Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Characterization-free classification and identification of the environment between two quantum players
Masahito Hayashi, Longyang Cao, Baichu Yu +1 more·Feb 24, 2026
Classifying the causal structure of quantum channels is essential for verifying quantum networks and certifying quantum resources. We introduce a characterization-free protocol enabling two isolated players, Alice and Bob, to classify and identify th...
Entanglement-Induced Resilience of Quantum Dynamics
Tianfeng Feng, Yue Cao, Wenjun Yu +4 more·Feb 24, 2026
Quantum many-body devices suffer from imperfections that destabilize dynamics and limit scalability. We show that the dynamical growth of entanglement can intrinsically protect generic quantum dynamics against coherent and perturbative noise. Through...
Quantum-limited detection of arrival time and carrier frequency of time-dependent signals
Patrick Folge, Laura Serino, Ladislav Mišta +4 more·Feb 24, 2026
Precise measurements of both the arrival time and carrier frequency of light pulses are essential for time-frequency-encoded quantum technologies. Quantum mechanics, however, imposes fundamental limits on the simultaneous determination of these quant...
Quantum geometry-driven photogalvanic responses in semi-Dirac systems
Bristi Ghosh, Malay Bandyopadhyay, Snehasish Nandy·Feb 24, 2026
The photogalvanic effect (PGE), a fundamental nonlinear optical phenomenon in non-centrosymmetric materials, generates direct photocurrent under polarized light. Using quantum kinetic theory within the relaxation-time approximation, we theoretically ...
Adversarial Information Gain in Non-ideal Quantum Measurements
Andrés Muñoz-Moller, Leevi Leppäjärvi, Teiko Heinosaari·Feb 24, 2026
Performing a quantum measurement yields two different results: a classical outcome drawn from a probability distribution, according to Born's rule, and a quantum outcome corresponding to the post-measurement state. Quantum devices that provide both o...
Experimental Asynchronous Measurement-Device-Independent Quantum Cryptographic Conferencing
Yifeng Du, Yang Hu, Yufeng Liu +4 more·Feb 24, 2026
The quantum cryptographic conferencing (QCC) protocol, which distributes identical secure keys to user groups, is a crucial component of the quantum network. Previous experimental works have implemented the measurement-device-independent (MDI) QCC, o...
Enhancing low-temperature quantum thermometry and magnetometry via quadratic interactions in optomechanical-like systems
Asghar Ullah, Özgür E. Müstecaplıoğlu·Feb 24, 2026
Standard optomechanical sensors operating in the low-temperature regime often face fundamental precision limits imposed by vacuum fluctuations. Here, we demonstrate that moving beyond conventional radiation-pressure interactions and exploiting quadra...
Error correction with brickwork Clifford circuits
Twan Kroll, Jonas Helsen·Feb 24, 2026
We prove that random 1D Clifford brickwork circuits form (in expectation) good approximate quantum error correction codes in logarithmic depth. Our proof makes use of the statistical mechanics techniques for random circuits developed by Dalzell et al...
$σ$-VQE: Excited-state preparation of quantum many-body scars with shallow circuits
Eoin Carolan, Nathan Keenan, Gabriele Cenedese +1 more·Feb 24, 2026
We present and benchmark a type of variational quantum eigensolver (VQE), which we denote the $σ$-VQE. It is designed to target mid-spectrum eigenstates and prepare quantum many-body scar states. The approach leverages the fact that noisy intermediat...
Efficient two-color Floquet control of the RKKY interaction in altermagnets
Mohsen Yarmohammadi, Pei-Hao Fu, James K. Freericks·Feb 24, 2026
Magnetic impurities in real materials can mask the intrinsic spin-dependent properties of hosts. They interact indirectly through the Ruderman-Kittel-Kasuya-Yosida (RKKY) mechanism, which limits the use of isolated impurity spins in applications such...
Simulating Microwave-Controlled Spin Imaging with Free-Space Electrons
Santiago Beltrán-Romero, Stefan Löffler, Dennis Rätzel +1 more·Feb 24, 2026
Coherent spin resonance techniques, such as nuclear and electron spin resonance spectroscopy, have revolutionized non-invasive imaging by providing spectrally resolved information about spin dynamics. Motivated by the recent emergence of electron mic...
A mathematical model for the Einstein-Podolsky-Rosen argument
Riccardo Adami, Luigi Barletti, Alessandro Teta·Feb 24, 2026
We study a nonrelativistic system made of two quantum particles constrained to move on a line and a spin located at a fixed point of the line. Initially the two particles are in a maximally entangled state and the spin is down. The first particle int...
Mach-Zehnder interferometer for in-situ characterization of atom traps
Alexander Wolf, Maxim A. Efremov·Feb 24, 2026
Manipulating cold atoms in traps is a key tool for numerous realizations of quantum simulators and quantum sensors. They require accurate modeling and characterization of the underlying trapping potentials. We introduce a technique based on the Mach-...
Quantum discord of mixed states under noisy channels in the curved spacetime
Yuxuan Xiong, Zhiling Pi, Tinggui Zhang +1 more·Feb 24, 2026
We focus our attention on two-qubit mixed states as initial states, and apply the geometric measure of quantum discord to investigate quantum discord properties in the background of a Schwarzschild black hole under phase damping, phase flip and bit f...
Quantum coherence of mixed states under noisy channels in noninertial frames
Tangrui Liao, Junhao Yang, Tinggui Zhang +1 more·Feb 24, 2026
We focus our attention on tripartite mixed states as initial states, and apply coherence concurrence to investigate quantum coherence properties in the background of a Schwarzschild black hole under phase damping, phase flip and bit flip channels, re...
Toward speedup without quantum coherent access
Nhat A. Nghiem·Feb 24, 2026
Along with the development of quantum technology, finding useful applications of quantum computers has been a central pursuit. Despite various quantum algorithms have been developed, many of them often require strong input assumptions, which is hardw...
Suppressed correlation-spreading in a one-dimensional Bose-Hubbard model with strong interactions
Jose Carlos Pelayo, Ippei Danshita·Feb 24, 2026
We investigate signatures of non-ergodic behavior in the real-time evolution of a one-dimensional Bose-Hubbard model, where the initial state is a doubly occupied density-wave state. We show that the occupation dynamics at strong interactions is domi...
Generative Deep Learning for the Two-Dimensional Quantum Rotor Model
Yanyang Wang, Feng Gao, Kui Tuo +1 more·Feb 24, 2026
The advancement of diverse generative deep learning models and their variants has furnished substantial insights for investigating quantum many-body problems. In this work, we design two models based on the foundational architecture of generative adv...
A note on entanglement detection via the generalized realignment moments
Xiaofen Huang, Xishun Zhu, Bin Chen +2 more·Feb 24, 2026
The experimental detection of quantum entanglement is of great importance in quantum information processing. We present two separability criteria based on the generalized realignment moments. By incorporating additional parameters, these criteria pro...
Stochastic Neural Networks for Quantum Devices
Bodo Rosenhahn, Tobias J. Osborne, Christoph Hirche·Feb 24, 2026
This work presents a formulation to express and optimize stochastic neural networks as quantum circuits in gate-based quantum computing. Motivated by a classical perceptron, stochastic neurons are introduced and combined into a quantum neural network...