So Paulo State University researchers have developed a new approach to measuring quantum entanglement, which is expected to revolutionize quantum computing by proving that it is a critical factor in processing power and could bring about improvements in its design.
In quantum physics, entanglement occurs when two or more systems become interconnected, making it impossible to describe their quantum states separately. When systems interact and become entangled, they exhibit strong correlations. This concept is significant for quantum computing, as the degree of entanglement directly impacts the quantum computer's efficiency and optimization.
Researchers from So Paulo State University's Institute of Geosciences and Exact Sciences (IGCE-UNESP) in Rio Claro, Brazil, conducted a study to explore a new method for measuring entanglement and identify optimal conditions for its maximum utilization. These applications encompass the creation of a high-quality quantum computer.
The study's Letter in Physical Review B is the published article.
The investigation demonstrated how the Hellmann-Feynman theorem can be broken under specific conditions. The theorem is an integral of quantum mechanics and is applicable to various fields, including quantum chemistry and particle physics.
Our proposal, as explained by Valdeci Mariano de Souza, a professor at IGCE-UNESP, involves applying a quantum analog of the Grüneisen parameter to investigate quantum critical points and a magnetic field or a specific level of pressure. It emphasizes that this maximizes entanglement around quantum critical points and breaks the Hellmann-Feynman theorem.
Souza believes that the findings aid in fundamental physics research and may have a significant impact on quantum computing. He reminisces about Gordon Moore's prediction in 1965 that conventional computers would double their transistor count every two years. He contrasts this with the current pace of technological advancements in quantum computing, which is leading the way in the field.
The paper explains that quantum entanglement is a new area of research, which is fueled by the need to expand our knowledge on the subject.
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Souza brought together a number of collaborators, including Antonio Seridonio (UNESP Ilha Solteira), Roberto Lagos-Monaco (UNESP Rio Claro), Luciano Ricco (University of Iceland), and Aniekan Magnus Ukpong (University of KwaZulu-Natal, South Africa), to work on the study. He also designed it and made significant contributions, while Lucas Squillante, his postdoctoral researcher, made important contributions.
The article was created through funding from FAPESP, which was granted for research in projects 11/22050-4 and 18/09413-0.