173 citations
- ARC Centre of Excellence for Engineered Quantum SystemsAU1 paper
- Harvard UniversityUS1 paper
- Instituto de Física de São CarlosBR1 paper
- National Cheng Kung UniversityTW1 paper
- Swinburne University of TechnologyAU1 paper
- The University of MelbourneAU1 paper
- The University of QueenslandAU1 paper
- Universidade de São PauloBR1 paper
- Universidade Estadual Paulista (Unesp)BR1 paper
- Universidade Federal de Ouro PretoBR1 paper
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6 papers · 1 filter
Quantum fidelity measures for mixed states
Yeong-Cherng Liang, Yu-Hao Yeh, Paulo E. M. F. Mendonça +3
Applications of quantum technology often require fidelities to quantify performance. These provide a fundamental yardstick for the comparison of two quantum states. While this is s…
Maximally entangled mixed states for qubit-qutrit systems
Paulo E. M. F. Mendonca, Marcelo A. Marchiolli, Samuel R. Hedemann
We consider the problems of maximizing the entanglement negativity of X-form qubit-qutrit density matrices with (i) a fixed spectrum and (ii) a fixed purity. In the first case, the…
Maximally genuine multipartite entangled mixed X-states of N-qubits
Paulo E. M. F. Mendonca, Seyed Mohammad Hashemi Rafsanjani, Diógenes Galetti +1
For every possible spectrum of -dimensional density operators, we construct an -qubit X-state of same spectrum and maximal genuine multipartite (GM-) concurrence, hence cha…
Heuristic for estimation of multiqubit genuine multipartite entanglement
Paulo E. M. F. Mendonca, Marcelo A. Marchiolli, Gerard J. Milburn
For every N-qubit density matrix written in the computational basis, an associated "X-density matrix" can be obtained by vanishing all entries out of the main- and anti-diagonals.…
Theoretical formulation of finite-dimensional discrete phase spaces: II. On the uncertainty principle for Schwinger unitary operators
Marcelo A. Marchiolli, Paulo E. M. F. Mendonca
We introduce a self-consistent theoretical framework associated with the Schwinger unitary operators whose basic mathematical rules embrace a new uncertainty principle that general…
Universality of Sudden Death of Entanglement
F. F. Fanchini, P. E. M. F. Mendonca, R. d. J. Napolitano
We present a constructive argument to demonstrate the universality of the sudden death of entanglement in the case of two non-interacting qubits, each of which generically coupled…