TY - JOUR
T1 - Ultrabright source of polarization-entangled photons
AU - Kwiat, Paul G.
AU - Waks, Edo
AU - White, Andrew G.
AU - Appelbaum, Ian
AU - Eberhard, Philippe H.
PY - 1999
Y1 - 1999
N2 - Using the process of spontaneous parametric down-conversion in a two-crystal geometry, we have generated a source of polarization-entangled photon pairs that is more than ten times brighter, per unit of pump power, than previous sources, with another factor of 30 to 75 expected to be readily achievable. We have measured a high level of entanglement between photons emitted over a relatively large collection angle, and over a 10-nm bandwidth. As a demonstration of the source capabilities, we obtained a 242-σ violation of Bell’s inequalities in less than three minutes, and observed near-perfect photon correlations when the collection efficiency was reduced. In addition, both the degree of entanglement and the state purity should be readily tunable.
AB - Using the process of spontaneous parametric down-conversion in a two-crystal geometry, we have generated a source of polarization-entangled photon pairs that is more than ten times brighter, per unit of pump power, than previous sources, with another factor of 30 to 75 expected to be readily achievable. We have measured a high level of entanglement between photons emitted over a relatively large collection angle, and over a 10-nm bandwidth. As a demonstration of the source capabilities, we obtained a 242-σ violation of Bell’s inequalities in less than three minutes, and observed near-perfect photon correlations when the collection efficiency was reduced. In addition, both the degree of entanglement and the state purity should be readily tunable.
UR - http://www.scopus.com/inward/record.url?scp=0000860046&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000860046&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.60.R773
DO - 10.1103/PhysRevA.60.R773
M3 - Article
AN - SCOPUS:0000860046
SN - 1050-2947
VL - 60
SP - R773-R776
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 2
ER -