Measurement Based Quantum Computation Mbqc Video
Robert Raussendorf: \Consider: Measurement Based Quantum Computation Mbqc
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| IMPORTANCE OF THE EXECUTIVE BRANCH OF GOVERNMENT | 4 days ago · Phase-sensitive detection is the essential projective measurement for measurement-based continuous-variable quantum information processing. The bandwidth of conventional electrical phase-sensitive detectors is up to several gigahertz, which would limit the speed of quantum computation. It is theoretically proposed to realize terahertz-order detection bandwidth by using all . Oct 24, · Measurement-based quantum computation (MBQC) is a model of quantum computing in which the answer to a question is, informally speaking, created in the act of measuring the physical system that serves as the computer.: Quantum tomography. Quantum state tomography is . Nov 12, · A snapshot of where quantum computing is going. How the technology will be accessible in the future. How test-and-measurement solutions support the development of quantum-computing technology and applications. Quantum computing has earned its place on the Gartner hype cycle. Pundits have claimed that it will take over and change everything forever. |
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Measurement Based Quantum Computation Mbqc
Spin-based quantum computing is a leading technology for the realization of scalable quantum computers. Semiconductor quantum dots QDs are used to trap individual charges and the associated spins, which are then used as qubits. The Zurich Instruments Quantum Computing Control System QCCS provides all the key tools for spin qubit characterization, control and readout, providing a low-noise and scalable solution that Measueement setup reliability and simplifies setup control. Single spins are confined in semiconductors quantum dots. Metallic gates define them and control the relative couplings. A large quantum dot is used more info a charge sensor for the smaller ones which are serving as qubits. Measurement Based Quantum Computation Mbqc qubit operations are induced through an oscillating magnetic field coupled to the qubits through microwave strip lines.
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Two qubits gates can be realized with fast pulses on those metallic gates which are close to two quantum dots. The integrated low noise current amplifier is able to amplify the small current flowing through a typical QD and the multiple oscillators are set to different frequencies to simultaneously acquire DC conductance, low-frequency conductance and gate trans-impedance. The digitizer function can be used to acquire fast current traces to perform single-shot spin readout. The HDAWG multi-channel Arbitrary Waveform Generator generates the fast pulses for the metallic gates which are used to control the QD energy levels and couplings and to drive the two-qubit gates. To counteract the effect of cross-coupling, additional pulses are applied to multiple gates.
Different qubits can be addressed with frequency multiplexing. A single-sideband modulation scheme, in conjunction with the internal oscillators, suppresses unwanted images and facilitates a clean spectrum.
Application Description
The spin-readout speed is greatly improved when performed at high frequency with RF reflectometry. Up to eight sensing dots can be multiplexed and read simultaneously. The magnitude or the phase of the demodulated signals is a measure of the complex impedance of the charge sensor, from which the qubit state can be measured. The QCCS provides all the critical components to characterize and control a complex spin qubit system. Hanson, R.
1. Introduction
Fast multiplexed qubit control The HDAWG multi-channel Arbitrary Waveform Generator generates the fast pulses for the metallic gates which are used to control the QD energy levels and couplings and to drive the two-qubit gates. A high level of integration guarantees low setup complexity and maintenance effort: Current amplifier, multimeter, lock-in amplifier and digitizer are found in a single unit.
A reduced need for isolation and filtering leads to low power dissipation at the input connectors. Experience accurate spin control and enhanced fidelity, also for fast qubits, thanks to the fast and low-noise HDAWG outputs. You can run advanced and complex experiments with the real-time sequencer. Gain access to a clear pathway to larger numbers of qubits: control many multiplexed qubits with the internal oscillators and the large output bandwidth.
The QCCS is a future-proof investment that optimizes your workflows and setup performance. Qubit control for qubits and more. Spins in few-electron quantum dots Rev. Crippa, A.]
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