The Experts below are selected from a list of 285 Experts worldwide ranked by ideXlab platform

N.k. Simon - One of the best experts on this subject based on the ideXlab platform.

  • A polarimetric extension of the van Cittert-Zernike Theorem for use with microwave Interferometers
    IEEE Geoscience and Remote Sensing Letters, 2004
    Co-Authors: J.r. Piepmeier, N.k. Simon
    Abstract:

    The van Cittert-Zernike theorem describes the Fourier transform relationship between an extended source and its visibility function. Developments in Classical Optics texts use scalar field formulations for the theorem. Here, we develop a polarimetric extension to the van Cittert-Zernike theorem with applications to passive microwave earth remote sensing. The development provides insight into the mechanics of two-dimensional inteferometric imaging, particularly the effects of polarization basis differences between the scene and the observer.

Silvia Ledesma - One of the best experts on this subject based on the ideXlab platform.

  • simulating bell inequality violations with Classical Optics encoded qubits
    Journal of The Optical Society of America B-optical Physics, 2010
    Co-Authors: Matias A Goldin, Diego Francisco, Silvia Ledesma
    Abstract:

    We present here a Classical Optics device based on an imaging architecture as an analogy of a quantum system where the violation of the Bell inequality can be evidenced. Quantum states are encoded using an electromagnetic wave modulated in amplitude and phase. Unitary operations involved in the measurement of the observables are simulated with the use of a coherent optical processor. The images obtained in the output of the process contain all the information about the possible outcomes of the joint measurement. By measuring the intensity distribution in the image plane we evaluate the mean values of the simulated observables. The obtained experimental results show how some correlations of Clauser-Horne-Shimony-Holt-type exceed the upper bound imposed by the local realism hypothesis as a consequence of the joint effect of entanglement and two-particle interference.

  • Simulating Bell inequalities violation with Classical Optics encoded qbits
    arXiv: Quantum Physics, 2009
    Co-Authors: Matias A Goldin, Diego Francisco, Silvia Ledesma
    Abstract:

    We present here a Classical Optics device based on an imaging architecture as analogy of a quantum system where the violation of the Bell inequality can be evidenced. In our case, the two qbits entangled state needed to obtain non Classical correlations is encoded using an electromagnetic wave modulated in amplitude and phase. Computational states are represented in a way where each one of the two qbits is associated with two orthogonal directions in the input plane. In addition, unitary operations involved in the measurement of the observables are simulated with the use of a coherent optical processor. The images obtained in the output of the process, contain all the information about the joint, marginal and conditional probabilities. By measuring the intensity distribution in the image plane we evaluate the mean values of the simulated observables. The obtained experimental results show, in an illustrative manner, how some correlations of Clauser-Horne-Shimony-Holt type exceed the upper bound imposed by the local realism hypothesis as a consequence of the joint effect of entanglement and two-particle interference.

  • Classical Optics analogy of quantum teleportation
    Journal of The Optical Society of America B-optical Physics, 2008
    Co-Authors: Diego Francisco, Silvia Ledesma
    Abstract:

    A Classical Optics setup to simulate the quantum teleportation process is presented. The analogy is based on the possibility of encoding a quantum state of a system with a 2N-dimensional Hilbert space as an image in the input of an optical system. The probability amplitude of each state of a basis is associated with the complex amplitude of the electromagnetic field in a given region of the laser wavefront. Temporal evolutions are represented as changes of the complex amplitude of the field when the wavefront is modified by different optical elements. The Classical Optics representation of quantum state as images and of universal quantum gates as optical processors is shown. The design and operation of an optical module that is used to simulate the quantum teleportation process are discussed. Experimental results where the teleportation of a one qbit state is simulated are shown.

  • simulating a quantum walk with Classical Optics
    Physical Review A, 2006
    Co-Authors: Diego Francisco, Claudio Iemmi, Silvia Ledesma
    Abstract:

    We present an optical module to simulate one step of a quantum walk algorithm. The quantum state of a system with a 2N-dimensional Hilbert space is encoded in the spatial distribution of the amplitude of the electromagnetic field in a plane. In such spatial encoding, the probability amplitude of each state of a basis is associated with the complex electromagnetic amplitude in a given slice of the laser wave front. We discuss the design and operation of an optical module that is used to implement one step of a quantum walk algorithm. Using this module, composed by standard optical elements, the evolution of the quantum state corresponds to the application of a Hadamard gate on a single qubit (representing the two-dimensional quantum coin) followed by a displacement of the N-dimensional quantum walker conditioned on the state of the coin. We show the actual implementation of the method and discuss its characteristics and limitations.

J.r. Piepmeier - One of the best experts on this subject based on the ideXlab platform.

