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arXiv · 1702.07846

Two-channel spin-chain communication line and simple quantum gates

J. Stolze·A. I. Zenchuk
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Abstract

We consider the remote creation of a mixed state in a one-qubit receiver connected to two two-qubit senders via different channels. {Channels are assumed to be chains of spins (qubits) with nearest-neighbor interactions, no external fields are being applied.} The problem of sharing the creatable region of the receiver's state-space between two senders is considered for a communication line with the receiver located asymmetrically with respect to these senders (asymmetric communication line). An example of a quantum register realizing simple functions is constructed on the basis of a symmetric communication line. In that setup, the initial states of the two senders serve as input and control signals, respectively, while the state of the receiver at a proper time instant is considered as the output signal.

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J. Stolze, A. I. Zenchuk. 2017-06-07. Two-channel spin-chain communication line and simple quantum gates. https://doi.org/10.1016/j.physleta.2017.05.064

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