State-adapted generalized mean-field projections for Pauli propagation of Heisenberg dynamicsThe Heisenberg picture can make quantum many-body simulation efficient when evolved observables admit compact operator representation within low-dimensional structures. Conventional Pauli-string…Federico Tomás B. Pérez, Gabriela Wójtowicz, Martin B. Plenio·Sep 11, 2026SaveLearn
Fast quantum squeezing of a nanomechanical oscillator with an inverted potentialNonclassical states of nano- and micro-mechanical motion enable measurements beyond the standard quantum limit and constitute a key resource for quantum sensing and metrology. The most strongly…Oscar Schmitt Kremer, Lorenzo Dania, Lukas Novotny et al.·Sep 11, 2026SaveLearn
Testing and Diagnosing Parameter Miscalibration in Probabilistic Error Cancellation via Direct Fidelity EstimationProbabilistic Error Cancellation (PEC) is a standard technique for mitigating noise in quantum computations, but its unbiasedness relies on accurate knowledge of the underlying noise parameters. In…Francesc Sabater, Tristan Kraft, Carlos A. Riofrío et al.·Sep 11, 2026SaveLearn
Spatial symmetry in few-photon interference and quantum metrologyIn previous work [Physical Review Letters, 136(6):060807, 2026], we developed a symmetry-based framework for generalized Hong-Ou-Mandel interference and its applications to quantum metrology. Here,…Éloi Descamps, Pérola Milman·Sep 11, 2026SaveLearn
Average-case hardness of Betti number estimationWe establish the average-case hardness of Betti number estimation on random clique complexes via a reduction from the planted clique problem. We further show that our reduction implies a series of…Sergii Strelchuk, Sathyawageeswar Subramanian, Adam Wesołowski·Sep 11, 2026SaveLearn
Synchronized Spin Trajectories under Collective Weak MeasurementsWe consider locally driven-dissipative quantum spins that undergo a continuous weak measurement of their collective spin. We show that such a system can exhibit full spin-synchronization in…Yiwen Han, Konghao Sun, Wei Yi et al.·Sep 11, 2026SaveLearn
Extremely Low-Cost Magic State Preparation toward Fault-Tolerant Quantum ComputingFault-tolerant preparation of non-Clifford resource states is a major contributor to the overhead of quantum computation, motivating protocols that achieve high output fidelity with minimal qubit and…Jianshuo Gao, Xiao Yuan, Yuan Yao·Sep 11, 2026SaveLearn
Emergent universality in Kraus maps of quantum chaotic many-body dynamicsRecent studies of "deep thermalization" have revealed universal physics in quantum many-body dynamics beyond equilibration towards Gibbs states: maximally random quantum state ensembles can…Qi Camm Huang, Wai-Keong Mok, Tobias Haug et al.·Sep 11, 2026SaveLearn
Log-Sobolev inequality, von Neumann entropy and Entanglement of FormationWe present two results derived from the sharp log-Sobolev inequality for the uniform measure on a complete graph which concern the von Neumann entropy and the Entanglement of Formation of a state of…A. S. Holevo, M. E. Shirokov·Sep 11, 2026SaveLearn
Design and Finite-Element Analysis of a New Inclined Blade-Electrode Architecture for Trapped-Ion Quantum Information ProcessingThe development of scalable quantum technologies requires ion-trap architectures that provide strong and stable confinement while minimizing motional heating caused by electric-field noise.…Nahiyan Archa, Abhinand P, Ahammed Shabeeb et al.·Sep 11, 2026SaveLearn
Travelling Dark State Polariton as a Viable Quantum Memory in a Solid-State MediumWe theorize a quantum memory based on the dark-state polariton field, formed by the superposition of atomic and photonic states of a travelling probe laser pulse under the application of standing…Avirup Chakraborty, Shrabana Chakrabarti·Sep 11, 2026SaveLearn
Violating a Bell Inequality: What to Do When You Lose Your Quantum SystemThe detection loophole is a well-known loophole in Bell nonlocality motivated by the inefficiency of detectors used in Bell experiments. However, this inefficiency is actually a ubiquitous feature of…Xinyu Xu, Yuqing Li, Mingze Xu et al.·Sep 11, 2026SaveLearn
