Research works

Twist-Induced Out-of-Plane Ferroelectricity in Bilayer Hafnia

Abstract Ferroelectric HfO2 is a promising candidate for next-generation memory devices due to its CMOS compatibility and ability to retain polarization at nanometer scales. However, the polar orthorhombic phase responsible for ferroelectricity is metastable and requires extrinsi...

Structural control of two-level defect density revealed by high-throughput correlative measurements of Josephson junctions

Materials defects in Josephson junctions (JJs), often referred to as two-level systems (TLS), couple to superconducting qubits and are a critical bottleneck for scalable quantum processors. Despite their importance, understanding the microscopic sources of TLS and how to mitigate...

Self-resonance preheating in deformed attractor models: Oscillon formation and evolution

It is well known that, in potentials that are quadratic near the minimum but shallower away, such as small $α$ ($\ll M_P^2$) attractors, the inflaton condensate fragments into localized compact objects known as oscillons during self-resonance preheating. In this work we investiga...

Quantifying the Spin–Optical Properties of Bent π-Carbene Molecular Qubits

Abstract Through spin-selective intersystem crossings (ISCs) among photoexcited electronic states, organic π-diradicals can be spin-polarized by optical excitation, positioning them as long-lived, tunable, and scalable qubits. Recent advancements have utilized triplet π-carbenes...

In-flight receiver calibration of the Ganymede Laser Altimeter (GALA) by passive Earth observations

Abstract. Post-launch characterization of the receiver telescope of the laser altimeter is essential for achieving precise georeferenced planetary measurements and for radiometric calibration to passively measure surface reflectance. For the Ganymede Laser Altimeter (GALA) aboard...

Finite-size corrections to the crosscap overlap in the two-dimensional Ising model

We analyze the finite-size corrections to the crosscap overlap in the two-dimensional classical Ising model along its self-dual critical line. Using a fermionic formulation, we express the lattice crosscap overlap in terms of Bogoliubov angles and develop a contour-integral appro...

Missing digits and sums of two prime squares

Abstract We investigate integers whose base g expansion omits a fixed digit and which can be represented as a sum of two prime squares. In the first part of the paper, we apply the Hardy–Littlewood circle method to obtain asymptotic formulas for weighted count of representations...

Hypertension detection, treatment and control in young adults in Australia

Young adult hypertension increases risk of future cardiovascular disease but is often overlooked. We aimed to identify opportunities to reduce blood pressure among younger adults by determining the drivers of hypertension detection, treatment and control in young adults in Austra...

Closing the Gap in Maternal Healthcare in Nigeria: Are Women with Low Socioeconomic Status Still Left Behind?

Despite global and national efforts to improve maternal health, Nigeria continues to record high maternal mortality rates, primarily driven by the underutilization of essential maternal health services. This study examines the association between women’s socioeconomic status (SES...

Benchmarking deep learning-based reconstruction methods for photoacoustic computed tomography with clinically relevant synthetic datasets

Deep learning (DL)-based image reconstruction methods for photoacoustic computed tomography (PACT) have developed rapidly in recent years. However, most existing methods have not employed standardized datasets, and their evaluations rely on traditional image quality (IQ) metrics...

Low-resource quantum energy gap estimation via randomization

Estimating the energy spectra of quantum many-body systems is a fundamental task in quantum physics, with applications ranging from chemistry to condensed matter. Algorithmic shadow spectroscopy is a recent method that leverages randomized measurements on time-evolved quantum sta...

Inverse stochastic control via generalized Schrödinger problems

We propose a variational formulation of an inverse problem in continuous-time stochastic control, aimed at identifying control costs consistent with a given distribution over trajectories. The formulation is based on minimizing the suboptimality gap of observed behavior. We estab...

REAMP: a stochastic resonance approach for multi-change point detection in high-dimensional data

Detecting multiple structural breaks in high-dimensional data remains a challenge, particularly when changes occur in higher-order moments or within complex manifold structures. In this paper, we propose REAMP (Resonance-Enhanced Analysis of Multi-change Points), a novel framewor...

Data-Driven Reduced-Complexity Modeling of Fluid Flows: A Community Challenge

We introduce a community challenge designed to facilitate direct comparisons between data-driven methods for compression, forecasting, and sensing of complex aerospace flows. The challenge is organized into three tracks that target these complementary capabilities: compression (c...

Critical aging and relaxation dynamics in long-range systems

We study the dynamical scaling of long-range $\mathrm{O}(N)$ models after a sudden quench to the critical temperature, using the functional renormalization group approach. We characterize both short-time aging and long-time relaxation as a function of the symmetry index $N$, the...

Distributed Delay Stabilizes Bistable Genetic Networks

Delay is an inherent feature of genetic regulatory networks. It represents the time required for the assembly of functional regulator proteins. The protein production process is complex, as it includes transcription, translocation, translation, folding, and oligomerization. Becau...

SUBALTERN VOICES AND COLONIAL DESIRE: RECLAIMING THE NYAI’S AGENCY IN INDONESIAN COLONIAL LITERATURE

This study examines the Nyai—a concubine figure situated at the intersection of colonial power, patriarchy, and racial hybridity—in Indonesian colonial literature. It offers a paired reading of Nyai Ontosoroh in Pramoedya Ananta Toer’s Bumi Manusia and Nyi Sadikem in Artie Ahmad’...

Evaluating the roles of testosterone and sex-linked genes in territorial aggression of sex-reversed XY females in the African pygmy mouse

Sex differences in social aggression are widespread across the animal kingdom, with males typic-ally displaying greater territoriality. While this dimorphism has traditionally been attributed to sex hormones, sex chromosomes can also contribute to it independently of hormonal inf...

Bell inequality violation with vacuum--one-photon number superposition states

Entanglement is a central resource in quantum technologies, and the realization of photonic entanglement necessarily relies on interaction with matter. Resonance fluorescence (RF), originating from the coherent interaction between a driving field and a two-level system, plays a p...

A fast and frugal Gaussian boson sampling emulator

Classical algorithms have successfully reproduced expectation values of observables for certain quantum circuits using off-the-shelf computing resources; however, matching the performance of the most advanced quantum devices on sampling problems typically incurs extreme memory an...