TY - JOUR
T1 - Superposition-preserving photon-number amplifier
AU - Björk, Gunnar
AU - Söderholm, Jonas
AU - Karlsson, Anders
PY - 1998
Y1 - 1998
N2 - We analyze a pure-state photon-number amplifier (PNA), i.e., a device that performs the action [Formula Presented] where [Formula Presented] is a positive integer. We derive expressions for the fidelity of a finite internal state PNA and demonstrate that the amplifier fidelity, i.e., the similarity between the obtained and the desired output state can be made to approach unity. Finally we outline a systematic procedure to find the Hamiltonian for any finite Hilbert-space PNA and compute the Hamiltonian for a simple but nontrivial PNA.
AB - We analyze a pure-state photon-number amplifier (PNA), i.e., a device that performs the action [Formula Presented] where [Formula Presented] is a positive integer. We derive expressions for the fidelity of a finite internal state PNA and demonstrate that the amplifier fidelity, i.e., the similarity between the obtained and the desired output state can be made to approach unity. Finally we outline a systematic procedure to find the Hamiltonian for any finite Hilbert-space PNA and compute the Hamiltonian for a simple but nontrivial PNA.
UR - http://www.scopus.com/inward/record.url?scp=0343615556&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.57.650
DO - 10.1103/PhysRevA.57.650
M3 - Artículo
AN - SCOPUS:0343615556
SN - 1050-2947
VL - 57
SP - 650
EP - 658
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 1
ER -