Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Pavešič, Luka"'
We benchmark simulations of many-body quantum systems on heterogeneous hardware platforms using CPUs, GPUs, and TPUs. We compare different linear algebra backends, e.g., numpy versus the torch, jax, or tensorflow library, as well as a mixed-precision
Externí odkaz:
http://arxiv.org/abs/2409.03818
We investigate the dynamics of the quantum Ising model on two-dimensional square lattices up to $16 \times 16$ spins. In the ordered phase, the model is predicted to exhibit dynamically constrained dynamics, leading to confinement of elementary excit
Externí odkaz:
http://arxiv.org/abs/2406.11979
Autor:
Pavešić, Luka, Žitko, Rok
We solve the problem of an interacting quantum dot embedded in a Josephson junction between two superconductors with finite charging energy described by the transmon (Cooper pair box) Hamiltonian. The approach is based on the flat-band approximation
Externí odkaz:
http://arxiv.org/abs/2402.02118
Publikováno v:
Phys. Rev. B 108, 115160 (2023)
We present a theoretical study of a system consisting of a superconducting island and two quantum dots, a possible platform for building qubits and Cooper pair splitters, in the regime where each dot hosts a single electron and, hence, carries a magn
Externí odkaz:
http://arxiv.org/abs/2306.16211
Autor:
Saldaña, Juan Carlos Estrada, Pavešič, Luka, Vekris, Alexandros, Grove-Rasmussen, Kasper, Nygård, Jesper, Žitko, Rok
Publikováno v:
Phys. Rev. B 108, 224507 (2023)
An epitaxial semiconductor-superconductor nanowire is a superconducting system with a complex level structure originating from hybridization: in addition to a dense set of higher-energy states derived predominantly from the metallic superconducting s
Externí odkaz:
http://arxiv.org/abs/2306.06001
We consider an interacting quantum dot strongly coupled to two superconducting leads in a Josephson junction geometry. By defining symmetry-adapted superpositions of states from the leads, we formulate an effective Hamiltonian for the strong-hybridis
Externí odkaz:
http://arxiv.org/abs/2304.12456
Publikováno v:
SciPost Phys. 15, 070 (2023)
Spectroscopy of a Josephson junction device with an embedded quantum dot reveals the presence of a contribution to level splitting in external magnetic field that is proportional to $\cos \phi$, where $\phi$ is the gauge-invariant phase difference ac
Externí odkaz:
http://arxiv.org/abs/2212.07185
Autor:
Malinowski, Filip K., Rupesh, R. K., Pavešić, Luka, Guba, Zoltán, de Jong, Damaz, Han, Lin, Prosko, Christian G., Chan, Michael, Liu, Yu, Krogstrup, Peter, Pályi, András, Žitko, Rok, Koski, Jonne V.
We study a hybrid device defined in an InAs nanowire with an epitaxial Al shell that consists of a quantum dot in contact with a superconducting island. The device is electrically floating, prohibiting transport measurements, but providing access to
Externí odkaz:
http://arxiv.org/abs/2210.01519
Autor:
Žitko, Rok, Pavešić, Luka
We study the subgap Yu-Shiba-Rusinov (YSR) states in the Richardson's model of a superconductor with a magnetic impurity for different electron pairing strengths from the weak-coupling Bardeen-Cooper-Schrieffer (BCS) regime to the strong-coupling Bos
Externí odkaz:
http://arxiv.org/abs/2204.12610
Autor:
Saldaña, Juan Carlos Estrada, Vekris, Alexandros, Pavešič, Luka, Žitko, Rok, Grove-Rasmussen, Kasper, Nygård, Jesper
Condensed matter is composed of a small set of identical units, yet it shows an immense range of behaviour. Recently, an array of cold atoms was used to generate long-range quantum entanglement, a property of topological matter. Another approach to s
Externí odkaz:
http://arxiv.org/abs/2203.00104