The Experts below are selected from a list of 22620 Experts worldwide ranked by ideXlab platform

Alessandro Ferraro - One of the best experts on this subject based on the ideXlab platform.

  • Quantum State engineering using one-dimensional discrete-time Quantum walks
    Physical Review A, 2017
    Co-Authors: Luca Innocenti, Mauro Paternostro, Helena Majury, Taira Giordani, Nicolò Spagnolo, Fabio Sciarrino, Alessandro Ferraro
    Abstract:

    Quantum State preparation in high-dimensional systems is an essential requirement for many Quantum-technology applications. The engineering of an Arbitrary Quantum State is, however, typically strongly dependent on the experimental platform chosen for implementation, and a general framework is still missing. Here we show that coined Quantum walks on a line, which represent a framework general enough to encompass a variety of different platforms, can be used for Quantum State engineering of Arbitrary superpositions of the walker's sites. We achieve this goal by identifying a set of conditions that fully characterize the reachable States in the space comprising walker and coin and providing a method to efficiently compute the corresponding set of coin parameters. We assess the feasibility of our proposal by identifying a linear optics experiment based on photonic orbital angular momentum technology.

  • Quantum State reconstruction of an oscillator network in an optomechanical setting
    Physical Review A, 2016
    Co-Authors: Darren W. Moore, Tommaso Tufarelli, Mauro Paternostro, Alessandro Ferraro
    Abstract:

    We introduce a scheme to reconstruct an Arbitrary Quantum State of a mechanical oscillator network. We assume that a single element of the network is coupled to a cavity field via a linearized optomechanical interaction, whose time dependence is controlled by a classical driving field. By designing a suitable interaction profile, we show how the statistics of an Arbitrary mechanical quadrature can be encoded in the cavity field, which can then be measured. We discuss the important special case of Gaussian State reconstruction, and study numerically the effectiveness of our scheme for a finite number of measurements. Finally, we speculate on possible routes to extend our ideas to the regime of single-photon optomechanics.

Jian Zou - One of the best experts on this subject based on the ideXlab platform.

  • Robust and reliable transfer of a qubit State through an XY spin chain
    Physical Review A, 2009
    Co-Authors: Zhao-ming Wang, C. Allen Bishop, Mark S. Byrd, Bin Shao, Jian Zou
    Abstract:

    We present several protocols for reliable Quantum State transfer through a spin chain. We use a simple two-spin encoding to achieve a remarkably high fidelity transfer for an Arbitrary Quantum State. The fidelity of the transfer also decreases very slowly with increasing chain length. We find that we can also increase the reliability by taking advantage of a local memory and/or confirm transfer using a second spin-chain.

Ahmed Farouk - One of the best experts on this subject based on the ideXlab platform.

  • Secret sharing of a known Arbitrary Quantum State with noisy environment
    Quantum Information Processing, 2015
    Co-Authors: Ming-ming Wang, Wei Wang, Jin-guang Chen, Ahmed Farouk
    Abstract:

    We study Quantum State sharing (QSTS) with noisy environment in this paper. As an example, we present a QSTS scheme of a known State whose information is hold by the dealer and then investigate the noisy influence process of the scheme. Taking the amplitude-damping noise and the phase-damping noise as typical noisy channels, we show that the secret State can be shared among agents with some information lost. Our research connects the areas of Quantum State sharing and remote State preparation.

Yan Xia - One of the best experts on this subject based on the ideXlab platform.

  • Efficient implementation of Arbitrary Quantum State engineering in four-State system by counterdiabatic driving
    Laser Physics Letters, 2018
    Co-Authors: Song-bai Wang, Ye-hong Chen, Bi-hua Huang, Jie Song, Zhi-cheng Shi, Yan Xia
    Abstract:

    A scheme is proposed to implement Quantum State engineering (QSE) in a four-State system via counterdiabatic driving. In the scheme, single- and multi-mode driving methods are used respectively to drive the system to a target State at a predefined time. It is found that a fast QSE can be realized by utilizing simply designed pulses. In addition, a beneficial discussion on the energy consumption between the single- and multi-mode driving protocols shows that the multi-mode driving method seems to have a wider range of applications than the single-mode driving method with respect to different parameters. Finally, the scheme is also helpful for implementing the generalization QSE in high-dimensional systems via the concept of a dressed State. Therefore, the scheme can be implemented with the present experimental technology, which is useful in Quantum information processing.

  • Arbitrary Quantum State engineering in three-State systems via Counterdiabatic driving.
    Scientific reports, 2016
    Co-Authors: Ye-hong Chen, Bi-hua Huang, Jie Song, Yan Xia
    Abstract:

    A scheme for Arbitrary Quantum State engineering (QSE) in three-State systems is proposed. Firstly, starting from a set of complete orthogonal time-dependent basis with undetermined coefficients, a time-dependent Hamiltonian is derived via Counterdiabatic driving for the purpose of guiding the system to attain an Arbitrary target State at a predefined time. Then, on request of the assumed target States, two single-mode driving protocols and a multi-mode driving protocol are proposed as examples to discuss the validity of the QSE scheme. The result of comparison between single-mode driving and multi-mode driving shows that multi-mode driving seems to have a wider rang of application prospect because it can drive the system to an Arbitrary target State from an Arbitrary initial State also at a predefined time even without the use of microwave fields for the transition between the two ground States. Moreover, for the purpose of discussion in the scheme’s feasibility in practice, a polynomial ansatz as the simplest exampleis used to fix the pulses. The result shows that the pulses designed to implement the protocols are not hard to be realized in practice. At the end, QSE in higher-dimensional systems is also discussed in brief as a generalization example of the scheme.

Ming-ming Wang - One of the best experts on this subject based on the ideXlab platform.

  • Secret sharing of a known Arbitrary Quantum State with noisy environment
    Quantum Information Processing, 2015
    Co-Authors: Ming-ming Wang, Wei Wang, Jin-guang Chen, Ahmed Farouk
    Abstract:

    We study Quantum State sharing (QSTS) with noisy environment in this paper. As an example, we present a QSTS scheme of a known State whose information is hold by the dealer and then investigate the noisy influence process of the scheme. Taking the amplitude-damping noise and the phase-damping noise as typical noisy channels, we show that the secret State can be shared among agents with some information lost. Our research connects the areas of Quantum State sharing and remote State preparation.

  • Quantum State sharing of Arbitrary known multi-qubit and multi-qudit States
    International Journal of Quantum Information, 2014
    Co-Authors: Ming-ming Wang, Jin-guang Chen, Xiu-bo Chen, Yi-xian Yang
    Abstract:

    In this paper, we propose a new version of Quantum State sharing (QSTS) scheme of an Arbitrary multi-qubit State. Then we extend the scheme to a general form of sharing an Arbitrary multi-qudit State in the high-dimensional system. The schemes consider the most general case where an Arbitrary Quantum State can be shared among an Arbitrary number of agents in a symmetric way that any agent can recover the State with the help of the others. Compared with a traditional QSTS scheme sharing an unknown State, our schemes are more efficient since the dealer only needs to perform a simpler measurement and consume less classical communication costs.