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13 papers · 2 filters
Percolated quantum walks with a general shift operator: From trapping to transport
Jan Mareš, Jaroslav Novotný, Igor Jex
We present a generalized definition of discrete-time quantum walks convenient for capturing a rather broad spectrum of walker's behavior on arbitrary graphs. It includes and covers…
Non-markovianity and bound states in quantum walks with a phase impurity
B. Danacı, G. Karpat, İ. Yalçınkaya +1
We study a quantum walker on a one-dimensional lattice with a single defect site characterized by a phase. The spread and localization of discrete-time quantum walks starting at th…
On Clifford groups in quantum computing
J. Tolar
The term Clifford group was introduced in 1998 by D. Gottesmann in his investigation of quantum error-correcting codes. The simplest Clifford group in multiqubit quantum computatio…
Photonic quantum walks with four-dimensional coins
Lennart Lorz, Evan Meyer-Scott, Thomas Nitsche +5
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-dimens…
Phase Transition in Iterated Quantum Protocols for Noisy Inputs
Martin Malachov, Igor Jex, Orsolya Kálmán +1
Quantum information processing exploits all the features quantum mechanics offers. Among them there is the possibility to induce nonlinear maps on a quantum system by involving two…
Quantum state identification of qutrits via a nonlinear protocol
P. V. Pyshkin, A. Gábris, O. Kálmán +2
We propose a probabilistic quantum protocol to realize a nonlinear transformation of qutrit states, which by iterative applications on ensembles can be used to distinguish two type…