The Experts below are selected from a list of 11856 Experts worldwide ranked by ideXlab platform

Sae Woo Nam - One of the best experts on this subject based on the ideXlab platform.

  • Quantum Teleportation across a metropolitan fibre network
    Nature Photonics, 2016
    Co-Authors: Raju Valivarthi, Varun B Verma, Sae Woo Nam, Marcel Li Grimau Puigibert, Qiang Zhou, G H Aguilar, Francesco Marsili, Matthew D Shaw, Daniel Oblak, Wolfgang Tittel
    Abstract:

    The first field test of Quantum Teleportation is implemented across a metropolitan fibre network with independent Quantum light sources. To establish a robust Quantum Teleportation system in the real world, several feedback mechanisms are developed.

  • Quantum Teleportation over 100 km of fiber using highly efficient superconducting nanowire single photon detectors
    Optica, 2015
    Co-Authors: Hiroki Takesue, Shellee D Dyer, Martin J Stevens, Varun B Verma, Richard P Mirin, Sae Woo Nam
    Abstract:

    Quantum Teleportation is an essential Quantum operation by which we can transfer an unknown Quantum state to a remote location with the help of Quantum entanglement and classical communication. Since the first experimental demonstrations using photonic qubits and continuous variables, the distance of photonic Quantum Teleportation over free-space channels has continued to increase and has reached >100  km. On the other hand, Quantum Teleportation over optical fiber has been challenging, mainly because the multifold photon detection that inevitably accompanies Quantum Teleportation experiments has been very inefficient due to the relatively low detection efficiencies of typical telecom-band single-photon detectors. Here, we report on Quantum Teleportation over optical fiber using four high-detection-efficiency superconducting nanowire single-photon detectors (SNSPDs). These SNSPDs make it possible to perform highly efficient multifold photon measurements, allowing us to confirm that the Quantum states of input photons were successfully teleported over 100 km of fiber with an average fidelity of 83.7±2.0%.

  • Quantum Teleportation over 100 km of fiber using highly efficient superconducting nanowire single photon detectors
    arXiv: Quantum Physics, 2015
    Co-Authors: Hiroki Takesue, Shellee D Dyer, Martin J Stevens, Varun B Verma, Richard P Mirin, Sae Woo Nam
    Abstract:

    Quantum Teleportation is an essential Quantum operation by which we can transfer an unknown Quantum state to a remote location with the help of Quantum entanglement and classical communication. Since the first experimental demonstrations using photonic qubits and continuous variables, the distance of photonic Quantum Teleportation over free space channels has continued to increase and has reached >100 km. On the other hand, Quantum Teleportation over optical fiber has been challenging, mainly because the multi-fold photon detection that inevitably accompanies Quantum Teleportation experiments has been very inefficient due to the relatively low detection efficiencies of typical telecom-band single photon detectors. Here, we report efficient Quantum Teleportation over optical fiber using four high-detection efficiency superconducting nanowire superconducting single-photon detectors (SNSPD) based on MoSi. These SNSPDs make it possible to perform highly-efficient multi-fold photon measurements, allowing us to confirm that the Quantum states of input photons were successfully teleported over 100 km of fiber.

  • Quantum Teleportation from a telecom wavelength photon to a solid state Quantum memory
    Nature Photonics, 2014
    Co-Authors: F. Bussières, C. Clausen, A. Tiranov, B. Korzh, A. Ferrier, Varun B Verma, Sae Woo Nam, Francesco Marsili
    Abstract:

    Quantum Teleportation of the state of a qubit encoded in the polarization state is demonstrated from a telecom-wavelength photon to a solid-state Quantum memory via 24.8 km of optical fibre. It is the longest distance ever reached in a Teleportation experiment involving a Quantum memory.

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

  • Quantum-Teleportation-Inspired Algorithm for Sampling Large Random Quantum Circuits.
    Physical review letters, 2020
    Co-Authors: Mingcheng Chen, Lin Gan, Xiaobo Zhu, Guangwen Yang, Jian-wei Pan
    Abstract:

    Quantum Teleportation transfers and processes Quantum information through Quantum entanglement channels. It is one of the most versatile protocols in Quantum information science and leads to many remarkable applications, particularly the one-way Quantum computing. Here, we show, for the first time, that the concept of Teleportation can also be used to facilitate an important classical computing task, sampling random Quantum circuits, which is highly relevant to prove the near-term demonstration of Quantum computational supremacy. In our method, the classical computation in the physical-qubit state space is converted to simulate Teleportation in logical-qubit state space, resulting in a much smaller number of qubits involved in classical computing. We tested this new method on 1D and 2D lattices up to 1000 qubits. This Letter presents a new Quantum-inspired classical computing technology and is helpful to design and optimize classically hard Quantum sampling experiments.

