Suppressing Coherent Two-Qubit Errors via Dynamical Decoupling

Qiu, Jiawei; Zhou, Yuxuan; Hu, Chang-Kang; Yuan, Jiahao; Zhang, Libo; Chu, Ji; Huang, W.; Liu, Weiyang; Luo, Kai; Ni, Zhongchu; Pan, X.; Yang, Zhi-Xuan; Zhang, Yimeng; Chen, Yuanzhen; Deng, Xiu-Hao; Hu, Ling; Li, Jian; Niu, Jingjing; Xu, Yuan; Yan, Tongxing; Zhong, Youpeng; Liu, Song; Yan, Fei; Yu, Dapeng

doi:10.1103/physrevapplied.16.054047

Cited by 14 publications

(9 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The processor is made of aluminum on sapphire following a similar recipe as described in Ref. [9]. It is mounted inside a dilution refrigerator at a base temperature of 10 mK.…”

Section: Device and Experimental Setup A Wiringmentioning

confidence: 99%

“…The latter are nontrivial multi-qubit quantum logics that perform unitary operations on target qubits conditioned on the states of all the control qubits. Relevant applications include quantum error correction [9][10][11], quantum simulation [12], and quantum machine learning [13]. One brute-force approach for an extensible implementation of these large operations is to decompose them into a finite set of universal gates.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Scalable algorithm simplification using quantum AND logic

Chu,

He,

Zhou

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

Implementing quantum algorithms on realistic hardware requires translating high-level global operations into sequences of native elementary gates, a process known as quantum compiling. Physical limitations, such as constraints in connectivity and gate alphabets, often result in unacceptable implementation costs. To enable successful near-term applications, it is crucial to optimize compilation by exploiting the potential capabilities of existing hardware. Here, we implement a resource-efficient construction for a quantum version of AND logic that can reduce the cost, enabling the execution of key quantum circuits. On a high-scalability superconducting quantum processor, we demonstrate low-depth synthesis of high-fidelity generalized Toffoli gates with up to 8 qubits and Grover's search algorithm in a search space of up to 64 entries; both are the largest such implementations in scale to date. Our experimental demonstration illustrates a scalable implementation of simplifying quantum algorithms, paving the way for larger, more meaningful quantum applications on noisy devices.

show abstract

“…The processor is made of aluminum on sapphire following a similar recipe as described in Ref. [9]. It is mounted inside a dilution refrigerator at a base temperature of 10 mK.…”

Section: Device and Experimental Setup A Wiringmentioning

confidence: 99%

mentioning

confidence: 99%

Scalable algorithm simplification using quantum AND logic

Chu,

He,

Zhou

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…Among the physical platforms candidate to the construction of quantum processors, superconducting circuit systems have stood out as a cutting-edge technology for the realization of a scalable quantum computer [9][10][11], in addition to being a promising platform to efficiently study quantum many-body physics [12][13][14][15]. Although superconducting circuits present a multilevel structure (artificial atoms), they can also be operated as two-level systems (qubits) to implement tunable interaction between the parts of a superconducting processor [16][17][18][19][20][21][22][23][24].…”

mentioning

confidence: 99%

“…In this paper, using two superconducting qubits allied with a frequency-tunable coupler [21], we demonstrate a coherent state-switchable transfer of information, effectively realizing a quantum transistor. The effective dynamics of the superconducting qubits with tunable interactions is investigated theoretically, which allows to identify the critical role of the third energy level.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Conditional coherent control with superconducting artificial atoms

Hu¹,

Yuan²,

Veloso³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

Robust oscillator-mediated phase gates driven by low-intensity pulses

Arrazola

Casanova

2023

Commun Phys

View full text Add to dashboard Cite

Robust qubit-qubit interactions mediated by bosonic modes are central to many quantum technologies. Existing proposals combining fast oscillator-mediated gates with dynamical decoupling require strong pulses or fast control over the qubit-boson coupling. Here, we present a method based on dynamical decoupling techniques that leads to faster-than-dispersive entanglement gates with low-intensity pulses. Our method is general, i.e., it is applicable to any quantum platform that has qubits interacting with bosonic mediators via longitudinal coupling. Moreover, the protocol provides robustness to fluctuations in qubit frequencies and control fields, while also being resistant to common errors such as frequency shifts and heating in the mediator as well as crosstalk effects. We illustrate our method with an implementation for trapped ions coupled via magnetic field gradients. With detailed numerical simulations, we show that entanglement gates with infidelities of 10−3 or 10−4 are possible with current or near-future experimental setups, respectively.

show abstract

Suppressing Coherent Two-Qubit Errors via Dynamical Decoupling

Cited by 14 publications

References 46 publications

Scalable algorithm simplification using quantum AND logic

Scalable algorithm simplification using quantum AND logic

Conditional coherent control with superconducting artificial atoms

Robust oscillator-mediated phase gates driven by low-intensity pulses

Contact Info

Product

Resources

About