The Experts below are selected from a list of 24636 Experts worldwide ranked by ideXlab platform

Ping Zhou - One of the best experts on this subject based on the ideXlab platform.

  • parallel remote state preparation of arbitrary Single Qubit states via linear optical elements by using hyperentangled bell states as the quantum channel
    Quantum Information Processing, 2018
    Co-Authors: Ping Zhou, Xianfang Jiao
    Abstract:

    It is well known that transmitting quantum states remotely is one of central tasks in quantum information processing. Until now, there are some important works in remote state preparation, the efficient method to transmit quantum states remotely. However, most of them are focused on remote state preparation via one degree of freedom (DOF) of quantum systems. In this article, we investigate the possibility of performing parallel quantum remote state preparation based on two DOFs of photons. We proposed a protocol for parallel remote preparation of arbitrary Single-Qubit states via hyperentangled photons which are entangled in both spatial-mode DOF and polarization DOF simultaneously. The sender performs unitary operations on his hyperentangled photon according to his knowledge of prepared states; the receiver can reconstruct the original states on his hyperentangled photon if he cooperates with the sender. The scheme has the advantage of having less quantum entanglement cost and classical communication. Moreover, we also discuss the scheme for recursive remote preparation of arbitrary Single-Qubit states via partially hyperentangled Bell states.

  • joint remote control of an arbitrary Single Qubit state by using a multiparticle entangled state as the quantum channel
    Quantum Information Processing, 2018
    Co-Authors: Zhengwei Zhao, Ping Zhou
    Abstract:

    We present a scheme for joint remote implementation of an arbitrary Single-Qubit operation following some ideas in one-way quantum computation. All the senders share the information of implemented quantum operation and perform corresponding Single-Qubit measurements according to their information of implemented operation. An arbitrary Single-Qubit operation can be implemented upon the remote receiver’s quantum system if the receiver cooperates with all the senders. Moreover, we study the protocol of multiparty joint remote implementation of an arbitrary Single-Qubit operation with many senders by using a multiparticle entangled state as the quantum channel.

David J. Wineland - One of the best experts on this subject based on the ideXlab platform.

  • Single Qubit gate error below 10 4 in a trapped ion
    Physical Review A, 2011
    Co-Authors: K.r. Brown, A. M. Meier, Yves Colombe, Christian Ospelkaus, D Leibfried, Emanuel Knill, A C Wilson, David J. Wineland
    Abstract:

    With a ${}^{9}{\mathrm{Be}}^{+}$ trapped-ion hyperfine-state Qubit, we demonstrate an error probability per randomized Single-Qubit gate of $2.0(2)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$, below the threshold estimate of ${10}^{\ensuremath{-}4}$ commonly considered sufficient for fault-tolerant quantum computing. The ${}^{9}{\mathrm{Be}}^{+}$ ion is trapped above a microfabricated surface-electrode ion trap and is manipulated with microwaves applied to a trap electrode. The achievement of low Single-Qubit-gate errors is an essential step toward the construction of a scalable quantum computer.

  • Single-Qubit-gate error below 10-4 in a trapped ion
    Physical Review A - Atomic Molecular and Optical Physics, 2011
    Co-Authors: K.r. Brown, A. M. Meier, Yves Colombe, Christian Ospelkaus, D Leibfried, Emanuel Knill, A C Wilson, David J. Wineland
    Abstract:

    With a 9Be+ trapped-ion hyperfine-states Qubit, we demonstrate an error probability per randomized Single-Qubit gate of 2.0(2) x 10^-5, below the threshold estimate of 10^-4 commonly considered sufficient for fault-tolerant quantum computing. The 9Be+ ion is trapped above a microfabricated surface-electrode ion trap and is manipulated with microwaves applied to a trap electrode. The achievement of low Single-Qubit-gate errors is an essential step toward the construction of a scalable quantum computer.

K.r. Brown - One of the best experts on this subject based on the ideXlab platform.

  • universal control of ion Qubits in a scalable microfabricated planar trap
    New Journal of Physics, 2016
    Co-Authors: Creston Herold, A. M. Meier, K.r. Brown, J T Merrill, Curtis Volin, Spencer D Fallek, J M Amini
    Abstract:

    We demonstrate universal quantum control over chains of ions in a surface-electrode ion trap, including all the fundamental operations necessary to perform algorithms in a one-dimensional, nearest-neighbor quantum computing architecture. We realize both Single-Qubit operations and nearest-neighbor entangling gates with Raman laser beams, and we interleave the two gate types. We report average Single-Qubit gate fidelities as high as 0.970(1) for two-, three-, and four-ion chains, characterized with randomized benchmarking. We generate Bell states between the nearest-neighbor pairs of a three-ion chain, with fidelity up to 0.84(2). We combine one- and two-Qubit gates to perform quantum process tomography of a cnot gate in a two-ion chain, and we report an overall fidelity of 0.76(3).