  • Quantum Teleportation between remote atomic ensemble Quantum memories
    Proceedings of the National Academy of Sciences of the United States of America, 2012
    Co-Authors: Xiaohui Bao, Jian-wei Pan, Zhensheng Yuan
    Abstract:

    Quantum Teleportation and Quantum memory are two crucial elements for large-scale Quantum networks. With the help of prior distributed entanglement as a "Quantum channel," Quantum Teleportation provides an intriguing means to faithfully transfer Quantum states among distant locations without actual transmission of the physical carriers [Bennett CH, et al. (1993) Phys Rev Lett 70(13):1895-1899]. Quantum memory enables controlled storage and retrieval of fast-flying photonic Quantum bits with stationary matter systems, which is essential to achieve the scalability required for large-scale Quantum networks. Combining these two capabilities, here we realize Quantum Teleportation between two remote atomic-ensemble Quantum memory nodes, each composed of ∼10(8) rubidium atoms and connected by a 150-m optical fiber. The spin wave state of one atomic ensemble is mapped to a propagating photon and subjected to Bell state measurements with another single photon that is entangled with the spin wave state of the other ensemble. Two-photon detection events herald the success of Teleportation with an average fidelity of 88(7)%. Besides its fundamental interest as a Teleportation between two remote macroscopic objects, our technique may be useful for Quantum information transfer between different nodes in Quantum networks and distributed Quantum computing.

  • experimental nonlocality proof of Quantum Teleportation and entanglement swapping
    Physical Review Letters, 2001
    Co-Authors: Thomas Jennewein, Jian-wei Pan, Gregor Weihs, Anton Zeilinger
    Abstract:

    Quantum Teleportation strikingly underlines the peculiar features of the Quantum world. We present an experimental proof of its Quantum nature, teleporting an entangled photon with such high quality that the nonlocal Quantum correlations with its original partner photon are preserved. This procedure is also known as entanglement swapping. The nonlocality is confirmed by observing a violation of Bell's inequality by 4.5 standard deviations. Thus, by demonstrating Quantum nonlocality for photons that never interacted, our results directly confirm the Quantum nature of Teleportation.

  • experimental Quantum Teleportation
    Philosophical transactions - Royal Society. Mathematical physical and engineering sciences, 1998
    Co-Authors: Dirk Bouwmeester, Klaus Mattle, Jian-wei Pan, Harald Weinfurter, Manfred Eibl, Anton Zeilinger
    Abstract:

    Quantum entanglement lies at the heart of new proposals for Quantum communication and computation. Here we describe the recent experimental realization of Quantum Teleportation.

  • Experimental Quantum Teleportation
    Philosophical Transactions of the Royal Society A: Mathematical Physical and Engineering Sciences, 1998
    Co-Authors: Dik Bouwmeester, Klaus Mattle, Jian-wei Pan, Harald Weinfurter, Manfred Eibl, Anton Zeilinger
    Abstract:

    Quantum Teleportation -- the transmission and reconstruction over arbitrary distances of the state of a Quantum system -- is demonstrated experimentally. During Teleportation, an initial photon which carries the polarization that is to be transferred and one of a pair of entangled photons are subjected to a measurement such that the second photon of the entangled pair acquires the polarization of the initial photon. This latter photon can be arbitrarily far away from the initial one. Quantum Teleportation will be a critical ingredient for Quantum computation networks.

Anton Zeilinger - One of the best experts on this subject based on the ideXlab platform.

  • experimental Quantum Teleportation over a high loss free space channel
    arXiv: Quantum Physics, 2012
    Co-Authors: Sebastian Kropatschek, Anton Zeilinger, Thomas Herbst, Thomas Scheidl, William Naylor, Johannes Kofler, Rupert Ursin
    Abstract:

    We present a high-fidelity Quantum Teleportation experiment over a high-loss free-space channel between two laboratories. We teleported six states of three mutually unbiased bases and obtained an average state fidelity of 0.82(1), well beyond the classical limit of 2/3. With the obtained data, we tomographically reconstructed the process matrices of Quantum Teleportation. The free-space channel attenuation of 31 dB corresponds to the estimated attenuation regime for a down-link from a low-earth-orbit satellite to a ground station. We also discussed various important technical issues for future experiments, including the dark counts of single-photon detectors, coincidence-window width etc. Our experiment tested the limit of performing Quantum Teleportation with state-of-the-art resources. It is an important step towards future satellite-based Quantum Teleportation and paves the way for establishing a worldwide Quantum communication network.

