Showing 2023 · quant-phShow all

12 papers · 2 filters

quant-ph2023★ 22 cited

Tensor networks for interpretable and efficient quantum-inspired machine learning

Shi-Ju Ran, Gang Su

It is a critical challenge to simultaneously gain high interpretability and efficiency with the current schemes of deep machine learning (ML). Tensor network (TN), which is a well-…

quant-ph2023★ 4 cited

Quantum Simulation of Bound-State-Enhanced Quantum Metrology

Cheng-Ge Liu, Cong-Wei Lu, Na-Na Zhang +1

Quantum metrology explores quantum effects to improve the measurement accuracy of some physical quantities beyond the classical limit. However, due to the interaction between the s…

quant-ph2023★ 3 cited

Topological phases of many-body non-Hermitian systems

Kui Cao, Su-Peng Kou

We show that many-body fermionic non-Hermitian systems require two distinct sets of topological invariants to describe the topology of energy bands and quantum states respectively,…

quant-ph2023★ 13 cited

Sampling reduced density matrix to extract fine levels of entanglement spectrum and restore entanglement Hamiltonian

Bin-Bin Mao, Yi-Ming Ding, Zhe Wang +2

The reduced density matrix (RDM) plays a key role in quantum entanglement and measurement, as it allows the extraction of almost all physical quantities related to the reduced degr…

quant-ph2023★ 6 cited

Discrete time crystal in an open optomechanical system

Dongni Chen, Zhengyang Peng, Jiahui Li +2

The spontaneous breaking of time translation symmetry in periodically driven Floquet systems can lead to a discrete time crystal. Here we study the occurrence of such dynamical pha…

quant-ph2023★ 1 cited

Universal quantum gates by nonadiabatic holonomic evolution for the surface electron

Jun Wang, Wan-Ting He, Hai-Bo Wang +1

The nonadiabatic holonomic quantum computation based on the geometric phase is robust against the built-in noise and decoherence. In this work, we theoretically propose a scheme to…

quant-ph2023★ 51 cited

Non-Hermitian Chiral Skin Effect

Xinran Ma, Kui Cao, Xiaoran Wang +2

The interplay between non-Hermitian effects and topological insulators has become a frontier of research in non-Hermitian physics. However, the existence of a non-Hermitian skin ef…

quant-ph2023★ 6 cited

Finite-Time Optimization of Quantum Szilard heat engine

Tan-Ji Zhou, Yu-Han Ma, C. P. Sun

We propose a finite-time quantum Szilard engine (QSE) with a quantum particle with spin as the working substance (WS) to accelerate the operation of information engines. We introdu…

quant-ph2023★ 39 cited

Quantum interference and controllable magic cavity QED via a giant atom in coupled resonator waveguide

Xiaojun Zhang, Chengge Liu, Zhirui Gong +1

We study the Markovian and Non-Markovian dynamics in a giant atom system which couples to a coupled resonator waveguide (CRW) via two distant sites. Under certain conditions, we fi…

quant-ph2023★ 3 cited

Controlled-NOT gate based on the Rydberg states of surface electrons

Jun Wang, Wan-Ting He, Cong-Wei Lu +3

Due to the long coherence time and efficient manipulation, the surface electron (SE) provides a perfect two-dimensional platform for quantum computation and quantum simulation. In…

quant-ph2023★ 15 cited

Efficient Quantum Simulation of Electron-Phonon Systems by Variational Basis State Encoder

Weitang Li, Jiajun Ren, Sainan Huai +3

Digital quantum simulation of electron-phonon systems requires truncating infinite phonon levels into basis states and then encoding them with qubit computational basis. Unary…

quant-ph2023★ 2 cited

Sudden death of entanglement with Hamiltonian ensemble assisted by auxiliary qubits

Congwei Lu, Wanting He, Jun Wang +2

In this paper, we theoretically propose a method to simulate the longitudinal relaxation of a single qubit by coupling it to an auxiliary qubit. In order to mimic the finite-temper…