The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
A. Ferrier - One of the best experts on this subject based on the ideXlab platform.
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quantum Teleportation from a telecom wavelength photon to a solid state quantum memory
Nature Photonics, 2014Co-Authors: F. Bussières, C. Clausen, A. Tiranov, B. Korzh, A. Ferrier, Varun B Verma, Sae Woo Nam, Francesco MarsiliAbstract: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.
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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, 2014Co-Authors: F. Bussières, C. Clausen, A. Tiranov, B. Korzh, V. Verma, S. W. Nam, F. Marsili, A. Ferrier, P. Goldner, H. HerrmannAbstract: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.
Sae Woo Nam - One of the best experts on this subject based on the ideXlab platform.
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quantum Teleportation across a metropolitan fibre network
Nature Photonics, 2016Co-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 TittelAbstract: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.
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quantum Teleportation over 100 km of fiber using highly efficient superconducting nanowire single photon detectors
Optica, 2015Co-Authors: Hiroki Takesue, Shellee D Dyer, Martin J Stevens, Varun B Verma, Richard P Mirin, Sae Woo NamAbstract: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%.
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quantum Teleportation over 100 km of fiber using highly efficient superconducting nanowire single photon detectors
arXiv: Quantum Physics, 2015Co-Authors: Hiroki Takesue, Shellee D Dyer, Martin J Stevens, Varun B Verma, Richard P Mirin, Sae Woo NamAbstract: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.
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quantum Teleportation from a telecom wavelength photon to a solid state quantum memory
Nature Photonics, 2014Co-Authors: F. Bussières, C. Clausen, A. Tiranov, B. Korzh, A. Ferrier, Varun B Verma, Sae Woo Nam, Francesco MarsiliAbstract: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.
Varun B Verma - One of the best experts on this subject based on the ideXlab platform.
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quantum Teleportation across a metropolitan fibre network
Nature Photonics, 2016Co-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 TittelAbstract: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.
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quantum Teleportation over 100 km of fiber using highly efficient superconducting nanowire single photon detectors
Optica, 2015Co-Authors: Hiroki Takesue, Shellee D Dyer, Martin J Stevens, Varun B Verma, Richard P Mirin, Sae Woo NamAbstract: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%.
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quantum Teleportation over 100 km of fiber using highly efficient superconducting nanowire single photon detectors
arXiv: Quantum Physics, 2015Co-Authors: Hiroki Takesue, Shellee D Dyer, Martin J Stevens, Varun B Verma, Richard P Mirin, Sae Woo NamAbstract: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.
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quantum Teleportation from a telecom wavelength photon to a solid state quantum memory
Nature Photonics, 2014Co-Authors: F. Bussières, C. Clausen, A. Tiranov, B. Korzh, A. Ferrier, Varun B Verma, Sae Woo Nam, Francesco MarsiliAbstract: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.
Akira Furusawa - One of the best experts on this subject based on the ideXlab platform.
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deterministic quantum Teleportation of photonic quantum bits by a hybrid technique
Nature, 2013Co-Authors: Shuntaro Takeda, Takahiro Mizuta, Maria Fuwa, Peter Van Loock, Akira FurusawaAbstract:The continuous-variable Teleportation of a discrete-variable, photonic qubit is deterministic and allows for faithful qubit transfer even with imperfect continuous-variable entangled states: for four qubits, the overall transfer fidelities all exceed the classical limit of Teleportation. Quantum Teleportation is one of the most important elementary protocols in quantum information processing. Previous studies have achieved quantum Teleportation, but usually randomly and at low rates. Two groups reporting in this issue of Nature have used contrasting methods to achieve the same aim —more efficient quantum Teleportation. Takeda et al. describe the experimental realization of fully deterministic, unconditional quantum Teleportation of photonic qubits — an optimum choice for information carrying — with overall transfer fidelities exceeding the classical limit of Teleportation. The technique may facilitate the development of large-scale optical quantum networks. Steffen et al. report quantum Teleportation in a solid-state system, achieving deterministic quantum Teleportation in a chip-based superconducting circuit architecture. They teleport quantum states between two macroscopic systems separated by 6 mm at a rate of 10,000 per second, exceeding other reported implementations. Transmission loss in superconducting waveguides is low, so this system should be scalable to significantly larger distances, a step towards quantum communication at microwave frequencies. Quantum Teleportation1 allows for the transfer of arbitrary unknown quantum states from a sender to a spatially distant receiver, provided that the two parties share an entangled state and can communicate classically. It is the essence of many sophisticated protocols for quantum communication and computation2,3,4,5. Photons are an optimal choice for carrying information in the form of ‘flying qubits’, but the Teleportation of photonic quantum bits6,7,8,9,10,11 (qubits) has been limited by experimental inefficiencies and restrictions. Main disadvantages include the fundamentally probabilistic nature of linear-optics Bell measurements12, as well as the need either to destroy the teleported qubit or attenuate the input qubit when the detectors do not resolve photon numbers13. Here we experimentally realize fully deterministic quantum Teleportation of photonic qubits without post-selection. The key step is to make use of a hybrid technique involving continuous-variable Teleportation14,15,16 of a discrete-variable, photonic qubit. When the receiver’s feedforward gain is optimally tuned, the continuous-variable teleporter acts as a pure loss channel17,18, and the input dual-rail-encoded qubit, based on a single photon, represents a quantum error detection code against photon loss19 and hence remains completely intact for most Teleportation events. This allows for a faithful qubit transfer even with imperfect continuous-variable entangled states: for four qubits the overall transfer fidelities range from 0.79 to 0.82 and all of them exceed the classical limit of Teleportation. Furthermore, even for a relatively low level of the entanglement, qubits are teleported much more efficiently than in previous experiments, albeit post-selectively (taking into account only the qubit subspaces), and with a fidelity comparable to the previously reported values.