Factoring six-digit integers with superconducting quantum circuitsInteger factorization is a central computational problem with important applications in public-key cryptography. Here, we demonstrate a quantum factorization protocol using a superconducting circuit.…Xi Zhang, Xinsheng Tan, Yang Yu·Sep 11, 2026SaveLearn
Security Implications of Measurement Based Crosstalk on Superconducting Quantum ComputersCrosstalk is one of the major issues for scalability of superconducting quantum processors. But it can also be used by threat actors to intentionally sabotage computations and steal information. This…Subarna Adhikari, Kimmo Halunen·Sep 11, 2026SaveLearn
Relative entropy representations via tracial joint spectral measuresWe show that for positive semidefinite A and B the relative entropy can be written as D(A\|B)=2∫ a(a/b)\,dμA,B(a,b), where μA,B denotes Heinävaara's tracial joint…Lukas Schmitt·Sep 11, 2026SaveLearn
Extended Wigner's Friend Scenarios with Agent-like Observers on Quantum ComputersThe Wigner's friend thought experiment raises the question of whether quantum theory can be applied consistently to systems that include observers. Extended Wigner's Friend Scenarios develop…Joshua Laux, Eric G. Cavalcanti·Sep 11, 2026SaveLearn
Quantum neural network equipped with backpropagation on a qudit processorQuantum neural networks (QNNs), one of the fundamental algorithms in quantum machine learning, have been widely used in classification and identification tasks. However, the capabilities of QNNs are…Yibo Yuan, Zhuoyue Xu, Zhenyue Du et al.·Sep 11, 2026SaveLearn
The Low-Individual-Degree Test Without the Diagonal-Lines Test Is Not Quantum-SoundTo prove the quantum soundness of the classical low-individual-degree test, the authors of JNVWY20LID defined three subtests, namely the axis-parallel lines test, the self-consistency test,…Tianrun Zhao·Sep 11, 2026SaveLearn
Finite-size Entanglement Certification via Third-Order Local Randomized MeasurementsCertifying entanglement in high-dimensional systems usually requires full state tomography, whose cost grows rapidly with the system dimension. Local randomized measurements offer a scalable…Giovanni Scala, Corrado Cosimo Mattiacci, Dorota Pietryka et al.·Sep 11, 2026SaveLearn
Pauli-string grouping for VQE measurement reduction on a sparse-connectivity quantum annealerThe Variational Quantum Eigensolver (VQE) requires a large number of measurements to evaluate molecular Hamiltonians. Expressing a molecular Hamiltonian as a linear combination of Pauli strings…Raul Martinez, Miguel Sanchez-Beato, Mario Calonge·Sep 10, 2026SaveLearn
Physical Counterexamples to the Wigner Shannon Entropy ConjectureWe construct physical quantum states with everywhere positive Wigner functions whose Shannon entropy lies below the vacuum value 1+π. Besides an explicit finite-energy counterexample, we obtain…Zixuan He·Sep 10, 2026SaveLearn
Dynamical qubit cooling via quasi-particle transportCooling a quantum state presents a challenge as the external control in active protocols can induce detrimental heating in the system. Passive cooling processes offer a valuable alternative: Here, we…Kyle Monkman, Jasmin Bedow·Sep 10, 2026SaveLearn
A Simple Quantum Linear-System Solver via DissipationDissipation has been recently demonstrated as a powerful primitive for designing quantum algorithms. We apply this viewpoint directly to linear-system solving, Ax=b. We construct a simple purely…Zhong-Xia Shang·Sep 10, 2026SaveLearn
Sparse-Blossom Decoding in o(1) TimeMatching-based decoding is widely used in quantum error correction, and accelerating it is key to enabling fast and scalable fault-tolerant quantum computation. Minimum-weight perfect matching (MWPM)…Ryo Mikami, Hayata Yamasaki·Sep 10, 2026SaveLearn
Keyless secrecy against bounded adversariesWe introduce a keyless coding/cryptographic primitive that asks for two guarantees at once: the receiver is never fooled into accepting a message other than the one sent, and the adversary learns…Anne Broadbent, Upendra Kapshikar, Denis Rochette·Sep 10, 2026SaveLearn