Witnessing quantum capacities of correlated channels

Abstract

We test a general method to detect lower bounds of the quantum channel capacity for two-qubit correlated channels. We consider in particular correlated dephasing, depolarising and amplitude damping channels. We show that the method is easily implementable, it does not require a priori knowledge about the channels, and it is very efficient, since it does not rely on full quantum process tomography.

9 pages, 3 figures

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Cited by in corpus (6)

• Mixed-state certification of quantum capacities for noisy communication channels
• Certifying high-dimensional quantum channels
• Pauli transfer matrix direct reconstruction: channel characterization without full process tomography
• Detection of properties and capacities of quantum channels
• Multiqubit noise deconvolution and characterization
• Detecting Quantum Capacities of Continuous-Variable Quantum Channels