Papers

A. Takacs, J. Dubail, P. Calabrese·Mar 31, 2026

We study the dynamics of a lattice hard-core boson gas released from a domain wall initial state in the presence of two weak links (defects). When the two defects are separated by a finite distance, the resulting density profile exhibits clear deviat...

Venelin P. Pavlov, Bogomila S. Nikolova, Peter A. Ivanov·Mar 31, 2026

We propose an adiabatic Ramsey interferometry technique for detecting weak nonlinearities with trapped ions. The method relies on using the quantum Rabi model as a probe, which is sensitive to nonlinear symmetry-breaking perturbations. We show that t...

N. R. Cooper, Y. Yang, C. Weitenberg·Mar 31, 2026

Quantum gas microscopes offer unprecedented insights into quantum many-body states of cold atomic gases. Here we introduce concrete protocols for extending quantum gas microscopes to measure in phase space, by mapping momentum onto auxiliary degrees ...

Mizanur Rahaman, Mateusz Wasilewski·Mar 31, 2026

We study the structure of separable elements in bipartite C$^{\ast}$-algebras, focusing on the existence and size of a separable neighbourhood around the identity element. While this phenomenon is well understood in the finite-dimensional setting, it...

Zhijie Tang, Albert Nieto-Morales, Arit Kumar Bishwas·Mar 31, 2026

Efficiently planning container loads onto trains is a computationally challenging combinatorial optimization problem, central to logistics and supply chain management. A primary source of this complexity arises from the need to model and reduce rehan...

Folkert de Ronde, Stephan Wong, Sebastian Feld·Mar 31, 2026

Quantum computing is expected to become a foundational technology for solving problems that exceed the capabilities of classical systems. As quantum algorithms and hardware technologies continue to advance, the need for scalable architectures becomes...

Jun Ye·Mar 31, 2026

Decoherence in superconducting qubits emerges from the interplay of multilevel dynamics and structured environmental noise, yet perturbative models cannot capture all resulting signatures. Here, EmuPlat couples instruction-set-architecture-level wave...

Maria Grazia Concilio, Yiwen Wang, Siyuan Wang +1 more·Mar 31, 2026

Molecular quantum sensors represent a promising frontier for the detection of nuclear magnetic resonance signals and alternating current magnetic fields at the nanoscale, potentially reaching single-proton sensitivity. Although the triplet states of ...

Zhenhai Sun, David Feldstein-Bofill, Ksenia Shagalov +10 more·Mar 31, 2026

Superconducting transmon qubits based on hybrid superconductor-semiconductor Josephson junctions (gatemons) offer gate tunability, but their relaxation times remain well below those of state-of-the-art transmons, and the origin of this discrepancy is...

Yu Su, Yao Wang·Mar 31, 2026

Open quantum systems are traditionally described by decomposing the total Hilbert space into a system and an external environment, linked by an explicit interaction Hamiltonian. We propose an alternative framework in which the environment is not intr...

Songhuan He, Yifei Cui, Bo Liu +2 more·Mar 31, 2026

Superconducting quantum processor units (QPUs) are incapable of producing massive datasets for quantum error correction (QEC) because of hardware limitations. Thus, QEC decoders heavily depend on synthetic data from qubit error models. Classic depola...

Hiroki Isobe·Mar 31, 2026

The quantum Hall effect realizes a quantized Hall resistance $R_{xy} = h/(νe^2)$ whereas the longitudinal resistance vanishes. The quantized value consists of the fundamental physical quantities, the elementary charge $e$ and the Planck constant $h$,...

Jaroslav Kysela, Katharina Ludwig, Nitica Sakharwade +2 more·Mar 31, 2026

We define the class of register-logic graphs and prove that any uniformly deterministic measurement-based quantum computation (MBQC) where the inputs coincide with the outputs must be driven on such graphs by measurements in the $YZ$ plane of the Blo...

Yi-Han Bai, Yue Wei, Chi Zhang +2 more·Mar 31, 2026

We propose high-fidelity controlled-NOT (CNOT) gates in a hybrid system of polar molecules and Rydberg atoms based on the unconventional Rydberg pumping mechanism. By combining the rich internal structure of polar molecules with the strong dipole-dip...

Jeonghyeok Park, Hyukjoon Kwon, Hyunseok Jeong·Mar 31, 2026

We investigate the distribution of entanglement entropy in hybrid quantum circuits consisting of random unitary gates and local measurements applied at a finite rate. We demonstrate that higher moments of the entanglement entropy distribution, such a...

Yuya Kano, Yohei Kawakami, Shumpei Masuda +8 more·Mar 31, 2026

We experimentally investigate how interactions between Kerr parametric oscillators (KPOs) degrade their bit-flip times, where a bit flip is defined as a transition between the two degenerate ground states of a KPO. Interactions between KPOs cause qua...

Fang-Yu Hong·Mar 31, 2026

We present a theoretical proposal for a hybrid solid-state quantum node based on a single nitrogen-vacancy (NV) center coupled to a topological single-walled carbon nanotube (SWCNT) plasmonic microtoroid. The SWCNT ring supports deeply sub-wavelength...

Sebastian Grieninger, Dmitri E. Kharzeev, Eliana Marroquin·Mar 31, 2026

We compute the entanglement entropy and the entanglement spectrum of the vacuum state in the massive Schwinger model at a finite $θ$ angle. The $θ$ term is implemented through a chirally rotated lattice Hamiltonian that preserves the periodicity in $...

Dharmesh Jain·Mar 31, 2026

We uncover an inconsistency in the uniform WKB quantization of deformed quantum mechanics.

Thomas Huffstutler, Upendra Kapshikar, David Miloschewsky +1 more·Mar 31, 2026

We study when partial Boolean functions can (and cannot) exhibit superpolynomial quantum query speedups, and develop a general framework for ruling out such speedups via two complementary lenses: promise-aware complexity measures and function complet...