  • Quantum Teleportation and entanglement swapping with linear optics logic gates
    New Journal of Physics, 2009
    Co-Authors: Christian Schmid, Anton Zeilinger, Rupert Ursin, Nikolai Kiesel, Ulrich K Weber, Harald Weinfurter
    Abstract:

    We report on the usage of a linear optics phase gate for distinguishing all four Bell states simultaneously in a Quantum Teleportation and entanglement swapping protocol. This is demonstrated by full-state tomography of the one- and two-qubit output states of the two protocols, yielding average state fidelities of about 0.83 and 0.77, respectively. In addition, the performance of the Teleportation channel is characterized by the Quantum process tomography. The non-classical properties of the entanglement swapping output states are further confirmed by the violation of a CHSH-type Bell inequality of 2.14 on average.

  • Quantum Teleportation and entanglement swapping with linear optics logic gates
    arXiv: Quantum Physics, 2008
    Co-Authors: Christian Schmid, Anton Zeilinger, Rupert Ursin, Nikolai Kiesel, Ulrich K Weber, Harald Weinfurter
    Abstract:

    We report on the usage of a linear optics phase gate for distinguishing all four Bell states simultaneously in a Quantum Teleportation and entanglement swapping protocol. This is demonstrated by full state tomography of the one and two qubit output states of the two protocols, yielding average state fidelities of about 0.83 and 0.77, respectively. In addition, the performance of the Teleportation channel is characterised by Quantum process tomography. The non classical properties of the entanglement swapping output states are further confirmed by the violation of a CHSH-type Bell inequality of 2.14 on average.

  • experimental nonlocality proof of Quantum Teleportation and entanglement swapping
    Physical Review Letters, 2001
    Co-Authors: Thomas Jennewein, Jian-wei Pan, Gregor Weihs, Anton Zeilinger
    Abstract:

    Quantum Teleportation strikingly underlines the peculiar features of the Quantum world. We present an experimental proof of its Quantum nature, teleporting an entangled photon with such high quality that the nonlocal Quantum correlations with its original partner photon are preserved. This procedure is also known as entanglement swapping. The nonlocality is confirmed by observing a violation of Bell's inequality by 4.5 standard deviations. Thus, by demonstrating Quantum nonlocality for photons that never interacted, our results directly confirm the Quantum nature of Teleportation.

  • experimental Quantum Teleportation
    Philosophical transactions - Royal Society. Mathematical physical and engineering sciences, 1998
    Co-Authors: Dirk Bouwmeester, Klaus Mattle, Jian-wei Pan, Harald Weinfurter, Manfred Eibl, Anton Zeilinger
    Abstract:

    Quantum entanglement lies at the heart of new proposals for Quantum communication and computation. Here we describe the recent experimental realization of Quantum Teleportation.

Varun B Verma - One of the best experts on this subject based on the ideXlab platform.

  • Quantum Teleportation across a metropolitan fibre network
    Nature Photonics, 2016
    Co-Authors: Raju Valivarthi, Varun B Verma, Sae Woo Nam, Marcel Li Grimau Puigibert, Qiang Zhou, G H Aguilar, Francesco Marsili, Matthew D Shaw, Daniel Oblak, Wolfgang Tittel
    Abstract:

    The first field test of Quantum Teleportation is implemented across a metropolitan fibre network with independent Quantum light sources. To establish a robust Quantum Teleportation system in the real world, several feedback mechanisms are developed.

  • Quantum Teleportation over 100 km of fiber using highly efficient superconducting nanowire single photon detectors
    Optica, 2015
    Co-Authors: Hiroki Takesue, Shellee D Dyer, Martin J Stevens, Varun B Verma, Richard P Mirin, Sae Woo Nam
    Abstract:

    Quantum Teleportation is an essential Quantum operation by which we can transfer an unknown Quantum state to a remote location with the help of Quantum entanglement and classical communication. Since the first experimental demonstrations using photonic qubits and continuous variables, the distance of photonic Quantum Teleportation over free-space channels has continued to increase and has reached >100  km. On the other hand, Quantum Teleportation over optical fiber has been challenging, mainly because the multifold photon detection that inevitably accompanies Quantum Teleportation experiments has been very inefficient due to the relatively low detection efficiencies of typical telecom-band single-photon detectors. Here, we report on Quantum Teleportation over optical fiber using four high-detection-efficiency superconducting nanowire single-photon detectors (SNSPDs). These SNSPDs make it possible to perform highly efficient multifold photon measurements, allowing us to confirm that the Quantum states of input photons were successfully teleported over 100 km of fiber with an average fidelity of 83.7±2.0%.

