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Showing 2006 · quant-phShow all
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quant-ph2006★ 15 cited
Determination of ground state properties in quantum spin systems by single qubit unitary operations and entanglement excitation energies
S. M. Giampaolo, F. Illuminati, P. Verrucchi +1
We introduce a method for analyzing ground state properties of quantum many body systems, based on the characterization of separability and entanglement by single subsystem unitary…
quant-ph2006★ 41 cited
A condition for any realistic theory of quantum systems
Alberto Montina
In quantum physics, the density operator completely describes the state. Instead, in classical physics the mean value of every physical quantity is evaluated by means of a probabil…
quant-ph2006★ 36 cited
Tomographic test of Bell's inequality for a time-delocalized single photon
Milena D'Angelo, Alessandro Zavatta, Valentina Parigi +1
Time-domain balanced homodyne detection is performed on two well-separated temporal modes sharing a single photon. The reconstructed density matrix of the two-mode system is used t…