869 citations · 10.9k across the 170 of their papers we have counts for
Showing 1997 · quant-phShow all
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quant-ph1997★ 283 cited
Optimal universal quantum cloning and state estimation
D. Bruss, A. Ekert, C. Macchiavello
We derive a tight upper bound for the fidelity of a universal N to M qubit cloner, valid for any M \geq N, where the output of the cloner is required to be supported on the symmetr…
quant-ph1997★ 557 cited
Optimal Universal and State-Dependent Quantum Cloning
D. Bruss, D. P. DiVincenzo, A. Ekert +3
We establish the best possible approximation to a perfect quantum cloning machine which produces two clones out of a single input. We analyze both universal and state-dependent clo…
quant-ph1997★ 181 cited
Quantum copying: A network
V. Buzek, S. L. Braunstein, M. Hillery +1
We present a network consisting of quantum gates which produces two imperfect copies of an arbitrary qubit. The quality of the copies does not depend on the input qubit. We also sh…