1.5k citations · 11.7k across the 174 of their papers we have counts for
6 papers · 2 filters
Quantifying entanglement of a two-qubit system via measurable and invariant moments of its partially transposed density matrix
Karol Bartkiewicz, Jiří Beran, Karel Lemr +2
We describe a direct method to determine the negativity of an arbitrary two-qubit state in experiments. The method is derived by analyzing the relation between the purity, negativi…
Quantum state tomography of large nuclear spins in a semiconductor quantum well: Optimal robustness against errors as quantified by condition numbers
Adam Miranowicz, Sahin K. Ozdemir, Jiri Bajer +4
We discuss methods of quantum state tomography for solid-state systems with a large nuclear spin in nanometer-scale semiconductors devices based on a quantum well. Due to q…
Optimal two-qubit tomography based on local and global measurements: Maximal robustness against errors as described by condition numbers
Adam Miranowicz, Karol Bartkiewicz, Jan Perina +3
We present an error analysis of various tomographic protocols based on the linear inversion for the reconstruction of an unknown two-qubit state. We solve the problem of finding a…
State-dependent photon blockade via quantum-reservoir engineering
Adam Miranowicz, Jiri Bajer, Malgorzata Paprzycka +3
An arbitrary initial state of an optical or microwave field in a lossy driven nonlinear cavity can be changed, in the steady-state limit, into a partially incoherent superposition…
Method for universal detection of two-photon polarization entanglement
Karol Bartkiewicz, Paweł Horodecki, Karel Lemr +2
Detecting and quantifying quantum entanglement of a given unknown state poses problems that are fundamentally important for quantum information processing. Surprisingly, no direct…
Optomechanical analog of two-color electromagnetically-induced transparency: Photon transmission through an optomechanical device with a two-level system
Hui Wang, Xiu Gu, Yu-xi Liu +2
Some optomechanical systems can be transparent to a probe field when a strong driving field is applied. These systems can provide an optomechanical analogue of electromagnetically-…