Papers

Olalla A. Castro-Alvaredo·Mar 21, 2026

In this paper I propose a branch point twist field approach to computing a temporal entropy, that is, an entanglement measure across different time regions, as opposed to the usual spacial measures. I discuss how the shift to time-dependence manifest...

Roland Cristopher F. Caballar·Mar 21, 2026

We show that, for a one - dimensional open quantum system of ultracold atoms trapped in an array of harmonic potentials that is weakly coupled to a background Bose - Einstein Condensate (BEC), a unique steady state emerges at either of the two edges ...

Federico Girotti, Jukka Kiukas, Mădălin Guţă·Mar 21, 2026

In this paper we investigate the asymptotic statistical theory of irreducible quantum Markov chains, focusing on identifiability properties and asymptotic convergence of associated quantum statistical models. We show that the space of identifiable pa...

Giuseppe Colletta, Susan Johny, Hua Feng +3 more·Mar 21, 2026

We report the realization of multilayer three-dimensional nanobridge Josephson junctions based on Nb/NbN and Nb/TiN superconducting stacks fabricated using electron-beam lithography and chlorine-based dry etching. In this architecture, a high-resisti...

Tony Lau·Mar 21, 2026

We demonstrate that the largest gap between the entangled value and the classical value for a one-round two-player nonlocal game with a perfect entangled strategy using two Bell states of entanglement is at least $\frac{4}{35}$, improving on the gap ...

Jahyeok Han, Donghyeok Le, Minseok Ryu +3 more·Mar 21, 2026

We propose a frequency-division multiplexed (FDM) continuous-variable quantum key distribution (CV-QKD) system with enhanced spectral efficiency through dense multiplexing of low-symbol-rate signals. A four-channel 10-Mbaud FDM-CV-QKD system was expe...

Nalan Wang, Lin Chen, Zhiwei Song·Mar 21, 2026

Whether the sets of absolutely separable (AS) and absolutely two-qutrit positive-partial-transpose (AP) states are the same has been an open problem in entanglement theory for decades. Since they are both convex sets, we investigate the boundary and ...

Loris Ferrari·Mar 21, 2026

The quantum corrections to the behavior of a semi-classical gas can be expressed as a power series of the ratio $eta$ between the cube of De Broglie's thermal wavelength and the specific volume. The connection between $eta$ and the multioccupancy of ...

Guilherme E. L. Pexe, Lucas A. M. Rattighieri, Leandro A. Passos +4 more·Mar 21, 2026

Finding the minimum spanning tree (MST) of a graph is an important task in computer vision, as it enables a sparse and low-cost representation of connectivity among elements (such as superpixels, points, or regions), which is useful for tasks such as...

Sumit Tapas Chongder·Mar 21, 2026

Classical supply chain risk models treat node failures as statistically independent events, systematically underestimating cascade probabilities when supplier dependencies are strongly correlated. At n=40 nodes, the full correlated failure distributi...

Riccardo Fantoni·Mar 21, 2026

We solve numerically exactly a simple toy model to quantum general relativity or more properly to path integral on a curved space. We consider the thermal equilibrium of a quantum many body problem on the sphere, the surface of constant positive curv...

Sibasish Mishra, Aritra Sarkar, Sebastian Feld·Mar 21, 2026

The scalability of quantum computing in supporting sophisticated algorithms critically depends not only on qubit quality and error handling, but also on the efficiency of classical control, constrained by the cryogenic control bandwidth and energy bu...

Liang Luo, Shun-Cai Zhao·Mar 21, 2026

Open quantum batteries (QBs) operate under unavoidable system-environment interactions, where both dissipation and coherent renormalization influence their performance. While most previous studies focus on dissipative effects, the role of environment...

Eliseo Sarmiento Rosales, Egor Maximenko, Dionisio Manuel Tun Molina +3 more·Mar 21, 2026

We establish an exact noise-model-derived characterization of quantum error correction under diagonal local phase noise. Under uniform locality, the maximal logical dimension under t-local phase errors equals Aq(n,2t+1), the classical q-ary packing f...

Kun Yang, Yaoming Chu, Ning Wang +1 more·Mar 21, 2026

Non-Hermitian systems have emerged as a powerful paradigm for ultrasensitive sensing, leveraging unique spectral and dynamical properties that find no counterparts in Hermitian physics. While recent theoretical assessments have established that these...

J. Gunnell, T. Griffiths, Boris B. Blinov·Mar 21, 2026

Trapped atomic ion qubits exhibit long coherence times and high fidelity qubit state preparation, manipulation and detection, making them well-suited for scalable quantum computing applications. Among several atomic species used in quantum computing ...

Richard Dong, Abhinav Kala, Andrew Lingenfelter +3 more·Mar 20, 2026

The development of many scalable quantum technologies requires single-photon nonlinearity, such as single-photon blockade, in solid-state systems. Recently, it has been shown that single-photon Fock states can, in principle, be unconditionally genera...

Prathamesh S. Joshi, Emil Prodan·Mar 20, 2026

We point out that, when an optimization problem has more than one solution, the quantum adiabatic algorithms (QAA) encounter topological obstructions leading to adiabatic spectral flows where spectral branches unavoidably traverse the spectral gap ab...

Soumadeep Maiti·Mar 20, 2026

We introduce a Lindblad-deformed spectral geometric framework in which bounded dissipative data deform a standard spectral triple through the Dirac operator D_gamma = D - igammaSigma, where Sigma = (1/2) sum_k L_k^dagger L_k is constructed from Lindb...

Petr Sramek·Mar 20, 2026

Scalable quantum characterization and error-mitigation workflows often rely on the assumption that relevant device noise and readout contamination can be adequately captured by low-weight, predominantly pairwise interactions. We report a compact hard...