  • Quantum Teleportation over 100 km of fiber using highly efficient superconducting nanowire single photon detectors
    arXiv: Quantum Physics, 2015
    Co-Authors: Hiroki Takesue, Shellee D Dyer, Martin J Stevens, Varun B Verma, Richard P Mirin, Sae Woo Nam
    Abstract:

    Quantum Teleportation is an essential Quantum operation by which we can transfer an unknown Quantum state to a remote location with the help of Quantum entanglement and classical communication. Since the first experimental demonstrations using photonic qubits and continuous variables, the distance of photonic Quantum Teleportation over free space channels has continued to increase and has reached >100 km. On the other hand, Quantum Teleportation over optical fiber has been challenging, mainly because the multi-fold photon detection that inevitably accompanies Quantum Teleportation experiments has been very inefficient due to the relatively low detection efficiencies of typical telecom-band single photon detectors. Here, we report efficient Quantum Teleportation over optical fiber using four high-detection efficiency superconducting nanowire superconducting single-photon detectors (SNSPD) based on MoSi. These SNSPDs make it possible to perform highly-efficient multi-fold photon measurements, allowing us to confirm that the Quantum states of input photons were successfully teleported over 100 km of fiber.

  • Quantum Teleportation from a telecom wavelength photon to a solid state Quantum memory
    Nature Photonics, 2014
    Co-Authors: F. Bussières, C. Clausen, A. Tiranov, B. Korzh, A. Ferrier, Varun B Verma, Sae Woo Nam, Francesco Marsili
    Abstract:

    Quantum Teleportation of the state of a qubit encoded in the polarization state is demonstrated from a telecom-wavelength photon to a solid-state Quantum memory via 24.8 km of optical fibre. It is the longest distance ever reached in a Teleportation experiment involving a Quantum memory.

A. Ferrier - One of the best experts on this subject based on the ideXlab platform.

  • Quantum Teleportation from a telecom wavelength photon to a solid state Quantum memory
    Nature Photonics, 2014
    Co-Authors: F. Bussières, C. Clausen, A. Tiranov, B. Korzh, A. Ferrier, Varun B Verma, Sae Woo Nam, Francesco Marsili
    Abstract:

    Quantum Teleportation of the state of a qubit encoded in the polarization state is demonstrated from a telecom-wavelength photon to a solid-state Quantum memory via 24.8 km of optical fibre. It is the longest distance ever reached in a Teleportation experiment involving a Quantum memory.

  • Quantum Teleportation from a telecom-wavelength photon to a solid-state Quantum memory
    2014 Conference on Lasers and Electro-Optics (CLEO) - Laser Science to Photonic Applications, 2014
    Co-Authors: F. Bussières, C. Clausen, A. Tiranov, B. Korzh, V. Verma, S. W. Nam, F. Marsili, A. Ferrier, P. Goldner, H. Herrmann
    Abstract:

    Quantum Teleportation is a cornerstone of Quantum information science due to its essential role in several important tasks such as the long-distance transmission of Quantum information using Quantum repeaters. In this context, a challenge of paramount importance is the distribution of entanglement between remote nodes, and to use this entanglement as a resource for long-distance light-to-matter Quantum Teleportation. We report on the demonstration of Quantum Teleportation of the polarization state of a telecom-wavelength photon onto the state of a solid-state Quantum memory. Entanglement is established between a rare-earth-ion doped crystal storing a single photon that is polarization-entangled with a flying telecom-wavelength photon. The latter is jointly measured, using highly efficient superconducting WSi nanowire single-photon detectors, with another flying qubit carrying the polarization state to be teleported, which heralds the Teleportation. The fidelity of the polarization state of the photon retrieved from the memory is shown to be greater than the maximum fidelity achievable without entanglement, even when the combined distances travelled by the two flying qubits is 25 km of standard optical fibre. This light-to-matter Teleportation channel paves the way towards long-distance implementations of Quantum networks with solid-state Quantum memories.