Controlled generation of mixed spatial qudits with arbitrary degree of purity

We propose a method for preparing mixed quantum states of arbitrary dimension D (D≥2) which are codified in the discretized transverse momentum and position of single photons, once they are sent through an aperture with D slits. Following our previous technique we use a programmable single phase-onl...

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Autores principales: Varga, Juan José Miguel, Ledesma, Silvia Adriana, Iemmi, Claudio César, Rebón, Lorena
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Física
Ciencias Exactas
Quantum information
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/96570
https://ri.conicet.gov.ar/11336/66712
https://journals.aps.org/pra/abstract/10.1103/PhysRevA.96.032309
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-96570
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Ciencias Exactas
Quantum information
spellingShingle Física
Ciencias Exactas
Quantum information
Varga, Juan José Miguel
Ledesma, Silvia Adriana
Iemmi, Claudio César
Rebón, Lorena
Controlled generation of mixed spatial qudits with arbitrary degree of purity
topic_facet Física
Ciencias Exactas
Quantum information
description We propose a method for preparing mixed quantum states of arbitrary dimension D (D≥2) which are codified in the discretized transverse momentum and position of single photons, once they are sent through an aperture with D slits. Following our previous technique we use a programmable single phase-only spatial light modulator (SLM) to define the aperture and set the complex transmission amplitude of each slit, allowing the independent control of the complex coefficients that define the quantum state. Since these SLMs give us the possibility to dynamically vary the complex coefficients of the state during the measurement time, we can generate not only pure states but also quantum states compatible with a mixture of pure quantum states. Therefore, by using these apertures varying on time according to a probability distribution, we have experimentally obtained D-dimensional quantum states with purities that depend on the parameters of the distribution through a clear analytical expression. This fact allows us to easily customize the states to be generated. Moreover, the method offers the possibility of working without changing the optical setup between pure and mixed states, or when the dimensionality of the states is increased. The obtained results show a quite good performance of our method at least up to dimension D=11, being the fidelity of the prepared states F>0.98 in every case.
format Articulo
Articulo
author Varga, Juan José Miguel
Ledesma, Silvia Adriana
Iemmi, Claudio César
Rebón, Lorena
author_facet Varga, Juan José Miguel
Ledesma, Silvia Adriana
Iemmi, Claudio César
Rebón, Lorena
author_sort Varga, Juan José Miguel
title Controlled generation of mixed spatial qudits with arbitrary degree of purity
title_short Controlled generation of mixed spatial qudits with arbitrary degree of purity
title_full Controlled generation of mixed spatial qudits with arbitrary degree of purity
title_fullStr Controlled generation of mixed spatial qudits with arbitrary degree of purity
title_full_unstemmed Controlled generation of mixed spatial qudits with arbitrary degree of purity
title_sort controlled generation of mixed spatial qudits with arbitrary degree of purity
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/96570
https://ri.conicet.gov.ar/11336/66712
https://journals.aps.org/pra/abstract/10.1103/PhysRevA.96.032309
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AT ledesmasilviaadriana controlledgenerationofmixedspatialquditswitharbitrarydegreeofpurity
AT iemmiclaudiocesar controlledgenerationofmixedspatialquditswitharbitrarydegreeofpurity
AT rebonlorena controlledgenerationofmixedspatialquditswitharbitrarydegreeofpurity
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