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Observation of exceptional point in a PT broken non-Hermitian system simulated using a quantum circuit
- Source :
- Scientific Reports, Scientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
- Publication Year :
- 2021
- Publisher :
- Nature Publishing Group UK, 2021.
-
Abstract
- Exceptional points (EPs), the degeneracy point of non-Hermitian systems, have recently attracted great attention after its ability to greatly enhance the sensitivity of micro-cavities is demonstrated experimentally. Unlike the usual degeneracies in Hermitian systems, at EPs, both the eigenenergies and eigenvectors coalesce. Although some of the exotic properties and potential applications of EPs are explored, the range of EPs studied is largely limited by the experimental capability. Some of the systems, e.g. with higher-order EPs, are hard to achieve with conventional simulations. Here we propose an extendable method to simulate non-Hermitian systems on the quantum circuits, where a wide range of EPs can be studied. The system is inherently parity-time (PT) broken due to the non-symmetric controlling effects and post-selection. A sample circuit is implemented in a quantum programming framework, and the phase transition at EP is demonstrated. Considering the scalable and flexible nature of quantum circuits, our model is capable of simulating large scale systems with higher-order EPs. We believe this work may lead to broader applications of quantum computers and provide a tool to the studies for non-Hermitian systems and the associated EPs.
- Subjects :
- Quantum programming
Science
FOS: Physical sciences
Computer Science::Computational Geometry
Topology
01 natural sciences
Article
010305 fluids & plasmas
Quantum circuit
0103 physical sciences
010306 general physics
Computer Science::Data Structures and Algorithms
Quantum
Eigenvalues and eigenvectors
computer.programming_language
Quantum Zeno effect
Physics
Quantum Physics
Multidisciplinary
Quantum sensor
Hermitian matrix
Medicine
Quantum simulation
Quantum Physics (quant-ph)
Degeneracy (mathematics)
computer
Qubits
Subjects
Details
- Language :
- English
- ISSN :
- 20452322
- Volume :
- 11
- Database :
- OpenAIRE
- Journal :
- Scientific Reports
- Accession number :
- edsair.doi.dedup.....e9df6c3507488a55b3ba134de808ab3e