Abstract
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.
Original language | English |
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Pages (from-to) | 3834-3839 |
Number of pages | 6 |
Journal | Physics Letters, Section A: General, Atomic and Solid State Physics |
Volume | 375 |
Issue number | 44 |
DOIs | |
Publication status | Published - 2011 Oct 24 |
Externally published | Yes |
Keywords
- Quantum communication
- Quantum information
- Quantum state engineering
ASJC Scopus subject areas
- Physics and Astronomy(all)