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9 papers · 2 filters
Frozen Quantum Coherence
Thomas R. Bromley, Marco Cianciaruso, Gerardo Adesso
We analyse under which dynamical conditions the coherence of an open quantum system is totally unaffected by noise. For a single qubit, specific measures of coherence are found to…
Entanglement and quantum correlations in many-body systems: a unified approach via local unitary operations
M. Cianciaruso, S. M. Giampaolo, W. Roga +3
Local unitary operations allow for a unifying approach to the quantification of quantum correlations among the constituents of a bipartite quantum system. For pure states, the dist…
Universal freezing of quantum correlations within the geometric approach
Marco Cianciaruso, Thomas R. Bromley, Wojciech Roga +2
Quantum correlations in a composite system can be measured by resorting to a geometric approach, according to which the distance from the state of the system to a suitable set of c…
Simulating long-distance entanglement in quantum spin chains by superconducting flux qubits
Stefano Zippilli, Miroslav Grajcar, Evgeni Il'ichev +1
We investigate the performance of superconducting flux qubits for the adiabatic quantum simulation of long distance entanglement (LDE), namely a finite ground-state entanglement be…
Device-independent quantum reading and noise-assisted quantum transmitters
Wojciech Roga, Daniela Buono, Fabrizio Illuminati
In quantum reading, a quantum state of light (transmitter) is applied to read classical information. In the presence of noise or for sufficiently weak signals, quantum reading can…
Unifying approach to the quantification of bipartite correlations by Bures distance
Thomas R. Bromley, Marco Cianciaruso, Rosario Lo Franco +1
The notion of distance defined on the set of states of a composite quantum system can be used to quantify total, quantum and classical correlations in a unifying way. We provide ne…