Crystal jellyfish possess a captivating beauty, emitting a faint green glow due to a natural protein. This unique trait has allowed researchers for decades to utilise green fluorescent protein and similar substances to illuminate biological processes, enabling monitoring within cells.
Recent developments suggest these fluorescent labels could undergo a transformation, merging with quantum properties akin to those foundational to quantum computing. Peter Maurer, a quantum engineer at the University of Chicago, highlights the potential to convert these fluorescent proteins into qubits—basic units of quantum information. Although the concept seems akin to science fiction, the underlying physics has been demonstrated to function effectively.
Fluorescent protein labels currently serve as indispensable tools in biology labs worldwide, helping track protein locations and activities, assess drug targets, and perform various other functions. By infusing a quantum dimension into these tools, researchers anticipate novel applications. Quantum sensors are exceptionally sensitive, capable of detecting subtle signals from firing neurons or ion flows and identifying minute free radicals indicative of cellular stress or early cancer signs. Furthermore, these protein-based quantum sensors can be remotely activated, enhancing imaging technology and therapeutic options.
Jin Zhang, a biosensor developer at the University of California, San Diego, expresses intrigue over the new possibilities that quantum variants might unlock, particularly in improving sensitivity. The broader domain of quantum sensing for biological applications is gaining momentum, with researchers asserting that several accessible proteins and standard equipment facilitate progress.
While NV diamond sensors dominate current quantum sensing technologies, their bulkiness presents challenges in precise placement. In contrast, fluorescent proteins can be engineered at a cellular level, making them advantageous for research. Thus, the pursuit of developing quantum-capable fluorescent proteins is poised for promising advancements, with expectations of practical applications in the near future.
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