University of Warsaw

Exact dimer ground states of long-range spin chains and ladders

Interacting spin chains and ladders are known to support a plethora of quantum phases withcomplex ground-state phase diagrams. In this work, we study a large family of such models anddetermine precise, explicit conditions under which an exact dimer state is guaranteed to be thegr...

Exact dimer ground states of long-range spin chains and ladders

Interacting spin chains and ladders are known to support a plethora of quantum phases withcomplex ground-state phase diagrams. In this work, we study a large family of such models anddetermine precise, explicit conditions under which an exact dimer state is guaranteed to be thegr...

Ecological and Quality Conditions for Children’s Participation as a Right in Early Childhood Education and Care

Abstract Providing space for children’s voices to be heard, listening to their ideas and giving due weight to their propositions, on all matters that affect them, describes the concept of participation rights according to the United Nations Convention of the Rights of the Child....

Identification of a nanosecond isomer of $$^{164}$$Tb

Abstract This letter reports on the identification of a new isomeric state of $$^{164}$$ 164 Tb ( $$Z=65$$ Z = 65 , $$N=99$$ N = 99 ), which was measured with the DESPEC setup at the GSI Helmholtzzentrum für Schwerionenforschung GmbH following the first relativistic fragmentation...

Free-particle Green’s function matrix elements over spherical Gaussian and plane-wave-modulated Gaussian basis functions

Free-particle Green's function plays a central role in the theoretical description of electron scattering and autoionization processes in quantum physics and chemistry. Recently, Gaussian basis set approaches have become increasingly important in applications to unbound and metas...

The physicochemical design, structure and permeability of the JCVI-syn3A minimal cell membrane

Abstract Minimal cells offer a platform to uncover the fundamental physicochemical principles of cellular life. While genomes, proteomes and metabolic networks of cells have been elucidated, the lipidome, which determines the physicochemical identity of the membrane, remains larg...

Low depth unitary coupled cluster algorithm for large chemical systems

The unitary coupled cluster (UCC) algorithm is one of the most promising implementations of the variational quantum eigensolver for quantum computers. However, for large systems, the number of UCC factors leads to deep quantum circuits, which are prohibitive for execution on quan...

The promise of self-supervised and active learning for Strong Lens discovery: Astronomaly applied to KiDS

Abstract Strong gravitational lenses (SGLs) are rare systems whose discovery currently relies primarily on supervised machine learning methods trained on large simulated datasets. We present the first application of Astronomaly:PROTEGE to SGL discovery, demonstrating that a human...

Closing the Objectivity Loophole in Bell Tests on a Public Quantum Computer

ABSTRACT We have constructed and run a Bell test of local realism focusing on the objectivity criterion. Objectivity means that the outcomes are macroscopically confirmed by a few observers at each party. The IBM Quantum and IonQ devices turn out to be sufficiently accurate to pa...

Coupling opinion dynamics and epidemiology

Abstract This research investigates the coupled dynamics of behavior and infectious disease using a mathematical model. We integrate a two-state q -voter opinion process with SIS-type infection dynamics, where transmission rates are influenced by opinion, and an infection-induced...

Variable high-contrast all-optical self-switching of femtosecond solitonic pulses in multi-dual-core optical fiber with distributed optical asymmetry

Abstract Effective alloptical selfswitching of Cband femtosecond pulses, driven by pulse energy in a nonlinear fiber coupler, was experimentally investigated. A key contribution of this work is the detailed analysis of optical asymmetry between the two fiber cores influencing the...

Who else cares? A conceptualization of non-investor and non-workforce perspectives on downsizing

Abstract Economic downturns, technological change, and increasing cost pressure are shaping a business environment marked by uncertainty, which manifests in various ways, including extensive downsizing measures in the form of headcount reductions. Given the far-reaching social an...

Synthetic Anionophores Enhance the Activity of Anionic Drugs

Lipid bilayers pose a major barrier to the passive diffusion of anionic species, including many carboxylate-containing drugs. This limited membrane permeability can reduce drug efficacy and allow bacteria to deploy various defense mechanisms. In this study, we show that small syn...

Biochemical aspects of aluminum tolerance in triticale (× Triticosecale Wittmack)

Aluminum (Al) toxicity severely restricts root growth and crop productivity in acidic soils. Despite the agronomic relevance of triticale (× Triticosecale Wittmack) in Europe, the biochemical basis of Al tolerance remains incompletely understood. Here, we combined physiological s...

From amino acids to animal models: MAP2K2 mutations and their role in pathogenesis of CFC4 Syndrome

Abstract Background Cardio-facio-cutaneous syndrome type 4 (CFC4) is a rare RASopathy caused by germline mutations in the MAP2K2 gene, which encodes the MEK2 protein - a key kinase in the Ras/MAPK signaling pathway. Although the Ras/MAPK cascade has been widely studied due to its...

From Leaves to Roots: Seasonal Dynamics of Wild Boar (Sus scrofa) Use of Understory Plant Resources in a Forest–Agricultural Landscape of Central Poland

Wild boars (Sus scrofa) forage on plant resources located both above and below the soil surface, but it remains unclear whether these resources are exploited simultaneously or used as complementary food pools according to season. This study examined seasonal changes in the use of...

Evidence for long-distance contacts at the turn of eras: A leontomorphic fibula from Kuyavia (Poland). A contribution to the study on the European family of lion-bow fibulae

Abstract Located in the North European Plain and the heart of the Polish lands, the historic region of Kuyavia has long been an area where cultural communication and trade routes criss-crossed. This geographical characteristic had transformative effects on the region’s inhabitant...

Self-consistent vertex corrected GW with static and dynamic screening using tensor hypercontraction: Assessment of molecular charged excitations

We investigate self-consistent vertex corrections to the GW self-energy for ionization potentials (IPs) and electron affinities (EAs). We benchmark IPs against ΔCCSD(T) references in the G0W0Γ29 and GW100 sets and compare GW100 EAs with EOM-CCSD references. Because many anions ar...

Infrared absorption spectroscopy of a single polyatomic molecular ion

Abstract Absorption spectroscopy is a fundamental tool for probing molecular structure 1 . However, performing absorption spectroscopy on individual molecules is challenging because of the low signal-to-noise ratio 2,3 . Here we report on non-destructive absorption spectroscopy o...

Academic mobility and identity in transition: comparative insights from multilingual scholars across higher educational systems

Purpose This paper aims to examine how bi- and multilingual academics reconstruct professional identities during international mobility and how they exercise agency in relation to language hierarchies, institutional expectations, and belonging across higher education systems. Des...