Papers
Geometry-induced correlated noise in qLDPC syndrome extraction
Angelo Di Bella·Apr 1, 2026
With code and syndrome-extraction schedule fixed, can routed geometry alone change the correlated fault model enough to impact logical performance? Starting from a geometry-conditioned same-tick interaction Hamiltonian, we derive a controlled retaine...
The effect of staggered nonlinearity on the Su-Schrieffer-Heeger model
Ahmed Alharthy, RW Bomantara·Apr 1, 2026
We investigate the spectral properties of the Su-Schrieffer-Heeger (SSH) model with sublattice-dependent onsite nonlinearity. Two complementary approaches are employed in our studies. First, Bloch state solutions under periodic boundary conditions ar...
Vibrationally Induced Resonances in Lasing
Kai Müller, Kimmo Luoma, Christian Schäfer·Apr 1, 2026
Optical circuits and light sources, such as lasers, undergo continuous miniaturization. In its extreme, nanolasers might be comprised of only a few molecules confined in plasmonic nanoresonators. Few-emitter lasers promise low energy requirements and...
Tunable information insulation induced by constraint mismatch
Akshay Panda, Anwesha Chattopadhyay·Apr 1, 2026
We study a composite model of two $1D$ $PXP$ chains with dual constraints, forming a junction that acts as an infinite kinematic barrier to quantum information exchange. Moreover, the hard wall at the junction which acts as a perfect reflector, preve...
Nonlinearity-Induced Thouless Pumping in Quasiperiodic Lattices
Xiao-Xiao Hu, Dun Zhao, Hong-Gang Luo·Apr 1, 2026
Nonlinear Thouless pumping has been established in periodic lattices; its counterpart in quasiperiodic lattices remains unexplored. Here, we show a nonlinear topological pumping of gap solitons in quasiperiodic lattices where the local nonlinear self...
When level repulsion fails: non-normality and chaos in open quantum systems
Caio B. Naves, Thomas Klein Kvorning, Jonas Larson·Mar 31, 2026
For Hamiltonian systems, level statistics provide a faithful diagnostic of quantum chaos. By analogy, the statistics of the Lindbladian spectrum are often used in open quantum systems, and the Grobe-Haake-Sommers conjecture proposes that systems with...
The time of arrival problem in the Page-Wootters formalism
Niyusha Hosseini, Maximilian P. E. Lock·Mar 31, 2026
The time-of-arrival problem asks for the probability distribution for when a quantum particle reaches a specified location. It has been the subject of decades of debate, exemplifying the lack of a self-adjoint time observable in quantum theory. In th...
LO-Free Phase and Amplitude Recovery of an RF Signal with a DC-Stark-Enabled Rydberg Receiver
Vladislav Katkov, Nikola Zlatanov·Mar 31, 2026
We present a theoretical framework for recovering the amplitude and carrier phase of a single received RF field with a Rydberg-atom receiver, without injecting an RF local oscillator (LO) into the atoms. The key enabling mechanism is a static DC bias...
Dynamics of entanglement entropy for a locally monitored lattice gauge theory
Nisa Ara, Arpan Bhattacharyya, Nilachal Chakrabarti +2 more·Mar 31, 2026
The $1+1$ dimensional $Z_2$ gauge theory is the simplest model that allows for quantum computation or quantum simulation to probe the fundamental aspects of a gauge theory coupled with dynamical fermions. To reliably benchmark such a system, it is cr...
High-Order Perfect Absorption in the Absence of Exceptional Point
Huisheng Xu, Luojia Wang, Luqi Yuan +1 more·Mar 31, 2026
High-order perfect absorption of coherent input has recently attracted significant attention due to its broadband absorption capacity. However, the realization of a high-order perfect absorber relies on the exceptional point (EP) to coalesce the scat...
Optimal Control of Spin Squeezing in 2D Finite-Range Interacting Systems
Ang Li, Ling-Na Wu, Li You·Mar 31, 2026
Spin squeezing serves as both a fundamental witness of quantum entanglement and a critical resource for quantum-enhanced metrology. While generating substantial spin squeezing in finite-range interacting systems remains challenging, such capability i...
On the Entanglement Entropy Distribution of a Hybrid Quantum Circuit
Jeonghyeok Park, Hyukjoon Kwon, Hyeonseok 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...
Change in bit-flip times of Kerr parametric oscillators caused by their interactions
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...
Testing classical-quantum gravity with geodesic deviation
Tomoya Hirotani, Akira Matsumura·Mar 31, 2026
A novel semiclassical gravity model proposed by Oppenheim et al., that consistently describes interactions between quantum systems and a classical gravitational field, has recently attracted considerable attention. However, the limitations and phenom...
Zeno-Constrained Formation of Relativistic Mass Shells
Ansgar Pernice·Mar 30, 2026
We study an extension of the quantum linear Boltzmann equation describing irreversible momentum-space dynamics of an open quantum system under strong continuous monitoring. The monitored observable is taken to be a quadratic form in an extended, pure...
Effects of measurements on entanglement dynamics for $1+1$D $\mathbb Z_2$ lattice gauge theory
Nilachal Chakrabarti, Nisa Ara, Neha Nirbhan +2 more·Mar 30, 2026
The $1+1$ dimensional $\mathbb Z_2$ gauge theory is the simplest model that allows for quantum simulation to probe the fundamental aspects of a gauge theory coupled with dynamical fermions. To reliably benchmark such a system, it is crucial to unders...
Quantized Dissipation from the Inverse-Square Anomaly in a Non-Hermitian Klein-Gordon Field
Mansour Haghighat, Ali Nouri·Mar 30, 2026
We construct an exactly solvable relativistic model that embeds the anomalous inverse-square interaction into a non-Hermitian Klein-Gordon field theory through a purely imaginary, scale-invariant scalar potential. The stationary field equation reduce...
Quantum engineering with ultracold polar molecules using trap-induced resonances
Sakthikumaran Ravichandran, Piotr Kulik, Krzysztof Jachymski·Mar 30, 2026
Polar molecules represent a promising platform for quantum simulation and computation protocols. Highly controllable arrays of optical tweezers are now accessible in experiments, allowing for unprecedented control of individual molecules. Motional de...
Enhancing Spin Coherence of Optically-Addressed Molecular Qubit by Nuclear Spin Hyperpolarization
Boning Li, Patrick Hautle, Duhan Zhang +6 more·Mar 29, 2026
Optically addressable molecular triplet spins provide a chemically tunable platform for quantum application, but their coherence is often limited by interactions with surrounding spin baths. Here we demonstrate controlled suppression of nuclear-bath-...
A Helmholtz Equation for Surface Plasmon Polaritons on Curved Interfaces: Controlling Cooperativity with Geometric Potentials
Florian Bönsel, Flore K. Kunst·Mar 29, 2026
Surface plasmon polaritons propagating along curved metal-dielectric interfaces experience geometry-induced modifications absent on flat surfaces. In this work, we derive a covariant, effective two-dimensional wave equation for the transverse magneti...