Publications (19)
Implementation and topological characterization of Weyl exceptional rings in quantum-mechanical systems
Hao-Long Zhang, Pei-Rong Han, Xue-Jia Yu +8
Non-Hermiticity can lead to the emergence of many intriguing phenomena that are absent in Hermitian systems, enabled by exceptional topological defects, among which Weyl exceptiona…
Dissipation-accelerated entanglement generation
Xiao-Wei Zheng, Jun-Cong Zheng, Xue-Feng Pan +3
Dissipation is usually considered a negative factor for observing quantum effects and for harnessing them for quantum technologies. Here we propose a scheme for speeding up the gen…
Measuring topological invariants for higher-order exceptional points in quantum three-mode systems
Pei-Rong Han, Wen Ning, Xin-Jie Huang +7
Owing to the presence of exceptional points (EPs), non-Hermitian (NH) systems can display intriguing topological phenomena without Hermitian analogs. However, experimental characte…
Enhancement of sensitivity near exceptional points in dissipative qubit-resonator systems
Pei-Rong Han, Fan Wu, Xin-Jie Huang +11
Dissipation usually plays a negative role in quantum metrological technologies, which aim to improve measurement precision by leveraging quantum effects that are vulnerable to envi…
Exceptional entanglement phenomena: non-Hermiticity meeting non-classicality
Pei-Rong Han, Fan Wu, Xin-Jie Huang +11
Non-Hermitian (NH) extension of quantum-mechanical Hamiltonians represents one of the most significant advancements in physics. During the past two decades, numerous captivating NH…
Non-Hermitian topology in a single driven-dissipative Kerr-Cat qubit
Pei-Rong Han, Huiye Qiu, Hao-Long Zhang +3
The intriguing physical phenomena associated with exceptional points have established non-Hermitian physics as a frontier of modern research. Recent investigations have extended no…
Exceptional phase transition in a single Kerr-cat qubit
Pei-Rong Han, Tian-Le Yang, Wen Ning +4
Exceptional points in non-Hermitian quantum systems give rise to novel genuine quantum phenomena. Recent explorations of exceptional-point-induced quantum phase transitions have ex…
Deterministic entanglement swapping in a superconducting circuit
Wen Ning, Xin-Jie Huang, Pei-Rong Han +8
Entanglement swapping, the process to entangle two particles without coupling them in any way, is one of the most striking manifestations of the quantum-mechanical nonlocal charact…
Controllable non-Hermitian topology in a dynamically protected cat qubit
Tian-Le Yang, Pei-Rong Han, Zhen-Biao Yang +1
Dissipatively stabilized cat qubits are promising for fault-tolerant quantum information processing, yet their non-Hermitian (NH) spectral topology remains largely unexplored. We u…
An exceptional surface and its topology
Shou-Bang Yang, Pei-Rong Han, Wen Ning +3
Non-Hermitian (NH) systems can display exceptional topological defects without Hermitian counterparts, exemplified by exceptional rings in NH two-dimensional systems. However, exce…
Experimental demonstration of entanglement-enabled universal quantum cloning in a circuit
Zhen-Biao Yang, Pei-Rong Han, Xin-Jie Huang +6
No-cloning theorem forbids perfect cloning of an unknown quantum state. A universal quantum cloning machine (UQCM), capable of producing two copies of any input qubit with the opti…
Exploring the topology induced by non-Markovian Liouvillian exceptional points
Hao-Long Zhang, Yan Wang, Wen Ning +6
Non-Hermitian (NH) systems can display exotic topological phenomena without Hermitian counterparts, enabled by exceptional points (EPs). So far, investigations of NH topology have…
Mixed-State Topology in Non-Hermitian Systems
Shou-Bang Yang, Pei-Rong Han, Wen Ning +3
Non-Hermitian (NH) systems, owing to the existence of exceptional point (or ring and surface), exhibit exotic topological features which are inaccessible in Hermitian systems. Whil…
A hypersphere-like non-Abelian Yang monopole and its topological characterization
Shou-Bang Yang, Pei-Rong Han, Wen Ning +3
Synthetic monopoles, which correspond to degeneracies of Hamiltonians, play a central role in understanding exotic topological phenomena. Dissipation-induced non-Herminicity (NH),…
Demonstration of a non-Abelian geometric controlled-Not gate in a superconducting circuit
Kai Xu, Wen Ning, Xin-Jie Huang +6
Holonomies, arising from non-Abelian geometric transformations of quantum states in Hilbert space, offer a promising way for quantum computation. These holonomies are not commutabl…
Experimental observation of non-Markovian quantum exceptional points
Hao-Long Zhang, Pei-Rong Han, Fan Wu +3
One of the most remarkable features that distinguish open systems from closed ones is the presence of exceptional points (EPs), where two or more eigenvectors of a non-Hermitian op…
Quantum metric and metrology with parametrically-driven Tavis-Cummings models
Jia-Hao Lü, Pei-Rong Han, Wen Ning +5
We study the quantum metric in a driven Tavis-Cummings model, comprised of multiple qubits interacting with a quantized photonic field. The parametrical driving of the photonic fie…
Characterization of non-Markovianity with maximal extractable qubit-reservoir entanglement
Pei-Rong Han, Fan Wu, Xin-Jie Huang +5
Understanding the dynamical behavior of a qubit in a reservoir is critical to applications in quantum technological protocols, ranging from quantum computation to quantum metrology…
Entanglement-interference complementarity and experimental demonstration in a superconducting circuit
Xin-Jie Huang, Pei-Rong Han, Wen Ning +12
Quantum entanglement between an interfering particle and a detector for acquiring the which-path information plays a central role for enforcing Bohr's complementarity principle. Ho…