Phys.org November 30, 2024 Researchers in Italy investigated the performance of a one-dimensional dimerized chain as a spin quantum battery. Integrable model showed a rich quantum phase diagram that emerged through a mapping of the spins onto auxiliary fermionic degrees of freedom. They used a charging protocol relying on the double quench of an internal parameter, the strength of the dimerization, and addressed the energy stored in the systems. They observed three distinct regimes, depending on the timescale characterizing the duration of the charging: a short-time regime related to the dynamics of the single dimers, a long-time regime related to […]
Tag Archives: Quantum battery
New stable quantum batteries can reliably store energy into electromagnetic fields
Phys.org August 24, 2022 An international team of researchers (Italy, South Korea) revisited micromaser, a quantum mechanical system, that has been studied heavily in the past. They showed that micromasers have features that allow them to serve as excellent models of quantum batteries. However, one of the main concerns was that using electromagnetic field to store energy is that in principle, the electromagnetic field could absorb an enormous amount of energy. But their numerical results showed that this cannot happen in micromasers, the electromagnetic field reaches a steady state, and its energy can be determined and decided a priori when […]
Superabsorption unlocks key to next-generation quantum batteries
Phys.org January 17, 2022 It is theoretically possible that the charging power of quantum batteries increases faster than the size of the battery which could allow new ways to speed charging. An international team of researchers (Australia, UK, Italy) built several wafer-like microcavities of different sizes containing organic semiconductor materials that store energy. They contained different numbers of organic molecules. Each was charged using a laser. Underlying the superabsorbing effect of the quantum batteries is the idea that all the molecules act collectively through quantum superposition. As the microcavity size increased and the number of molecules increased, the charging time […]