  • Single Qubit gate error below 10 4 in a trapped ion
    Physical Review A, 2011
    Co-Authors: K.r. Brown, A. M. Meier, Yves Colombe, Christian Ospelkaus, D Leibfried, Emanuel Knill, A C Wilson, David J. Wineland
    Abstract:

    With a ${}^{9}{\mathrm{Be}}^{+}$ trapped-ion hyperfine-state Qubit, we demonstrate an error probability per randomized Single-Qubit gate of $2.0(2)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$, below the threshold estimate of ${10}^{\ensuremath{-}4}$ commonly considered sufficient for fault-tolerant quantum computing. The ${}^{9}{\mathrm{Be}}^{+}$ ion is trapped above a microfabricated surface-electrode ion trap and is manipulated with microwaves applied to a trap electrode. The achievement of low Single-Qubit-gate errors is an essential step toward the construction of a scalable quantum computer.

  • Single-Qubit-gate error below 10-4 in a trapped ion
    Physical Review A - Atomic Molecular and Optical Physics, 2011
    Co-Authors: K.r. Brown, A. M. Meier, Yves Colombe, Christian Ospelkaus, D Leibfried, Emanuel Knill, A C Wilson, David J. Wineland
    Abstract:

    With a 9Be+ trapped-ion hyperfine-states Qubit, we demonstrate an error probability per randomized Single-Qubit gate of 2.0(2) x 10^-5, below the threshold estimate of 10^-4 commonly considered sufficient for fault-tolerant quantum computing. The 9Be+ ion is trapped above a microfabricated surface-electrode ion trap and is manipulated with microwaves applied to a trap electrode. The achievement of low Single-Qubit-gate errors is an essential step toward the construction of a scalable quantum computer.

Yipu Song - One of the best experts on this subject based on the ideXlab platform.

  • Single loop realization of arbitrary nonadiabatic holonomic Single Qubit quantum gates in a superconducting circuit
    Physical Review Letters, 2018
    Co-Authors: Yuan Xu, Xianghao Mu, Ling Hu, Tao Chen, Haiyan Wang, Yipu Song
    Abstract:

    : Geometric phases are noise resilient, and thus provide a robust way towards high-fidelity quantum manipulation. Here we experimentally demonstrate arbitrary nonadiabatic holonomic Single-Qubit quantum gates for both a superconducting transmon Qubit and a microwave cavity in a Single-loop way. In both cases, an auxiliary state is utilized, and two resonant microwave drives are simultaneously applied with well-controlled but varying amplitudes and phases for the arbitrariness of the gate. The resulting gates on the transmon Qubit achieve a fidelity of 0.996 characterized by randomized benchmarking and the ones on the cavity show an averaged fidelity of 0.978 based on a full quantum process tomography. In principle, a nontrivial two-Qubit holonomic gate between the Qubit and the cavity can also be realized based on our presented experimental scheme. Our experiment thus paves the way towards practical nonadiabatic holonomic quantum manipulation with both Qubits and cavities in a superconducting circuit.

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

  • universal control of ion Qubits in a scalable microfabricated planar trap
    New Journal of Physics, 2016
    Co-Authors: Creston Herold, A. M. Meier, K.r. Brown, J T Merrill, Curtis Volin, Spencer D Fallek, J M Amini
    Abstract:

    We demonstrate universal quantum control over chains of ions in a surface-electrode ion trap, including all the fundamental operations necessary to perform algorithms in a one-dimensional, nearest-neighbor quantum computing architecture. We realize both Single-Qubit operations and nearest-neighbor entangling gates with Raman laser beams, and we interleave the two gate types. We report average Single-Qubit gate fidelities as high as 0.970(1) for two-, three-, and four-ion chains, characterized with randomized benchmarking. We generate Bell states between the nearest-neighbor pairs of a three-ion chain, with fidelity up to 0.84(2). We combine one- and two-Qubit gates to perform quantum process tomography of a cnot gate in a two-ion chain, and we report an overall fidelity of 0.76(3).

  • Single Qubit gate error below 10 4 in a trapped ion
    Physical Review A, 2011
    Co-Authors: K.r. Brown, A. M. Meier, Yves Colombe, Christian Ospelkaus, D Leibfried, Emanuel Knill, A C Wilson, David J. Wineland
    Abstract:

    With a ${}^{9}{\mathrm{Be}}^{+}$ trapped-ion hyperfine-state Qubit, we demonstrate an error probability per randomized Single-Qubit gate of $2.0(2)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$, below the threshold estimate of ${10}^{\ensuremath{-}4}$ commonly considered sufficient for fault-tolerant quantum computing. The ${}^{9}{\mathrm{Be}}^{+}$ ion is trapped above a microfabricated surface-electrode ion trap and is manipulated with microwaves applied to a trap electrode. The achievement of low Single-Qubit-gate errors is an essential step toward the construction of a scalable quantum computer.

  • Single-Qubit-gate error below 10-4 in a trapped ion
    Physical Review A - Atomic Molecular and Optical Physics, 2011
    Co-Authors: K.r. Brown, A. M. Meier, Yves Colombe, Christian Ospelkaus, D Leibfried, Emanuel Knill, A C Wilson, David J. Wineland
    Abstract:

    With a 9Be+ trapped-ion hyperfine-states Qubit, we demonstrate an error probability per randomized Single-Qubit gate of 2.0(2) x 10^-5, below the threshold estimate of 10^-4 commonly considered sufficient for fault-tolerant quantum computing. The 9Be+ ion is trapped above a microfabricated surface-electrode ion trap and is manipulated with microwaves applied to a trap electrode. The achievement of low Single-Qubit-gate errors is an essential step toward the construction of a scalable quantum computer.