TY - JOUR
T1 - Preparation and tomographic reconstruction of an arbitrary single-photon path qubit
AU - Baek, So Young
AU - Kim, Yoon Ho
N1 - Funding Information:
This work was supported by the National Research Foundation of Korea ( 2009-0070668 and 2009-0084473 ) and the Ministry of Knowledge and Economy of Korea through the Ultrafast Quantum Beam Facility Program.
PY - 2011/10/24
Y1 - 2011/10/24
N2 - We report methods for preparation and tomographic reconstruction of an arbitrary single-photon path qubit. The arbitrary single-photon path qubit is prepared losslessly by passing the heralded single-photon state from spontaneous parametric down-conversion through variable beam splitter. Quantum state tomography of the single-photon path qubit is implemented by introducing path-projection measurements based on the first-order single-photon quantum interference. Using the state preparation and path-projection measurements methods for the single-photon path qubit, we demonstrate preparation and complete tomographic reconstruction of the single-photon path qubit with arbitrary purity.
AB - We report methods for preparation and tomographic reconstruction of an arbitrary single-photon path qubit. The arbitrary single-photon path qubit is prepared losslessly by passing the heralded single-photon state from spontaneous parametric down-conversion through variable beam splitter. Quantum state tomography of the single-photon path qubit is implemented by introducing path-projection measurements based on the first-order single-photon quantum interference. Using the state preparation and path-projection measurements methods for the single-photon path qubit, we demonstrate preparation and complete tomographic reconstruction of the single-photon path qubit with arbitrary purity.
KW - Quantum communication
KW - Quantum information
KW - Quantum state engineering
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U2 - 10.1016/j.physleta.2011.08.064
DO - 10.1016/j.physleta.2011.08.064
M3 - Article
AN - SCOPUS:80053576643
VL - 375
SP - 3834
EP - 3839
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
SN - 0375-9601
IS - 44
ER -