"Entangled states of large photon numbers"
Dr. Hagai Eisenberg
Department
of Physics, UCSB
Quantum entangled states are useful for fundamental checks of quantum
mechanics and various protocols in quantum information. Polarization
entangled states of photons are very popular due to their high entanglement
quality and simple generation and manipulation. In the last 10 years, the
state of two entangled photons (an EPR pair) has been studied extensively.
When the entanglement involves more particles, new options are opened. Some
examples are more robust quantum cryptography protocols and interferometric
measurements that are more accurate than the Heisenberg limit. Another use
of such states is the violation of large-spin Bell's inequalities. As these
states are getting larger, the cross-over between the quantum micro world
and the classical macro world can be probed.
I will describe a few options for such states of large number of
polarization entangled photons. Recent results that show the generation of
entangled states that contain up to 100 photons will be presented.
Host:
Dr. Ron Lifshitz, x5145
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