Friday 31 January 2025
Physicists have made a significant breakthrough in creating high-fidelity multipartite entangled states in non-Hermitian qubits, paving the way for more efficient and powerful quantum computing systems.
The researchers used a novel approach by exploiting the exceptional points of non-Hermitian Hamiltonians to generate GHZ states in three and four qubits. These states are critical components in many quantum algorithms and simulations, but their creation is often challenging due to the fragile nature of entanglement.
In this study, the team demonstrated that strong driving fields or strong couplings among the qubits can be used to create GHZ states with high fidelity. The results show that the non-Hermitian system can generate these states with a fidelity approaching unity when the decay rates are relatively low.
The researchers also found that the system’s robustness against dissipation is enhanced by increasing the driving field or coupling strength, allowing for more stable entanglement generation. This is particularly significant in quantum computing applications where errors and decoherence are major hurdles to overcome.
One of the key advantages of this approach is its ability to reduce the time and complexity required to generate large-scale entangled states. By using strong driving fields or couplings, the system can create GHZ states in a single step, eliminating the need for sequential entangling gates.
The findings have significant implications for the development of more powerful quantum computing systems. The ability to create high-fidelity multipartite entangled states will enable researchers to explore new applications and simulations that were previously inaccessible.
In addition, the study highlights the potential of non-Hermitian systems in quantum information processing and quantum computation. These systems offer a unique set of properties that can be exploited to create more efficient and robust quantum computing architectures.
The next step for the researchers is to experimentally verify their findings using existing quantum computing technologies. If successful, this could lead to the development of more powerful and scalable quantum computers capable of tackling complex problems in fields such as chemistry, materials science, and cryptography.
Cite this article: “Creating High-Fidelity Multipartite Entangled States in Non-Hermitian Qubits”, The Science Archive, 2025.
Quantum Computing, Non-Hermitian Qubits, Entangled States, Ghz States, Quantum Algorithms, Simulations, Strong Driving Fields, Couplings, Dissipation, Robustness.
