134 citations · 379 across the 19 of their papers we have counts for
19 papers · 1 filter
A Scalable, Fast and Programmable Neural Decoder for Fault-Tolerant Quantum Computation Using Surface Codes
Mengyu Zhang, Xiangyu Ren, Guanglei Xi +6
Quantum error-correcting codes (QECCs) can eliminate the negative effects of quantum noise, the major obstacle to the execution of quantum algorithms. However, realizing practical…
Determination of Molecular Energies via Quantum Imaginary Time Evolution in a Superconducting Qubit System
Zhiwen Zong, Sainan Huai, Tianqi Cai +10
As a valid tool for solving ground state problems, imaginary time evolution (ITE) is widely used in physical and chemical simulations. Different ITE-based algorithms in their quant…
TensorCircuit: a Quantum Software Framework for the NISQ Era
Shi-Xin Zhang, Jonathan Allcock, Zhou-Quan Wan +13
TensorCircuit is an open source quantum circuit simulator based on tensor network contraction, designed for speed, flexibility and code efficiency. Written purely in Python, and bu…
Suppressing ZZ Crosstalk of Quantum Computers through Pulse and Scheduling Co-Optimization
Lei Xie, Jidong Zhai, Zhenxing Zhang +3
Noise is a significant obstacle to quantum computing, and crosstalk is one of the most destructive types of noise affecting superconducting qubits. Previous approaches to supp…
Exploiting Different Levels of Parallelism in the Quantum Control Microarchitecture for Superconducting Qubits
Mengyu Zhang, Lei Xie, Zhenxing Zhang +7
As current Noisy Intermediate Scale Quantum (NISQ) devices suffer from decoherence errors, any delay in the instruction execution of quantum control microarchitecture can lead to t…
Shortcuts to Adiabaticity for Open Systems in Circuit Quantum Electrodynamics
Zelong Yin, Chunzhen Li, Jonathan Allcock +5
Shortcuts to adiabaticity (STA) are powerful quantum control methods, allowing quick evolution into target states of otherwise slow adiabatic dynamics. Such methods have widespread…
Spectral Transfer Tensor Method for Non-Markovian Noise Characterization
Yu-Qin Chen, Yi-Cong Zheng, Shengyu Zhang +1
With continuing improvements on the quality of fabricated quantum devices, it becomes increasingly crucial to analyze noisy quantum process in greater details such as characterizin…
Constant depth fault-tolerant Clifford circuits for multi-qubit large block codes
Yi-Cong Zheng, Ching-Yi Lai, Todd A. Brun +1
Fault-tolerant quantum computation (FTQC) schemes using large block codes that encode qubits in physical qubits can potentially reduce the resource overhead to a great ex…
Security analysis of practical continuous-variable quantum key distribution systems under laser seeding attack
Yi Zheng, Peng Huang, Anqi Huang +2
Here, we investigate the security of the practical one-way CVQKD and CV-MDI-QKD systems under laser seeding attack. In particular, Eve can inject a suitable light into the laser di…
Non-Markovian Noise Characterization with the Transfer Tensor Method
Yu-Qin Chen, Kai-Li Ma, Yi-Cong Zheng +3
We propose simple protocols for performing quantum noise spectroscopy based on the method of transfer tensor maps (TTM), [Phys. Rev. Lett. 112, 110401 (2014)]. The TTM approach is…
Practical security of continuous-variable quantum key distribution with reduced optical attenuation
Yi Zheng, Peng Huang, Anqi Huang +2
In a practical CVQKD system, the optical attenuator can adjust the Gaussian-modulated coherent states and the local oscillator signal to an optimal value for guaranteeing the secur…
Depth reduction for quantum Clifford circuits through Pauli measurements
Yi-Cong Zheng, Ching-Yi Lai, Todd A. Brun +1
Clifford circuits play an important role in quantum computation. Gottesman and Chuang proposed a gate teleportation protocol so that a quantum circuit can be implemented by the tel…
Efficient Preparation of Large Block Code Ancilla States for Fault-tolerant Quantum Computation
Yi-Cong Zheng, Ching-Yi Lai, Todd A. Brun
Fault-tolerant quantum computation (FTQC) schemes that use multi-qubit large block codes can potentially reduce the resource overhead to a great extent. A major obstacle is the req…
A digital quantum simulator in the presence of a bath
Yi-Cong Zheng, Hui-Khoon Ng
For a digital quantum simulator (DQS) imitating a target system, we ask the following question: Under what conditions is the simulator dynamics similar to that of the target in the…
Fault-tolerant Preparation of Stabilizer States for Quantum CSS Codes by Classical Error-Correcting Codes
Ching-Yi Lai, Yi-Cong Zheng, Todd A. Brun
Stabilizer states are extensively studied in quantum information theory for their structures based on the Pauli group. Calderbank-Shor-Steane (CSS) stabilizer states are of particu…
Teleportation-based Fault-tolerant Quantum Computation in Multi-qubit Large Block Codes
Todd A. Brun, Yi-Cong Zheng, Kung-Chuan Hsu +2
A major goal for fault-tolerant quantum computation (FTQC) is to reduce the overhead needed for error correction. One approach is to use block codes that encode multiple qubits, wh…
Fault-tolerant Holonomic Quantum Computation in Surface Codes
Yi-Cong Zheng, Todd A. Brun
We show that universal holonomic quantum computation (HQC) can be achieved fault-tolerantly by adiabatically deforming the gapped stabilizer Hamiltonian of the surface code, where…
A Fault-Tolerant Scheme of Holonomic Quantum Computation on Stabilizer Codes with Robustness to Low-weight Thermal Noise
Yi-Cong Zheng, Todd A. Brun
We show an equivalence relation between fault-tolerant circuits for a stabilizer code and fault-tolerant adiabatic processes for holonomic quantum computation (HQC), in the case wh…
Geometric Manipulation of Ensembles of Atoms on Atom Chip for Quantum Computation
Yicong Zheng, Todd A. Brun
We propose a feasible scheme to achieve quantum computation based on geometric manipulation of ensembles of atoms, and analyze it for neutral rubidium atoms magnetically trapped in…