Researchers demonstrate how quantummechanics and thermodynamics can coexist

Researchers at the University of Texas (UT) have made a significant breakthrough in reconciling quantum mechanics and thermodynamics, demonstrating that both theories can coexist simultaneously. Their findings have been published in the prestigious journal Nature Communications.

The conflict between quantum mechanics and the second law of thermodynamics has long been a paradoxical challenge. While quantum mechanics allows for the reversal of time and the preservation of information, thermodynamics implies an irreversible direction of time and the potential loss of information. The researchers, led by Jelmer Renema, have successfully addressed this dilemma using photons on an optical chip.

Renema explains that photons are advantageous in this regard as they allow for the easy reversal of time. In the experiment, the team utilized an optical chip with channels through which photons were passed. Initially, the researchers were able to precisely determine the number of photons in each channel. However, as the experiment progressed, the photons shuffled positions.

The results of the experiment support a theoretical solution to the quantum puzzle, previously explored with atoms. By demonstrating the phenomenon with photons, the UT researchers have further validated the viability of this solution. Renema emphasizes that photons offer a tangible means to manipulate time reversal.

This groundbreaking research not only contributes to our fundamental understanding of quantum mechanics and thermodynamics but also offers potential applications in various fields. Further studies and experiments in this domain are likely to shed more light on the intricate relationship between these two fundamental theories of physics.

Entanglement of subsystems

According to Dr. Jelmer Renema, an assistant professor in the Adaptive Quantum Optics research group, their study revealed intriguing insights into the interplay between thermodynamics and quantum mechanics. By examining individual channels on the optical chip, they observed the manifestation of thermodynamic laws as disorder accumulated within each channel. Interestingly, despite this apparent disorder, the overall system remained consistent with the principles of quantum mechanics.

The channels, or subsystems, exhibited a remarkable property known as entanglement. This entanglement allowed for the transfer of missing information from one subsystem to another, resulting in the apparent disappearance of information in one channel.

The research team, which also included the group led by Prof. Dr. Jens Eisert from the Freie Universit├Ąt Berlin, played a crucial role in demonstrating the reversibility of the experiment. Their collaborative efforts resulted in the publication of their groundbreaking article titled “Quantum simulation of thermodynamics in an integrated quantum photonic processor” in the esteemed journal Nature Communications.

This study represents a significant advancement in our understanding of the intricate relationship between quantum mechanics and thermodynamics. The results not only shed light on the behavior of photons in quantum systems but also provide a platform for quantum simulation of thermodynamic processes. Further exploration of these findings could pave the way for novel applications in the field of quantum technologies.

Source: University of Twente

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