  • A polarimetric extension of the van Cittert-Zernike Theorem for use with microwave Interferometers
    IEEE Geoscience and Remote Sensing Letters, 2004
    Co-Authors: J.r. Piepmeier, N.k. Simon
    Abstract:

    The van Cittert-Zernike theorem describes the Fourier transform relationship between an extended source and its visibility function. Developments in Classical Optics texts use scalar field formulations for the theorem. Here, we develop a polarimetric extension to the van Cittert-Zernike theorem with applications to passive microwave earth remote sensing. The development provides insight into the mechanics of two-dimensional inteferometric imaging, particularly the effects of polarization basis differences between the scene and the observer.

Diego Francisco - One of the best experts on this subject based on the ideXlab platform.

  • simulating bell inequality violations with Classical Optics encoded qubits
    Journal of The Optical Society of America B-optical Physics, 2010
    Co-Authors: Matias A Goldin, Diego Francisco, Silvia Ledesma
    Abstract:

    We present here a Classical Optics device based on an imaging architecture as an analogy of a quantum system where the violation of the Bell inequality can be evidenced. Quantum states are encoded using an electromagnetic wave modulated in amplitude and phase. Unitary operations involved in the measurement of the observables are simulated with the use of a coherent optical processor. The images obtained in the output of the process contain all the information about the possible outcomes of the joint measurement. By measuring the intensity distribution in the image plane we evaluate the mean values of the simulated observables. The obtained experimental results show how some correlations of Clauser-Horne-Shimony-Holt-type exceed the upper bound imposed by the local realism hypothesis as a consequence of the joint effect of entanglement and two-particle interference.

  • Simulating Bell inequalities violation with Classical Optics encoded qbits
    arXiv: Quantum Physics, 2009
    Co-Authors: Matias A Goldin, Diego Francisco, Silvia Ledesma
    Abstract:

    We present here a Classical Optics device based on an imaging architecture as analogy of a quantum system where the violation of the Bell inequality can be evidenced. In our case, the two qbits entangled state needed to obtain non Classical correlations is encoded using an electromagnetic wave modulated in amplitude and phase. Computational states are represented in a way where each one of the two qbits is associated with two orthogonal directions in the input plane. In addition, unitary operations involved in the measurement of the observables are simulated with the use of a coherent optical processor. The images obtained in the output of the process, contain all the information about the joint, marginal and conditional probabilities. By measuring the intensity distribution in the image plane we evaluate the mean values of the simulated observables. The obtained experimental results show, in an illustrative manner, how some correlations of Clauser-Horne-Shimony-Holt type exceed the upper bound imposed by the local realism hypothesis as a consequence of the joint effect of entanglement and two-particle interference.

  • Classical Optics analogy of quantum teleportation
    Journal of The Optical Society of America B-optical Physics, 2008
    Co-Authors: Diego Francisco, Silvia Ledesma
    Abstract:

    A Classical Optics setup to simulate the quantum teleportation process is presented. The analogy is based on the possibility of encoding a quantum state of a system with a 2N-dimensional Hilbert space as an image in the input of an optical system. The probability amplitude of each state of a basis is associated with the complex amplitude of the electromagnetic field in a given region of the laser wavefront. Temporal evolutions are represented as changes of the complex amplitude of the field when the wavefront is modified by different optical elements. The Classical Optics representation of quantum state as images and of universal quantum gates as optical processors is shown. The design and operation of an optical module that is used to simulate the quantum teleportation process are discussed. Experimental results where the teleportation of a one qbit state is simulated are shown.

  • simulating a quantum walk with Classical Optics
    Physical Review A, 2006
    Co-Authors: Diego Francisco, Claudio Iemmi, Silvia Ledesma
    Abstract:

    We present an optical module to simulate one step of a quantum walk algorithm. The quantum state of a system with a 2N-dimensional Hilbert space is encoded in the spatial distribution of the amplitude of the electromagnetic field in a plane. In such spatial encoding, the probability amplitude of each state of a basis is associated with the complex electromagnetic amplitude in a given slice of the laser wave front. We discuss the design and operation of an optical module that is used to implement one step of a quantum walk algorithm. Using this module, composed by standard optical elements, the evolution of the quantum state corresponds to the application of a Hadamard gate on a single qubit (representing the two-dimensional quantum coin) followed by a displacement of the N-dimensional quantum walker conditioned on the state of the coin. We show the actual implementation of the method and discuss its characteristics and limitations.

Thomas Konrad - One of the best experts on this subject based on the ideXlab platform.

  • implementation of multidimensional quantum walks using linear Optics and Classical light
    Physical Review A, 2015
    Co-Authors: Sandeep K Goyal, Filippus S Roux, Andrew Forbes, Thomas Konrad
    Abstract:

    Classical Optics can be used to efficiently implement certain quantum information processing tasks with a high degree of control, for example, one-dimensional quantum walks through the space of orbital angular momentum of light directed by its polarization. To explore the potential of quantum information processing with Classical light, we here suggest a method to realize d-dimensional quantum walks with Classical Optics---an important step towards robust implementation of certain quantum algorithms. In this scheme, different degrees of freedom of light, such as frequency, orbital angular momentum, and time bins, represent different directions for the walker while the coin to decide which direction the walker takes is realized by employing the polarization combined with different light paths.