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arXiv:2604.19017v1 Announce Type: new Abstract: We study quantum sensing with Floquet chaotic dynamics generated by Haar random unitary gates. The metrological resources consist of three ingredients: …
arXiv:2604.19013v1 Announce Type: new Abstract: We present a compact, automated, high-brightness entangled photon source capable of generating all four Bell states with high fidelity. The system utili…
arXiv:2604.18996v1 Announce Type: new Abstract: The fate of non-trivial many-body states subject to decoherence is of both fundamental and practical interest. Here, we demonstrate a new analytic techn…
arXiv:2604.18990v1 Announce Type: new Abstract: The non-Hermitian skin effect can lead to directional amplification of response, with the associated end-to-end Green's function generally exhibiting si…
arXiv:2604.18968v1 Announce Type: new Abstract: Standard quantum error correction (QEC) models typically assume discrete, Markovian noise, obscuring the continuous quantum nature of physical environme…
arXiv:2604.18960v1 Announce Type: new Abstract: Quantum entanglement in systems of identical particles is often obscured by the interplay between exchange-induced correlations and the operational fram…
arXiv:2604.18937v1 Announce Type: new Abstract: The negatively charged nitrogen-vacancy center (NV$^-$) in diamond is a versatile platform for quantum magnetometry under ambient conditions. Recently, …
arXiv:2604.18884v1 Announce Type: new Abstract: The quantum instrument (QI) formalism is required to model mid-circuit measurements (MCMs) and the dependence of the post-measurement state on the measu…
arXiv:2604.18846v1 Announce Type: new Abstract: Barren-plateau results have established exponential gradient suppression as a widely cited obstacle to the scalability of variational quantum algorithms…
arXiv:2604.18841v1 Announce Type: new Abstract: We introduce QuIC, a training-free quantum graph embedding that maps graphs to sorted output distributions via a fixed parameterized circuit. In the ide…
arXiv:2604.18837v1 Announce Type: new Abstract: Quantum kernel methods have been proposed as a promising approach for leveraging near-term quantum computers for supervised learning, yet rigorous bench…
arXiv:2604.18833v1 Announce Type: new Abstract: Considerable effort has been devoted to developing techniques for witnessing and characterizing quantum resources that emerge from collective properties…
arXiv:2604.18832v1 Announce Type: new Abstract: We demonstrate sub-Poissonian twin-beam generation via near-degenerate spontaneous four-wave mixing in warm $^{85}\mathrm{Rb}$ at 795 nm. The twin beams…
arXiv:2604.18763v1 Announce Type: new Abstract: We investigate spontaneous radiative processes in a driven polar two-level system whose interaction with the laser field is dominated by broken inversio…
arXiv:2604.18760v1 Announce Type: new Abstract: We establish an exact identity among four dimensionless invariants accessible by standard polarimetric and interferometric measurements in a polarized d…
arXiv:2604.18754v1 Announce Type: new Abstract: We develop a unified quantum framework for subgraph counting in graphs. We encode a graph on $N$ vertices into a quantum state on $2\lceil \log_2 N \rce…
arXiv:2604.18750v1 Announce Type: new Abstract: We investigate discriminability from an operational and contextuality-oriented perspective using a two-copy comparison game based on SWAP-type measureme…
arXiv:2604.18734v1 Announce Type: new Abstract: Dynamic quantum circuits integrate unitary evolution with mid-circuit measurement and feedforward, enabling conditional operations essential for efficie…
arXiv:2604.18720v1 Announce Type: new Abstract: The effective description of a bosonic quantum system identifies the minimum finite dimension required to capture its essential dynamics. This effective…
arXiv:2604.18714v1 Announce Type: new Abstract: Quantum low-density parity-check codes are promising candidates towards scalable fault-tolerant quantum computation. Among these, bivariate bicycle (BB)…
arXiv:2604.18707v1 Announce Type: new Abstract: We study synchronization in the XX qubit chain subject to local or multi-local amplitude-damping noise. Analyzing the decoherence-free subspace (DFS) st…
arXiv:2604.18699v1 Announce Type: new Abstract: Global control offers a promising route to scalable quantum computing. A recent conjecture by Hu et al. (arXiv:2508.19075) proposes that any connected q…
arXiv:2604.18691v1 Announce Type: new Abstract: Quantum machine learning has attracted significant interest in recent years. Most existing approaches, however, are variational in nature and require ex…
arXiv:2604.18662v1 Announce Type: new Abstract: Single-photon routers in cavity and circuit QED direct photons based on which energy eigenstate a qubit occupies -- a projective decision that destroys …