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Projecte llegit

Títol: Quantum teleportation of spatial images: fundamentals and technological limitations

Estudiants que han llegit aquest projecte:

Director/a: TORRES GIL, SANTIAGO

Departament: FIS

Títol: Quantum teleportation of spatial images: fundamentals and technological limitations

Data inici oferta: 15-02-2022     Data finalització oferta: 20-02-2022


Estudis d'assignació del projecte:
    GR ENG SIS TELECOMUN
    GR ENG SIST AEROESP
    GR ENG TELEMÀTICA
Tipus: Individual
 
Lloc de realització:
UPC
    Departament: Teoria Senyal i Comunicacions
 
Nom del segon director/a (UPC): Juan Pérez Torres
Departament 2n director/a:
 
Paraules clau:
quantum optical technologies, quantum teleportation
 
Descripció del contingut i pla d'activitats:
Quantum teleportation is a crucial resource in future quantum
networks. It allows the transfer of quantum information unknown
to two parties that share a quantum channel and a classical
channel. It was proposed in 1993 [C. H. Bennet et al., PRL 70,
1895 (1992)] and first demonstrated experimentally in 1997 [D.
Boschi et al., PRL 80, 1121 (1998); D. Bouwmeester et al., Nature
390, 575 (1997)]. From that time on many experiments have proved
the quantum teleportation protocol under different circumstances:
with information embedded in photons or/and atoms, in longer and
longer distances'For teleporting the large amount of information
embedded in spatial images one requires the use of
multidimensional quantum teleportation. In general, these schemes
are cumbersome to implement experimentally [Xi-LinWang et al.,
Nature Photonics 518, 516 (2015); Yi-Han Luo et al., PRL 123,
070505 (2019)], because it is difficult to implement Bell state
analysers that can faithfully detect many Bell states. However,
S. Molotkov proposed in 1998 a scheme to teleport single-photon
wave-packets, and therefore spatial images, that overcomes most
of the limitations of the standard procedures [S. N. Molotkov,
JEPT Letters 68, 263 (1998); Physics Letters A 245, 339 (1998)].
Recently this scheme has been demonstrated experimentally [B.
Sephton et al., High-dimensional spatial teleportation enabled by
nonlinear optics, arXiv:2111.13624v1 [quant-ph] (2021)]. In this
project we will analyse with detail the experimental
implementation of the scheme to teleport images with current
technology. We will consider the limitations of this scheme, what
type of images can be teleported and how these limitations could
be overcome.
 
Overview (resum en anglès):
Quantum teleportation is a crucial resource in future quantum networks. It allows the
transfer of quantum information unknown to two parties that share a quantum channel and
a classical channel. It was proposed in 1993 [C. H. Bennet et al., PRL 70, 1895 (1992)]
and first demonstrated experimentally in 1997 [D. Boschi et al., PRL 80, 1121 (1998); D.
Bouwmeester et al., Nature 390, 575 (1997)]. From that time on many experiments have
proved the quantum teleportation protocol under different circumstances: with information
embedded in photons or/and atoms, in longer and longer distances.
For teleporting the large amount of information embedded in spatial images one requires
the use of multidimensional quantum teleportation. In general, these schemes are cumber-
some to implement experimentally [Xi-LinWang et al., Nature Photonics 518, 516 (2015);
Yi-Han Luo et al., PRL 123, 070505 (2019)], because it is difficult to implement Bell state
analysers that can faithfully detect many Bell states. However, S. Molotkov proposed in
1998 a scheme to teleport single-photon wave-packets, and therefore spatial images, that
overcomes most of the limitations of the standard procedures [S. N. Molotkov, JEPT Let-
ters 68, 263 (1998); Physics Letters A 245, 339 (1998)].
Recently this scheme has been demonstrated experimentally [B. Sephton et al., High-
dimensional spatial teleportation enabled by nonlinear optics, arXiv:2111.13624v1 [quant-
ph] (2021)]. In this project we will analyse with detail the experimental implementation of
the scheme to teleport images with current technology and its limitations.

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