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Showing 2003 · quant-phShow all
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quant-ph2003★ 3 cited
Quantum Lower Bounds for Fanout
Maosen Fang, Stephen Fenner, Frederic Green +2
We prove several new lower bounds for constant depth quantum circuits. The main result is that parity (and hence fanout) requires log depth circuits, when the circuits are composed…
quant-ph2003
Information between quantum systems via POVMs
Lev B. Levitin, Tommaso Toffoli
The concepts of `conditional entropy' and `information' retain their validity for quantum systems, but their properties differ somewhat from those of their classical counterparts;…