Publications

Hybrid quantum computation - where one makes simultaneous use of continuous and discrete variables at the same time, is a interesting variant of standard quantum computation. In this paper, we proposed a version of hybrid quantum computers that involved a single squeezed state, together with a reservoir of completely mixed states. This is reminiscent of ... Read morePower of one qumode for quantum computation (Phys. Rev. A 93, 040304)

Resource theories of quantum coherence is a very hot topic in quantum information of late. It seeks to capture our intuition of what it means it be quantum mechanical in single systems. This work, lead by Ma Jiajun, a third year PhD student in the group, managed to to connect coherence of quantum discord - a ... Read moreConverting Coherence to Quantum Correlations (Phys. Rev. Lett. 116, 160407)

Deterministic quantum computation with one quantum bit (DQC1) has got plenty of attention due to demonstrating a rather surprising premise - a single gain bit of purity appears sufficient for a quantum computer to exhibit exponential speed over classical counterparts. In this article, we explored how these ideas map to metrology - where the goal ... Read morePower of one bit of quantum information in quantum Metrology (Physical Review A 93, 040304)

  The benefits of entanglement can outlast entanglement itself. In quantum illumination, entanglement is employed to better detect reflecting objects in environments so noisy that all entanglement is destroyed. Here, we show that quantum discord—a more resilient form of quantum correlations—explains the resilience of quantum illumination. We introduce a quantitative relation between the performance gain ... Read moreHow discord underlies the noise resilience of quantum illumination (New Journal of Physics, 18, 4)