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Schrödinger-Heisenberg Variational Quantum Algorithms
Zhong-Xia Shang, Ming-Cheng Chen, Xiao Yuan +2
Recent breakthroughs have opened the possibility to intermediate-scale quantum computing with tens to hundreds of qubits, and shown the potential for solving classical challenging…
Implementation of a 46-node quantum metropolitan area network
Teng-Yun Chen, Xiao Jiang, Shi-Biao Tang +22
Quantum key distribution (QKD) enables secure key exchanges between two remote users. The ultimate goal of secure communication is to establish a global quantum network. The existi…
Universal quantum algorithmic cooling on a quantum computer
Pei Zeng, Jinzhao Sun, Xiao Yuan
Quantum cooling, a deterministic process that drives any state to the lowest eigenstate, has been widely used from studying ground state properties of chemistry and condensed matte…
Experimental quantum state measurement with classical shadows
Ting Zhang, Jinzhao Sun, Xiao-Xu Fang +3
A crucial subroutine for various quantum computing and communication algorithms is to efficiently extract different classical properties of quantum states. In a notable recent theo…
Perturbative quantum simulation
Jinzhao Sun, Suguru Endo, Huiping Lin +3
Approximation based on perturbation theory is the foundation for most of the quantitative predictions of quantum mechanics, whether in quantum many-body physics, chemistry, quantum…
Overlapped grouping measurement: A unified framework for measuring quantum states
Bujiao Wu, Jinzhao Sun, Qi Huang +1
Quantum algorithms designed for realistic quantum many-body systems, such as chemistry and materials, usually require a large number of measurements of the Hamiltonian. Exploiting…
Efficient measure for the expressivity of variational quantum algorithms
Yuxuan Du, Zhuozhuo Tu, Xiao Yuan +1
The superiority of variational quantum algorithms (VQAs) such as quantum neural networks (QNNs) and variational quantum eigen-solvers (VQEs) heavily depends on the expressivity of…
Exploiting anticommutation in Hamiltonian simulation
Qi Zhao, Xiao Yuan
Quantum computing can efficiently simulate Hamiltonian dynamics of many-body quantum physics, a task that is generally intractable with classical computers. The hardness lies at th…
Low-depth Quantum State Preparation
Xiao-Ming Zhang, Man-Hong Yung, Xiao Yuan
A crucial subroutine in quantum computing is to load the classical data of complex numbers into the amplitude of a superposed -qubit state. It has been…
Quantum Random Number Generation with Uncharacterized Laser and Sunlight
Yu-Huai Li, Xuan Han, Yuan Cao +8
The entropy or randomness source is an essential ingredient in random number generation. Quantum random number generators generally require well modeled and calibrated light source…