193 citations · 739 across the 27 of their papers we have counts for
11 papers · 1 filter
Hyperentanglement of two photons in three degrees of freedom
G. Vallone, R. Ceccarelli, F. De Martini +1
A 6-qubit hyperentangled state has been realized by entangling two photons in three degrees of freedom. These correspond to the polarization, the longitudinal momentum and the indi…
Decoherence of a Macroscopic Quantum Superposition
Francesco De Martini, Fabio Sciarrino, Nicolo' Spagnolo
The high resilience to de-coherence shown by a recently discovered Macroscopic Quantum Superposition (MQS) involving a number of photons in excess of 5 x 10^4 motivates the present…
Hyperentanglement witness
Giuseppe Vallone, Raino Ceccarelli, Francesco De Martini +1
A new criterium to detect the entanglement present in a {\it hyperentangled state}, based on the evaluation of an entanglement witness, is presented. We show how some witnesses rec…
One-way quantum computation with two-photon multiqubit cluster states
Giuseppe Vallone, Enrico Pomarico, Francesco De Martini +1
We describe in detail the application of four qubit cluster states, built on the simultaneous entanglement of two photons in the degrees of freedom of polarization and linear momen…
Schroedinger Cat: Entanglement test in a Micro-Macroscopic system
Francesco De Martini, Fabio Sciarrino, Chiara Vitelli
A Macro-state consisting of N= 3.5 x 10^4 photons in a quantum superposition and entangled with a far apart single-photon state (Micro-state) is generated. Precisely, an entangled…
Generation of time-bin entangled photons without temporal post-selection
Alessandro Rossi, Giuseppe Vallone, Francesco De Martini +1
We report on the implementation of a new interferometric scheme that allows the generation of photon pairs entangled in the time-energy degree of freedom. This scheme does not requ…