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Optimum unambiguous discrimination among linearly-independent non-orthogonal quantum states and its optical realization
Yuqing Sun, Mark Hillery, Janos Bergou
The problem of unambiguously distinguishing among nonorthogonal but linearly independent quantum states can be solved by mapping the set of nonorthogonal quantum states onto a set…
Quantum information distributors: Quantum network for symmetric and asymmetric cloning in arbitrary dimension and continuous limit
Samuel L. Braunstein, Vladimir Buzek, Mark Hillery
We show that for any Hilbert-space dimension, the optimal universal quantum cloner can be constructed from essentially the same quantum circuit, i.e., we find a universal design fo…
Noise-free scattering of the quantized electromagnetic field from a dispersive linear dielectric
Mark Hillery, Peter D. Drummond
We study the scattering of the quantized electromagnetic field from a linear, dispersive dielectric using the scattering formalism for quantum fields. The medium is modeled as a co…
Quantum disentanglers
Vladimir Buzek, Mark Hillery
It is not possible to disentangle a qubit in an unknown state from a set of (N-1) ancilla qubits prepared in a specific reference state . That is, it is not possible to…
Optimal manipulations with qubits: Universal quantum entanglers
Vladimir Buzek, Mark Hillery
We analyze various scenarios for entangling two initially unentangled qubits. In particular, we propose an optimal universal entangler which entangles a qubit in unknown state $|Ψ>…