Project Q-Xtreme is guided by a critical question: do the principles of quantum physics apply to macroscopic objects irrespective of their size? Addressing this issue holds theoretical interest and potential practical benefits. By delving into the fundamentals of quantum physics, we aim to broaden our knowledge of the physical world and advance technologies across several disciplines. The primary objective of Q-Xtreme is to experimentally prepare and control a levitated object in a quantum superposition, where it behaves as if it were in two places at once. This extends previous tests of the quantum superposition principle to unprecedented macroscopic scales.
Historically, macroscopic quantum superpositions have been confirmed for objects as large as organic molecules, which contain thousands of atoms. With Q-Xtreme, our goal is to extend these verifications to objects comprising billions of atoms, exceeding current benchmarks by at least five orders of magnitude in mass. The approach involves quantum control of the center-of-mass motion of a levitated nanoparticle in ultra-high vacuum using a combination of optical, electrical, and magnetic forces. The execution of these ambitious goals is made possible by our synergy team, which combines leading expertise in photonics, nanotechnology, optoelectronics, and quantum technology.
The implications of the project are broad, offering potential insights into the relationship between quantum physics and gravity, and contributing to our understanding of dark matter and dark energy models. The practical applications that could arise from achieving macroscopic quantum superpositions are also noteworthy, such as improved inertial force sensing, measurements of short-range interactions, and gravitational physics.
