface based on a circular double quantum dot, inspired by recent experimental observations of anisotropic g-factors and ring states in InAs nanowires. We develop an effective theoretical model captur...
Krylov Complexity for Open Quantum System: Dissipation and Decoherence
Arpan Bhattacharyya, Sayed Gool, S. Shajidul Haque·Sep 18, 2025
We investigate Krylov complexity in open quantum systems using Lindblad master equations for bosonic bath models, with particular emphasis on the Caldeira--Leggett model. Krylov complexity is computed from the moments of the two-point function within...