Abstract:
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. © 2017 American Physical Society.
Registro:
Documento: |
Artículo
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Título: | Controlled generation of mixed spatial qudits with arbitrary degree of purity |
Autor: | Varga, J.J.M.; Ledesma, S.; Iemmi, C.; Rebón, L. |
Filiación: | Departamento de Física, Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Buenos Aires, Argentina Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina Departamento de Física, IFLP, Universidad Nacional de la Plata, La Plata, 1900, Argentina
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Palabras clave: | Light modulators; Probability distributions; Quantum optics; Analytical expressions; Arbitrary degree; Arbitrary dimension; Complex coefficients; Independent control; Spatial light modulators; Transmission amplitude; Transverse momenta; Quantum theory |
Año: | 2017
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Volumen: | 96
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Número: | 3
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DOI: |
http://dx.doi.org/10.1103/PhysRevA.96.032309 |
Título revista: | Physical Review A
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Título revista abreviado: | Phys. Rev. A
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ISSN: | 24699926
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_24699926_v96_n3_p_Varga |
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Citas:
---------- APA ----------
Varga, J.J.M., Ledesma, S., Iemmi, C. & Rebón, L.
(2017)
. Controlled generation of mixed spatial qudits with arbitrary degree of purity. Physical Review A, 96(3).
http://dx.doi.org/10.1103/PhysRevA.96.032309---------- CHICAGO ----------
Varga, J.J.M., Ledesma, S., Iemmi, C., Rebón, L.
"Controlled generation of mixed spatial qudits with arbitrary degree of purity"
. Physical Review A 96, no. 3
(2017).
http://dx.doi.org/10.1103/PhysRevA.96.032309---------- MLA ----------
Varga, J.J.M., Ledesma, S., Iemmi, C., Rebón, L.
"Controlled generation of mixed spatial qudits with arbitrary degree of purity"
. Physical Review A, vol. 96, no. 3, 2017.
http://dx.doi.org/10.1103/PhysRevA.96.032309---------- VANCOUVER ----------
Varga, J.J.M., Ledesma, S., Iemmi, C., Rebón, L. Controlled generation of mixed spatial qudits with arbitrary degree of purity. Phys. Rev. A. 2017;96(3).
http://dx.doi.org/10.1103/PhysRevA.96.032309