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Single-photon Mach–Zehnder interferometer for quantum networks based on the single-photon Faraday effect
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10.1063/1.2948924
/content/aip/journal/jap/104/1/10.1063/1.2948924
http://aip.metastore.ingenta.com/content/aip/journal/jap/104/1/10.1063/1.2948924
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Two-level system of a QD, depicting the SPFE. The rotation of the single-photon linear polarization is clockwise in the plane perpendicular to its propagation when the excess electron spin is up .

Image of FIG. 2.
FIG. 2.

Schematic for a spin-based SMZI where the spins of the electrons in the upper and lower arms are either parallel (above) or antiparallel (below), giving, respectively, an identical and an opposite rotation of the polarization.

Image of FIG. 3.
FIG. 3.

The SMZI could be used as a switch. The top switch is on and thus allows for the teleportation of Alice’s qubit to Bob’s qubit in channel A by means of the single photon produced at clock time . However, the other switches are shown to be off and therefore the single photons produced from the sources aligned with these switches at the same time are unable to pass through channels B and C and carry on the transfer of quantum information.

Image of FIG. 4.
FIG. 4.

Switches based on the SMZI could also be implemented in a wavelength division multiplexing scheme for long distance quantum communication applications. Each single-photon source is tuned to a different wavelength; then they are entangled with their respective Bob’s qubit before the multiplexing step. At the destination node, the single photons are demultiplexed before they are allowed to interact with their respective Alice’s qubit to complete the teleportation process.

Image of FIG. 5.
FIG. 5.

Configuration of the SMZI as a gate.

Image of FIG. 6.
FIG. 6.

Diagram of gate operations on a single-photon polarization when the initial polarization is in the first quadrant.

Image of FIG. 7.
FIG. 7.

Configuration of the SMZI as a gate.

Image of FIG. 8.
FIG. 8.

Configuration of the SMZI as a gate.

Image of FIG. 9.
FIG. 9.

Configuration of the SMZI as a gate.

Image of FIG. 10.
FIG. 10.

Configuration of the SMZI as a phase gate.

Image of FIG. 11.
FIG. 11.

Phases accumulated during interaction as a function of time.

Image of FIG. 12.
FIG. 12.

Time evolution of the probability amplitudes of left and right circular polarization components.

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/content/aip/journal/jap/104/1/10.1063/1.2948924
2008-07-09
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Single-photon Mach–Zehnder interferometer for quantum networks based on the single-photon Faraday effect
http://aip.metastore.ingenta.com/content/aip/journal/jap/104/1/10.1063/1.2948924
10.1063/1.2948924
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