3 papers
quant-ph2026
Criterion for qubit-assisted quantum metrology approaching Heisenberg scaling
Peng Chen, Jun Jing
We study in this work the metrology precision of a probe system coupled to an ancillary qubit. Restricting the probe-qubit coupling along only one or two directions is found to be…
quant-ph2025
Kerr-magnon-assisted asymptotic stationary photon-phonon squeezing
Shi-fan Qi, Jun Jing
Bosonic two-mode squeezed states are paradigmatic entangled states in continuous variable systems, which have broad applications in quantum information processing. In this work, we…
quant-ph2024
Quantum recharging by shortcut to adiabaticity
Shi-fan Qi, Jun Jing
Quantum battery concerns about population redistribution and energy dispatch over controllable quantum systems. Under unitary transformation, ergotropy rather than energy plays an…