128 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Slovak Academy of SciencesSK82 papers
- Institute of Physics of the Slovak Academy of SciencesSK60 papers
- Masaryk UniversityCZ16 papers
- Comenius University BratislavaSK13 papers
- Centre National de la Recherche ScientifiqueFR10 papers
- Université Paris-SudFR8 papers
- Institute of Inorganic Chemistry of the Slovak Academy of SciencesSK7 papers
- Slovak University of Technology in BratislavaSK6 papers
- Laboratoire de Physique Théorique et Modèles StatistiquesFR5 papers
- Czech Academy of Sciences, Institute of Physics of MaterialsCZ4 papers
- Institute of Electrical Engineering of the Slovak Academy of SciencesSK4 papers
- Laboratoire de Physique ThéoriqueFR4 papers
32 papers · 1 filter
Efficient implementation of single particle Hamiltonians in exponentially reduced qubit space
Martin Plesch, Martin Friák, Ijaz Ahamed Mohammad
Current and near-term quantum hardware is constrained by limited qubit counts, circuit depth, and the high cost of repeated measurements. We address these challenges for solid stat…
Characterisation of individual gates using twirling circuits
David Amaro-Alcalá
We present a method to characterise qubit gates. Utilising the supermap formalism, we create a scheme for deterministic single-qubit gate analysis. Our approach introduces a new tw…
Advantages of quantum communication revealed by the reexamination of hyperbit theory limitations
Giovanni Scala, Seyed Arash Ghoreishi, Marcin Pawłowski
Pawłowski and Winter's hyperbit theory, proposed in 2012, presented itself as an alternative to quantum theory, suggesting novel ways of redefining entanglement and classical commu…
Universal validity of the second law of information thermodynamics
Shintaro Minagawa, M. Hamed Mohammady, Kenta Sakai +2
Adiabatic measurements, followed by feedback and erasure protocols, have often been considered as a model to embody Maxwell's Demon paradox and to study the interplay between therm…
Resource-efficient utilization of quantum computers
Ijaz Ahamed Mohammad, Matej Pivoluska, Martin Plesch
The current state of quantum computing is commonly described as the Noisy Intermediate-Scale Quantum era. Available computers contain a few dozens of qubits and can perform a few d…
Pauli component erasing quantum channels
Jose Alfredo de Leon, Alejandro Fonseca, Francois Leyvraz +2
Decoherence of quantum systems is described by quantum channels. However, a complete understanding of such channels, especially in the multi-particle setting, is still an ongoing d…
Quantum dynamics is not strictly bidivisible
David Davalos, Mario Ziman
We address the question of the existence of quantum channels that are divisible in two quantum channels but not in three or, more generally, channels divisible in but not in $n…
Isolating noise and amplifying signal with quantum Cheshire cat
Ahana Ghoshal, Soham Sau, Debmalya Das +1
The so-called quantum Cheshire cat is a phenomenon in which an object, identified with a "cat", is dissociated from a property of the object, identified with the "grin" of the cat.…
Implementation of quantum compression on IBM quantum computers
Matej Pivoluska, Martin Plesch
Advances in development of quantum computing processors brought ample opportunities to test the performance of various quantum algorithms with practical implementations. In this pa…
Best-practice aspects of quantum-computer calculations: A case study of hydrogen molecule
Ivana Miháliková, Martin Friák, Matej Pivoluska +3
Quantum computers are reaching one crucial milestone after another. Motivated by their progress in quantum chemistry, we have performed an extensive series of simulations of quantu…
The Cost of Improving the Precision of the Variational Quantum Eigensolver for Quantum Chemistry
Ivana Miháliková, Matej Pivoluska, Martin Plesch +3
Quantum computing brings a promise of new approaches into computational quantum chemistry. While universal, fault-tolerant quantum computers are still not available, we want to uti…
Measurement disturbance and conservation laws in quantum mechanics
M. Hamed Mohammady, Takayuki Miyadera, Leon Loveridge
Measurement error and disturbance, in the presence of conservation laws, are analysed in general operational terms. We provide novel quantitative bounds demonstrating necessary con…
Geometric Bloch Vector Solution to Minimum Error Discriminations of Mixed Qubit States
Mahdi Rouhbakhsh N., Seyed Arash Ghoreishi
We investigate minimum-error (ME) discrimination for mixed qubit states using a geometric approach. By analyzing positive operator-valued measure (POVM) solutions and introducing L…
Bloch sphere analog of qudits using Heisenberg-Weyl Operators
Gautam Sharma, Sibasish Ghosh, Sk Sazim
We study an analogous Bloch sphere representation of higher-level quantum systems using the Heisenberg-Weyl operator basis. We introduce a parametrization method that will allow us…
Self-consistency of the two-point energy measurement protocol
M. Hamed Mohammady
A thermally isolated quantum system undergoes unitary evolution by interacting with an external work source. The two-point energy measurement (TPM) protocol defines the work exchan…
Finite-Function-Encoding Quantum States
Paul Appel, Alexander J. Heilman, Ezekiel W. Wertz +4
We introduce finite-function-encoding (FFE) states which encode arbitrary -valued logic functions, i.e., multivariate functions over the ring of integers modulo , and investi…
General measurements with limited resources and their application to quantum unambiguous state discrimination
Daniel Reitzner, Jan Bouda
In this report, we present a framework for implementing an arbitrary -outcome generalized quantum measurement (POVM) on an -qubit register as a sequence of two-outcome measur…
Divisibility of quantum dynamical maps and collision models
S. N. Filippov, J. Piilo, S. Maniscalco +1
Divisibility of dynamical maps is visualized by trajectories in the parameter space and analyzed within the framework of collision models. We introduce ultimate completely positive…
New quantum number for the many-electron Dirac-Coulomb Hamiltonian
Stanislav Komorovsky, Michal Repisky, Lukáš Bučinský
By breaking the spin symmetry in the relativistic domain, a powerful tool in physical sciences was lost. In this work, we examine an alternative of spin symmetry for systems descri…
Simulating long-distance entanglement in quantum spin chains by superconducting flux qubits
Stefano Zippilli, Miroslav Grajcar, Evgeni Il'ichev +1
We investigate the performance of superconducting flux qubits for the adiabatic quantum simulation of long distance entanglement (LDE), namely a finite ground-state entanglement be…
Perturbative gadgets without strong interactions
Yudong Cao, Daniel Nagaj
Perturbative gadgets are used to construct a quantum Hamiltonian whose low-energy subspace approximates a given quantum -body Hamiltonian up to an absolute error . Typically,…
Optimal single shot strategies for discrimination of quantum measurements
Michal Sedlak, Mario Ziman
We study discrimination of m quantum measurements in the scenario when the unknown measurement with n outcomes can be used only once. We show that ancilla-assisted discrimination p…
Two Notes on Grover's Search: Programming and Discriminating
Daniel Reitzner, Mario Ziman
In this work we address two questions concerning Grover's algorithm. In the first we give an answer to the question how to employ Grover's algorithm for actual search over database…
Entanglement sensitivity to signal attenuation and amplification
Sergey N. Filippov, Mario Ziman
We analyze general laws of continuous-variable entanglement dynamics during the deterministic attenuation and amplification of the physical signal carrying the entanglement. These…