In the never-ending arms race between secret-keepers and code-breakers, the laws of quantum mechanics seemed to have the potential to give secret-keepers the upper hand. A technique called quantum ...

Principled ion: a minimum amount of energy is required to erase a quantum bit. (Courtesy: iStock/thelightwriter) The minimum amount energy needed to erase a quantum bit (qubit) of information has been ...

In the early 1920s, physicists were first working out the mysteries of the quantum Universe. Particles sometimes behaved as waves, with indeterminate positions, momenta, energies, and other properties ...

As we celebrate 2025—the International Year of Quantum (IYQ)—we embark on a journey through the eight guiding principles that have shaped a century of quantum discovery. This series begins with ...

In quantum mechanics, the Heisenberg uncertainty principle dictates that the position and speed of an object cannot both be known fully precisely at the same time. Researchers now show that two ...

Landauer's principle is a thermodynamics concept also relevant in information theory, which states that erasing one bit of information from an information system results in the dissipation of at least ...

Quantum physics is the science of the very small. But physicists are making it bigger, setting records for the size and energies of objects they can get to exhibit quantum effects. Now physicists at ...

Do you feel nervous when you make a credit-card transaction using your mobile phone? Your worries could soon be a thing of the past, thanks to a low-cost device that could bring powerful cryptography ...