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pro vyhledávání: '"Reitzner, Daniel"'
Current quantum computers have the potential to overcome classical computational methods, however, the capability of the algorithms that can be executed on noisy intermediate-scale quantum devices is limited due to hardware imperfections. Estimating
Externí odkaz:
http://arxiv.org/abs/2308.07664
Publikováno v:
Phys. Rev. A 107, 032612 (2023)
Before the availability of large scale fault-tolerant quantum devices, one has to find ways to make the most of current noisy intermediate-scale quantum devices. One possibility is to seek smaller repetitive hybrid quantum-classical tasks with higher
Externí odkaz:
http://arxiv.org/abs/2209.05338
Autor:
Reitzner, Daniel, Bouda, Jan
Publikováno v:
Quantum Inf Process 23, 268 (2024)
In this report, we present a framework for implementing an arbitrary $n$-outcome generalized quantum measurement (POVM) on an $m$-qubit register as a sequence of two-outcome measurements requiring only single ancillary qubit. Our procedure offers a p
Externí odkaz:
http://arxiv.org/abs/2009.05276
Akademický článek
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Publikováno v:
Phys. Rev. A 96, 032323 (2017)
We show that it is possible to use a quantum walk to find a path from one marked vertex to another. In the specific case of $M$ stars connected in a chain, one can find the path from the first star to the last one in $O(M\sqrt{N})$ steps, where $N$ i
Externí odkaz:
http://arxiv.org/abs/1707.01581
Publikováno v:
Mathematics 2016, 4, 54
We study the compatibility (or joint measurability) of quantum observables in a setting where the experimenter has access to multiple copies of a given quantum system, rather than performing the experiments on each individual copy separately. We intr
Externí odkaz:
http://arxiv.org/abs/1605.07551
Publikováno v:
Phys. Rev. A 93, 052323 (2016)
The existence of incompatible measurements, epitomized by Heisenberg's uncertainty principle, is one of the distinctive features of quantum theory. So far, quantum incompatibility has been studied for measurements that test the preparation of physica
Externí odkaz:
http://arxiv.org/abs/1511.00976
Publikováno v:
J. Phys. A: Math. Theor. 48 (2015) 435301
A typical bipartite quantum protocol, such as EPR-steering, relies on two quantum features, entanglement of states and incompatibility of measurements. Noise can delete both of these quantum features. In this work we study the behavior of incompatibi
Externí odkaz:
http://arxiv.org/abs/1504.05768
Publikováno v:
Phys. Rev. A 92, 022115 (2015)
The existence of incompatible measurements is a fundamental phenomenon having no explanation in classical physics. Intuitively, one considers given measurements to be incompatible within a framework of a physical theory, if their simultaneous impleme
Externí odkaz:
http://arxiv.org/abs/1501.04554
Autor:
Reitzner, Daniel, Ziman, Mario
Publikováno v:
The European Physical Journal Plus 129, 128 (2014)
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. We introduce a quantum model of an unordered phone book (quantum dat
Externí odkaz:
http://arxiv.org/abs/1406.6391