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19912026
most citedAdvances in Quantum Metrology

3.9k citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions
Showing 1998 · quant-phShow all

5 papers · 2 filters

quant-ph1998★ 140 cited

Optimal purification of single qubits

J. I. Cirac, A. K. Ekert, C. Macchiavello

We introduce a new decomposition of the multiqubit states of the form and employ it to construct the optimal single qubit purification procedure. The same decomposi…

quant-ph1998★ 141 cited

Optimal state estimation for d-dimensional quantum systems

D. Bruss, C. Macchiavello

We establish a connection between optimal quantum cloning and optimal state estimation for d-dimensional quantum systems. In this way we derive an upper limit on the fidelity of st…

quant-ph1998★ 668 cited

Distributed Quantum Computation over Noisy Channels

J. I. Cirac, A. Ekert, S. F. Huelga +1

We analyse the use of entangled states to perform quantum computations non locally among distant nodes in a quantum network. The complexity associated with the generation of multip…

quant-ph1998

Quantum Binary Decision for Driven Harmonic Oscillator

Matteo G. A. Paris

We address the problem of determining whether or not a harmonic oscillator has been perturbed by an external force. Quantum detection and estimation theory has been used in devisin…

quant-ph1998★ 2 cited

Noise, errors and information in quantum amplification

G. M. D'Ariano, C. Macchiavello, L. Maccone

We analyze and compare the characterization of a quantum device in terms of noise, transmitted bit-error-rate (BER) and mutual information, showing how the noise description is mea…