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EPJ Quantum Technology
Figure 1 | EPJ Quantum Technology

Figure 1

From: Quantum learning of coherent states

Figure 1

A quantum reading scheme that uses a coherent signal \(\pmb{\vert \alpha \rangle}\) , produced by a transmitter, to illuminate a cell of a register that stores a bit of information. A receiver extracts this bit by distinguishing between the two possible states of the reflected signal, \(\vert 0 \rangle\) and \(\vert \alpha \rangle\), assisted by n auxiliary modes sent directly by the transmitter.

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