High-performance Kerr quantum battery

Muhammad Shoufie Ukhtary, Ahmad R.T. Nugraha, Adam B. Cahaya, Andrivo Rusydi, Muhammad Aziz Majidi

Research output: Contribution to journalArticlepeer-review


We propose and investigate the performance of a hybrid quantum battery, the so-called Kerr quantum battery, which consists of two interacting quantum oscillators, i.e., the charger is a harmonic oscillator and the battery is an anharmonic oscillator involving the Kerr nonlinearity. Such a setup creates nonuniform spacing between energy levels of the quantum oscillator that increases with the energy level. We find that the Kerr quantum battery can store more energy than the qubit battery and reaches maximum stored energy faster than the harmonic oscillator battery. In particular, the average charging power of the Kerr quantum battery is larger than the qubit battery. Furthermore, most of the stored energy in the Kerr quantum battery can be extracted for work. All of the properties of the Kerr quantum battery are controlled by the strength of nonlinearity, in which the enhancement of the nonlinearity transforms the battery from a harmonic oscillator to a qubit.

Original languageEnglish
Article number034001
JournalApplied Physics Letters
Issue number3
Publication statusPublished - 17 Jul 2023


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