Superbroadcasting of mixed states.
نویسندگان
چکیده
We derive the optimal universal broadcasting for mixed states of qubits. We show that the no-broadcasting theorem cannot be generalized to more than a single input copy. Moreover, for four or more input copies it is even possible to purify the input states while broadcasting. We name such purifying broadcasting superbroadcasting.
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عنوان ژورنال:
- Physical review letters
دوره 95 6 شماره
صفحات -
تاریخ انتشار 2005