A. Gábris
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View article: Recurrence in discrete-time quantum stochastic walks
Recurrence in discrete-time quantum stochastic walks Open
Interplay between quantum interference and classical randomness can enhance performance of various quantum information tasks. In the present paper we analyze recurrence phenomena in the discrete-time quantum stochastic walk on a line, whic…
View article: Unambiguous preparation of Bell pairs
Unambiguous preparation of Bell pairs Open
The ability of preparing perfect Bell pairs with a practical scheme is of great relevance for quantum communication as well as distributed quantum computing. We propose a scheme which probabilistically, but unambiguously produces the $\lef…
View article: Mimicking states with limited resources: passing quantum quiz via global control
Mimicking states with limited resources: passing quantum quiz via global control Open
Precise control of quantum systems with a moderate number of degrees of freedom, being of interest for application in quantum technologies, becomes experimentally feasible. Various types of quantum scenarios and protocols are being widely …
View article: Tunable Tradeoff between Quantum and Classical Computation via Nonunitary Zeno-like Dynamics
Tunable Tradeoff between Quantum and Classical Computation via Nonunitary Zeno-like Dynamics Open
We propose and analyze a nonunitary variant of the continuous time Grover\nsearch algorithm based on frequent Zeno-type measurements. We show that the\nalgorithm scales similarly to the pure quantum version by deriving tight\nanalytical lo…
View article: Mimicking states with limited resources: passing quantum quiz via global control
Mimicking states with limited resources: passing quantum quiz via global control Open
Precise control of quantum systems with a moderate number of degrees of freedom, being of interest for application in quantum technologies, becomes experimentally feasible. Various types of quantum scenarios and protocols are being widely …
View article: Tunable Tradeoff between Quantum and Classical Computation via Nonunitary Zeno-like Dynamics
Tunable Tradeoff between Quantum and Classical Computation via Nonunitary Zeno-like Dynamics Open
We propose and analyze a nonunitary variant of the continuous time Grover search algorithm based on frequent Zeno-type measurements. We show that the algorithm scales similarly to the pure quantum version by deriving tight analytical lower…
View article: Local Versus Global Two-Photon Interference in Quantum Networks
Local Versus Global Two-Photon Interference in Quantum Networks Open
We devise an approach to characterizing the intricate interplay between classical and quantum interference of two-photon states in a network, which comprises multiple time-bin modes. By controlling the phases of delocalized single photons,…
View article: A photonic quantum walk with a four-dimensional coin
A photonic quantum walk with a four-dimensional coin Open
The dimensionality of the internal coin space of discrete-time quantum walks has a strong impact on the complexity and richness of the dynamics of quantum walkers. While two-dimensional coin operators are sufficient to define a certain ran…
View article: Probing measurement-induced effects in quantum walks via recurrence
Probing measurement-induced effects in quantum walks via recurrence Open
The effects of projective measurements on the quantum mechanical evolution of a particle can be simulated with coherent light.