Quantum mahy-body systems have been identified as ideal candidates for carrying out quantum tasks. On one hand, a number of quantum many-body systems have been employed for several aspects of quantum information processing and quantum computation, eg. one-dimensional quantum spin models for quantum state transfer, topological quantum codes for quantum error correction, etc. On the other hand, it has become evident that a quantum information theoretic POV may lead to further insight into quantum many-body systems. This cross-talk continues to drive advances in both fields. Our research brings together interesting aspects of both worlds. We focus on exploring the emergent quantum phenomena using the lense of information, and on developing task-specific quantum protocols using few-body quantum systems.

Quantum measurement has been used by a number of quantum algorithms for a variety of tasks over the past two decades. Arguably, the most famous of the measurement-assisted quantum protocols is measurement-based quantum computation. Our research leads to performing physical operations, such as cooling a resonator as well as a single or a number of qubits, charging a quantum battery, etc. via appropriate measurement-driven protocols. We also design measurement-assisted quantum error correction / mitigation protocols for errors that takes a system out of its ground state subspace, which is used to perform specific quantum tasks. 

Quantum metrology and sensing have witnessed rapid advances in the last few years. On one hand, design and fabrication of precise quantum sensors allowing highly sensitive detection of gravitational, magnetic, and electric fields have been achieved. On the other hand, proposals of harnessing quantum resources in the form of superposition, entanglement and squeezing to surpass the classical limit of sensing as well as to detect extremely weak signals corresponding to the gravitational wave and dark matter have been put forward. In the group, we explore how the quantum parameter estimation and sensing protocols can be modified in order to accommodate noisy environment and natural disorder present in quantum devices.