Papers

Sebastian Malewicz, Laura Serino, Marcelo P. de Almeida +6 more·Jun 30, 2026

Hong-Ou-Mandel interference is one of the clearest signatures of quantum behaviour: two identical photons meeting at a beam splitter always leave together. Here we demonstrate that this symmetry can be broken. Using a programmable integrated photonic...

Jasel Berra-Montiel, Alberto Molgado, Jorge Santacruz·Jun 30, 2026

We introduce an explicit construction of the non-diagonal and diagonal Wigner distributions for the homogeneous but anisotropic Taub and Kantowski-Sachs cosmological models within the framework of phase space deformation quantization. Conventional ca...

Hongyi Zhou, Yu Han, Qiechun Chen +1 more·Jun 30, 2026

Continuous-variable source-independent quantum random number generators offer the highest generation rates among semi-device-independent protocols. In reality, the protocol design is limited due to permissible measurement configurations. In this work...

Ke-Xiong Yan, Jia-Wen Yu, Yiming Yu +5 more·Jun 30, 2026

High-power Dicke quantum batteries (QBs) typically exploit collective superradiance, whereas intrinsic matter-matter interactions are conventionally considered detrimental. Here, we propose a counterintuitive paradigm: these interactions can be contr...

Yiming Yu, Xinyu Zhao, Jia-Wen Yu +5 more·Jun 30, 2026

Fast qubit readout conventionally encodes state information in a dispersive frequency shift. Here we formulate a linewidth-encoded quantum non-demolition measurement channel in which the qubit state enters the external radiative amplitude, equivalent...

Hao-Fan Wang, Wen Zhou, Lin Chen +1 more·Jun 30, 2026

We derive improved lower bounds of concurrence induced by symmetric measurements, which retains experimental feasibility without state tomography. More importantly, we resolve a related inequality conjecture, which implies that numerous previous resu...

Tao Jiang, Jie Liu, Li-Chen Zhao·Jun 30, 2026

We investigate the Thouless pumping dynamics of nonlinear gap solitons and attempt to realize topological Chern number switching by modulating nonlinear parameters and varying the ramping rate of the relative phase between periodic potentials. We fin...

Zhe He, Yanli Shi, Hui Wu +3 more·Jun 30, 2026

Camera-based quantum imaging detects spatially correlated photon pairs from spontaneous parametric down-conversion (SPDC). Conventional covariance methods typically require tens of thousands of frames to extract weak correlations from noise. While th...

Gero von Gersdorff·Jun 29, 2026

We revisit the calculation of the von Neumann (or "entanglement") entropy of a subsystem of a pure quantum state, under the assumption that the latter is drawn at random from a uniform distribution on the full Hilbert space. We derive simple and clos...

Partha Nandi, Giuseppe Vitiello·Jun 29, 2026

Can a closed quantum system generate time-crystal-like nonequilibrium behavior, self-similar scaling structures, and non-Markovian memory without external driving or coupling to a macroscopic environment? We address this question within the quantum B...

Justyna P. Zwolak, Anthony Sigillito·Jun 29, 2026

Over the past decade, semiconductor spin qubits have progressed from few-qubit demonstrations towards larger-scale devices fabricated in increasingly reproducible academic and industrial processes. This progress marks an inflection point: the central...

Shivam Sinha, Sumit Achar, Sankar Satheesh +1 more·Jun 29, 2026

The $5S_{1/2} \rightarrow 6P_{3/2}$ transition of rubidium at $420$ nm is a promising candidate for a portable warm-vapor all-optical atomic clock. Despite recent precision spectroscopy studies at $420$ nm in Rb, an experimental determination of the ...

Kanato Goto, Yuta Hamada, Kohtaro Kato +6 more·Jun 29, 2026

This paper presents a curated selection of research questions at the intersection of quantum gravity and quantum information, chosen to highlight issues that we regard as particularly important for researchers in both fields. We organize the discussi...

Shanmuka Shivashankara, Isra Gashi·Jun 29, 2026

When two initially entangled photons each undergo Compton scattering, the scattered electrons become correlated. However, the final reduced density matrix of one scattered pair is not influenced by the other scattered pair due to unitarity. Herein, w...

Francis J. Headley·Jun 29, 2026

We derive the exact image-dipole potential of a point dipole inside a closed cuboidal superconducting trap. The construction generalises the parallel-plate result to a geometry that confines every translational degree of freedom, and we prove that th...

Guanchen Tao, Alexander Knapen, Jacob Mack +4 more·Jun 29, 2026

Scaling fault tolerant quantum computing is increasingly constrained by the limited bandwidth and power budget across the 4 K to room temperature (RT) interface. We present CryoZip, a cross stack cryogenic compression framework that cooperates with a...

Dorian W. P. Amaral, Lei Cong, Tim M. Fuchs +2 more·Jun 29, 2026

We present a magnetically levitated ferromagnetic vector force sensor that enables selective searches for spin-dependent exotic interactions mediated by beyond-Standard-Model bosons. A defining feature of spin-dependent exotic interactions is that th...

Sehmimul Hoque, Roger Melko, Pooya Ronagh·Jun 29, 2026

We introduce a novel technique for scalable sampling of spin-system states with continuous symmetries using diffusion models. By applying our approach to the XY model, a fundamental continuous-spin model in condensed matter physics, we show that our ...

Óscar Rios Alves, Filippo Ferrari, Lorenzo Fioroni +2 more·Jun 29, 2026

We investigate the interplay between cavity-induced density-wave ordering and controllable disorder in a trapped two-dimensional gas of ultracold fermions. The atoms are dispersively coupled to an optical cavity and transversely driven by a pump beam...

J. A. Aguilar-Saavedra, S. Rodríguez-Benítez·Jun 29, 2026

We investigate quantum steering and Bell nonlocality in top-quark pair production at the LHC near threshold. The toponium contribution strengthens the spin-singlet component and substantially enhances the entanglement between the two quark spins. Wit...