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11 papers · 2 filters
Nuclear Spins in a Nanoscale Device for Quantum Information Processing
S. K. Ozdemir, A. Miranowicz, T. Ota +3
Coherent oscillations between any two levels from four nuclear spin states of I=3/2 have been demonstrated in a nanometre-scale NMR semiconductor device, where nuclear spins are al…
Multiuser quantum communication networks
A. Wojcik, T. Luczak, P. Kurzynski +3
We study a quantum state transfer between spins interacting with an arbitrary network of spins coupled by uniform XX interactions. It is shown that in such a system under fairly ge…
Relativistic effects in quantum walks: Klein's paradox and Zitterbewegung
Pawel Kurzynski
Quantum walks are not only algorithmic tools for quantum computation but also not trivial models which describe various physical processes. The paper compares one-dimensional versi…
Nanometre-scale nuclear-spin device for quantum information processing
Y. Hirayama, A. Miranowicz, T. Ota +4
We have developed semiconductor point contact devices in which nuclear spins in a nanoscale region are coherently controlled by all-electrical methods. Different from the standard…
Selective truncations of an optical state using projection synthesis
Adam Miranowicz, Sahin Kaya Ozdemir, Jiri Bajer +2
Selective truncation of Fock-state expansion of an optical field can be achieved using projection synthesis. The process removes predetermined Fock states from the input field by c…
Inseparability criteria based on matrices of moments
A. Miranowicz, M. Piani, P. Horodecki +1
Inseparability criteria for continuous and discrete bipartite quantum states based on moments of annihilation and creation operators are studied by developing the idea of Shchukin-…