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quantum Teleportation and entanglement a hybrid approach to optical quantum information processing
2011Co-Authors: Akira Furusawa, Peter Van LoockAbstract:Part I: Introductions and Basics 1. Introduction to Quantum Information Processing 2. Introduction to Optical Quantum Information Processing Part II: Fundamental Resources and Protocols 3. Entanglement 4. Quantum Teleportation 5. Quantum Error Correction Part III: Measurement-based and Hybrid Approaches 6. Quantum Teleportation of Gates 7. Cluster-based Quantum Information Processing 8. Hybrid Quantum Information Processing
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entanglement distillation from gaussian input states
Nature Photonics, 2010Co-Authors: Jonas S Neergaardnielse, Makoto Takeuchi, Masahiro Takeoka, Kazuhiro Hayasaka, Akira Furusawa, Hiroki Takahashi, Masahide SasakiAbstract:Entanglement distillation is an essential protocol for long-distance quantum communications1, typically for extending the range of quantum key distribution. In the field of continuous variable quantum information processing, quantum as well as classical information is encoded in the light field quadratures, often in the form of Gaussian states. However, distillation from Gaussian input states has not yet been accomplished. It is made difficult by a prominent no-go theorem stating that no Gaussian operation can distill Gaussian states2,3,4. Here we demonstrate, for the first time, such distillation from Gaussian input states, realized by the implementation of non-Gaussian operations. By subtracting one or two photons, a large gain of entanglement was observed. For two photons, Gaussian-like entanglement was also improved. Other than quantum key distribution, this distilled entanglement can also be used for downstream applications such as high-fidelity quantum Teleportation5 and a loophole-free Bell test6,7. Distillation of entangled photons is essential for applications such as long-distance quantum communication and high-fidelity quantum Teleportation. Distillation from Gaussian input states is experimentally realized, resulting in a large gain in entanglement.
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Demonstration of a quantum Teleportation network for continuous variables
Nature, 2004Co-Authors: Hidehiro Yonezawa, Takao Aoki, Akira FurusawaAbstract:Quantum Teleportation^ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 involves the transportation of an unknown quantum state from one location to another, without physical transfer of the information carrier. Although quantum Teleportation is a naturally bipartite process, it can be extended to a multipartite protocol known as a quantum Teleportation network^ 9 . In such a network, entanglement is shared between three or more parties. For the case of three parties (a tripartite network), Teleportation of a quantum state can occur between any pair, but only with the assistance of the third party. Multipartite quantum protocols are expected to form fundamental components for larger-scale quantum communication and computation^ 10 , 11 . Here we report the experimental realization of a tripartite quantum Teleportation network for quantum states of continuous variables (electromagnetic field modes). We demonstrate Teleportation of a coherent state between three different pairs in the network, unambiguously demonstrating its tripartite character.
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continuous variable Teleportation of single photon states proceedings version
arXiv: Quantum Physics, 2001Co-Authors: Toshiki Ide, Holger F Hofmann, Takayoshi Kobayashi, Akira FurusawaAbstract:We investigate the changes to a single photon state caused by the non-maximal entanglement in continuous variable quantum Teleportation. It is shown that the Teleportation measurement introduces field coherence in the output.
Prasanta K Panigrahi - One of the best experts on this subject based on the ideXlab platform.
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experimental realization of quantum Teleportation of an arbitrary two qubit state using a four qubit cluster state
Quantum Information Processing, 2020Co-Authors: Sk Rajiuddin, Alakesh Baishya, Bikash K Behera, Prasanta K PanigrahiAbstract:Quantum Teleportation is extensively used in quantum communication where a sender sends a information to a receiver at a large distance through a quantum entangled channel. Li and Cao (Commun Theor Phys 47(3):464, 2007) proposed a theoretical scheme for Teleportation of a two-particle entangled state via cluster state. Here, we present the above scheme of Teleportation for an arbitrary state by using a four-qubit cluster state. We demonstrate the scheme on the IBM quantum computer by designing appropriate quantum circuits using single-qubit and two-qubit quantum gates. We collect the experimental results with good fidelity revealing the Teleportation of an arbitrary two-qubit state using a four-qubit cluster state.
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Perfect Teleportation, quantum-state sharing, and superdense coding through a genuinely entangled five-qubit state
Physical Review A, 2008Co-Authors: Sreraman Muralidharan, Prasanta K PanigrahiAbstract:We investigate the usefulness of a recently introduced five qubit state by Brown $\it et al. \normalfont$ \cite{Brown} for quantum Teleportation, quantum state sharing and superdense coding. It is shown that this five-qubit state can be utilized for perfect Teleportation of arbitrary single and two qubit systems. We devise various schemes for quantum state sharing of an arbitrary single and two particle state via cooperative Teleportation. We later show that this state can be used for superdense coding as well. It is found that five classical bits can be sent by sending only three quantum bits.
