| Issue |
EPL
Volume 87, Number 6, September 2009
|
|
|---|---|---|
| Article Number | 64003 | |
| Number of page(s) | 5 | |
| Section | Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics | |
| DOI | https://doi.org/10.1209/0295-5075/87/64003 | |
| Published online | 09 October 2009 | |
Characterization of spectral entanglement of spontaneous parametric-down conversion biphotons in femtosecond pulsed regime
1
I.N.RI.M. - Istituto Nazionale di Ricerca Metrologica - Turin, Italy, EU
2
Dipartimento di Fisica, Politecnico di Torino - Turin, Italy, EU
3
A.M. Prokhorov General Physics Institute, Russian Academy of Science - Moscow, Russia
4
Faculty of Physics, M.V. Lomonosov Moscow State University - Moscow, Russia
Corresponding author: m.genovese@inrim.it
Received:
4
June
2009
Accepted:
12
September
2009
We verified the operational approach based on the direct measurement of the entanglement degree for bipartite systems. In particular spectral distributions of single counts and coincidence for pure biphoton states generated by a train of short pump pulses have been measured and the entanglement quantifier has been calculated. The approach gives an upper bound of entanglement stored in total biphoton states, which can reach extremely high values up to 104–105.
PACS: 42.65.Lm – Parametric down conversion and production of entangled photons / 03.65.Ud – Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.) / 03.67.Mn – Entanglement measures, witnesses, and other characterizations
© EPLA, 2009
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.