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Digital waveform adjustment method for quantum bit control

A digital waveform and adjustment method technology, applied in the field of quantum systems, can solve problems such as crosstalk, qubits are susceptible to interference, qubit information loss, etc., and achieve the effect of improving control accuracy

Active Publication Date: 2016-08-31
INST OF PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The development of superconducting quantum computers is restricted in many aspects: on the one hand, qubits are very susceptible to interference, causing decoherence of qubits, and the information stored in qubits will slowly lose; During operation, crosstalk, waveform distortion, noise, etc. will cause operation errors

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  • Digital waveform adjustment method for quantum bit control
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  • Digital waveform adjustment method for quantum bit control

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Embodiment Construction

[0031] figure 1 is a schematic waveform diagram of the control pulse function f(t) of a digital waveform adjustment method for qubit manipulation according to an embodiment of the present invention; figure 2 is based on figure 1 The cosine oscillation function f decomposed by the control pulse shown 1 (t) a schematic diagram of the waveform; image 3 is based on figure 1 The square wave pulse function f decomposed from the control pulse shown 2 (t) Schematic diagram of the waveform.

[0032] In most cases, the operation of a qubit consists of a series of control pulses. Control pulses can be generated using a waveform generator (Arbitrary Waveform Generator, AWG for short), and control pulses in lower frequency bands (eg, below 1 GHz) can be generated using an arbitrary waveform generator. The control pulse can be used as figure 1 The control pulse function f(t) shown to describe, figure 1 The abscissa is the time t in nanoseconds (ns), and the ordinate is the amplitu...

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Abstract

The present invention provides a digital waveform adjustment method for quantum bit control, and belongs to the quantum system field. The quantum bit control is composed of a series of control pulses. The digital waveform adjustment method comprises generating the control pulses by a waveform generator; decomposing the control pulses into different pulse function relationships; preprocessing the decomposed pulse functions; and composing the preprocessed pulse function relationships and using the waveform generator to generate the control pulses, and performing the quantum bit control. According to the digital waveform adjustment method for the quantum bit control, operating errors caused by factors such as crosstalk, waveform distortion and noise during the quantum bit control can be prevented, and therefore quantum bit control precision can be improved.

Description

technical field [0001] The invention relates to the field of quantum systems, in particular to a digital waveform adjustment method for qubit manipulation. Background technique [0002] Quantum computing is superior to known classical computing algorithms in terms of the speed of solving mathematical problems such as factorization of large prime numbers and global search. Some simple quantum algorithms have been implemented in many different quantum systems, and the superconducting qubit system is one of the most promising systems. [0003] The development of superconducting quantum computers is constrained by many aspects: on the one hand, qubits are very susceptible to interference, causing decoherence of qubits, and the information stored in qubits will be slowly lost; During operation, crosstalk, waveform distortion, noise, etc. will cause operation errors. According to the existing quantum error correction theory, the operation accuracy of qubits needs to reach a cert...

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Application Information

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IPC IPC(8): G06F1/02
CPCG06F1/022
Inventor 娜希德·阿克塔吴玉林郑亚锐邓辉穆达萨·纳齐黄克强郭学仪闫智广宁鲁慧金贻荣朱晓波郑东宁
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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