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Bananas in containers

11.06.2000

One of the German shipbuilding companies handed over to the customer - the American company "Dole" two of the world's largest container ships for the transport of bananas from Costa Rica.

Each of the 205-metre-long ships carries thirty thousand tons of bananas loaded into a thousand containers (twice as many as the largest banana carriers in existence). The ship's speed is 21 knots (about 40 kilometers per hour). On the way, bananas are cooled, and the total capacity of refrigerators is about 15 megawatts.

The banana car is supplied with electricity from five diesel generators.

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Quantum effects for fast battery charging 01.06.2017

An international team of scientists has made theoretical studies, the results of which have shown that a matrix consisting of nano-sized rechargeable batteries can be charged much faster than each such battery individually. This phenomenon is the result of the so-called collective quantum interactions, which form the basis of a relatively new field - quantum thermodynamics. This area deals with the study of how quantum effects affect the laws of traditional physics that determine such fundamental quantities as energy, work, etc.

The vast majority of studies related to the practical use of the phenomena of quantum mechanics are aimed at the transfer of quantum information and its processing in the depths of the developed quantum computing systems. And only in isolated cases are studies demonstrating the advantages of using quantum effects in other areas, in particular, in thermodynamics. Only recently has it been shown how the phenomenon of quantum entanglement can allow more work to be done using energy drawn from a single nanoscale device, a kind of "quantum battery".

In new research, scientists have shown that quantum phenomena not only allow more efficient use of energy, they can also increase the capacity and shorten the charge time of the aforementioned quantum batteries. Moreover, this process does not require the presence of quantum entanglement, although this requires a number of conditions required to create quantum entanglement.

"We have demonstrated that it is quite possible to organize a quantum interaction between two or large bodies without involving quantum entanglement in this phenomenon," write the researchers from Monash University, Australia. all of these are bodies, quantum nanosized batteries in this case."

The quantum advantage provided by interactions also has its limits, which determine the minimum possible time for charging batteries due to quantum effects. The main limiting factor is the factor of quantum speed, the maximum speed of quantum processes, which determines both the limits of quantum thermodynamic processes and the speed of future quantum computers.

"Quantum bits, the qubits of quantum computers that are ions or atoms, can also be thought of as tiny quantum batteries to which our research can be applied," the researchers write. quantum advantage in systems with a finite number of bodies involved wherever possible.This, in turn, could lead to a whole range of fantastic technologies, ranging from tiny batteries comparable in capacity to large batteries, nanomachines capable of performing large amount of work and much more.

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