87 citations · 642 across the 37 of their papers we have counts for
37 papers
Few-body perspective on fermionic pairing in one spatial dimension
Tomasz Sowiński
In this perspective we discuss recent theoretical and experimental concepts giving a route to a better understanding of conventional and unconventional pairing mechanisms between o…
Unconventional pairing in few-fermion systems tuned by external confinement
Jacek Dobrzyniecki, Giuliano Orso, Tomasz Sowiński
We study the ground-state properties of a two-component one-dimensional system of a few ultra-cold fermions with attractive interactions. We show that, by ramping up an external po…
Dynamical resistivity of a few interacting fermions to the time-dependent potential barrier
Dillip K. Nandy, Tomasz Sowiński
We study the dynamical response of a harmonically trapped two-component few-fermion mixture to the external gaussian potential barrier moving across the system. The simultaneous ro…
Pauli crystals -- interplay of symmetries
Mariusz Gajda, Jan Mostowski, Maciej Pylak +2
Recently observed Pauli crystals are structures formed by trapped ultracold atoms with the Fermi statistics. Interactions between these atoms are switched off, so their relative po…
Two Rydberg-dressed atoms escaping from an open well
Jacek Dobrzyniecki, Tomasz Sowiński
A comprehensive analysis of the dynamics of two Rydberg-dressed particles (bosons or fermions) tunneling from a potential well into open space is provided. We show that the dominan…
Correlations in few two-component quantum walkers on a tilted lattice
Saubhik Sarkar, Tomasz Sowiński
We study the effect of inter-component interactions on the dynamical properties of quantum walkers. We consider the simplest situation of two indistinguishable non-interacting walk…
Variational ansatz for -wave fermions confined in a one-dimensional harmonic trap
Przemysław Kościk, Tomasz Sowiński
We propose a very accurate and efficient variational scheme for the ground state of the system of -wave attractively interacting fermions confined in a one-dimensional harmonic…
Simulating artificial one-dimensional physics with ultra-cold fermionic atoms: three exemplary themes
Jacek Dobrzyniecki, Tomasz Sowiński
For over twenty years, ultra-cold atomic systems have formed an almost perfect arena for simulating different quantum many-body phenomena and exposing their non-obvious and very of…
Capturing non-exponential dynamics in the presence of two decay channels
Francesco Giacosa, Przemysław Kościk, Tomasz Sowiński
The most unstable quantum states and elementary particles possess more than a single decay channel. At the same time, it is well known that typically the decay law is not simply ex…
Dynamical properties of a few mass-imbalanced ultra-cold fermions confined in a double-well potential
Dillip K. Nandy, Tomasz Sowiński
A comprehensive analysis of the exact unitary dynamics of two-component mass-imbalanced fermions in a one-dimensional double-well potential is accomplished by considering the total…
Unconventional pairing in one-dimensional systems of a few mass-imbalanced ultracold fermions
Patrycja Łydżba, Tomasz Sowiński
We study the ground-state properties of a two-component fermionic mixture effectively confined in a one-dimensional harmonic trap. We consider scenarios when numbers of particles i…
Signatures of unconventional pairing in spin-imbalanced one-dimensional few-fermion systems
Daniel Pęcak, Tomasz Sowiński
A system of a few attractively interacting fermionic Li atoms in one-dimensional harmonic confinement is investigated. Non-trivial inter-particle correlations induced by intera…
Geometry-induced entanglement in a mass-imbalanced few-fermion system
Damian Włodzyński, Daniel Pęcak, Tomasz Sowiński
Many-body systems undergoing quantum phase transitions reveal substantial growth of non-classical correlations between different parties of the system. This behavior is manifested…
Efficient construction of many-body Fock states having the lowest energies
Andrzej Chrostowski, Tomasz Sowiński
To perform efficient many-body calculations in the framework of the exact diagonalization of the Hamiltonian one needs an appropriately tailored Fock basis built from the single-pa…
Intercomponent correlations in attractive one-dimensional mass-imbalanced few-body mixtures
Daniel Pęcak, Tomasz Sowiński
Ground-state properties of a few attractively interacting ultra-cold atoms of different mass confined in a one-dimensional harmonic trap are studied in terms of the correlation noi…
Variational approach for interacting ultra-cold atoms in arbitrary one-dimensional confinement
Przemysław Kościk, Marcin Płodzień, Tomasz Sowiński
Standard analytical construction of the many-body wave function of interacting particles in one dimension, beyond mean-field theory, is based on the Jastrow approach. The many-body…
Dynamics of a few interacting bosons escaping from an open well
Jacek Dobrzyniecki, Tomasz Sowiński
The dynamics of a few ultra-cold bosons tunneling from a one-dimensional potential well into open space is studied. In such a system several decay channels can be distinguished, ea…
Few-fermion thermometry
Marcin Płodzień, Rafał Demkowicz-Dobrzański, Tomasz Sowiński
Potential realization of a quantum thermometer operating in the nanokelvin regime, formed by a few-fermionic mixture confined in a one-dimensional harmonic trap, is proposed. Therm…
Numerically exact approach to few-body problems far from a perturbative regime
Marcin Płodzień, Dariusz Wiater, Andrzej Chrostowski +1
Recent developments of experimental techniques in the field of ultra-cold gases open a path to study the crossover from 'few' to 'many' on the quantum level. In this case, accurate…
Ground-State Magnetization in Mixtures of a Few Ultra-Cold Fermions in One-Dimensional Traps
Tomasz Sowiński
Ground-state properties of a few spin- ultra-cold fermions confined in a one-dimensional trap are studied by the exact diagonalization method. In contrast to previous studies,…
Global optimization for quantum dynamics of few-fermion systems
Xikun Li, Daniel Pęcak, Tomasz Sowiński +2
Quantum state preparation is vital to quantum computation and quantum information processing tasks. In adiabatic state preparation, the target state is theoretically obtained with…
Effective three-body interactions for bosons in a double-well confinement
Jacek Dobrzyniecki, Xikun Li, Anne E. B. Nielsen +1
When describing the low-energy physics of bosons in a double-well potential with a high barrier between the wells and sufficiently weak atom-atom interactions, one can to a good ap…
Effective two-mode description of a few ultra-cold bosons in a double-well potential
Jacek Dobrzyniecki, Tomasz Sowiński
We present a construction of an improved two-mode model for modeling the dynamics of interacting ultra-cold bosons confined in a one-dimensional double well trap. Unlike in the typ…
Two bosonic quantum walkers in one-dimensional optical lattices
Dariusz Wiater, Tomasz Sowiński, Jakub Zakrzewski
Dynamical properties of two bosonic quantum walkers in a one-dimensional lattice are studied theoretically. Depending on the initial state, interactions, lattice tilting, and latti…