13 papers
Logarithmic growth of peripheral entanglement concentrated via noisy measurements in a star network of spins
Jithin G. Krishnan, Harikrishnan K. J., Amit Kumar Pal
In a star-network of qubits interacting via Heisenberg interaction of XYZ-type, we demonstrate a logarithmic growth of the localizable bipartite peripheral entanglement with increa…
Controlling gain with loss: Bounds on localizable entanglement in multi-qubit systems
Jithin G. Krishnan, Harikrishnan K. J., Amit Kumar Pal
We investigate the relation between the amount of entanglement localized on a chosen subsystem of a multi-qubit system via local measurements on the rest of the system, and the bip…
A graph-aware bounded distance decoder for all stabilizer codes
Harikrishnan K J, Amit Kumar Pal
We formulate a bounded distance decoding strategy applicable to all stabilizer codes including both CSS and non-CSS code-families. The framework emerges out of the local Clifford e…
Scaling of entanglement entropy and correlations in the variable-range extended Ising model
Harikrishnan K J, Debasis Sadhukhan, Amit Kumar Pal
We study the two-point correlation functions and the bipartite entanglement in the ground state of the exactly-solvable variable-range extended Ising model of qubits in the presenc…
Scalable and deterministic Greenberger-Horne-Zeilinger state generation via graph states-assisted measurements
Harikrishnan K J, Amit Kumar Pal
We propose a scalable and deterministic protocol for growing large multi-qubit states starting from two-qubit non-maximally entangled pure states, where the bipartite entanglement…
Entanglement and fidelity across quantum phase transitions in locally perturbed topological codes with open boundaries
Harikrishnan K J, Amit Kumar Pal
We investigate the topological-to-non-topological quantum phase transitions (QPTs) occurring in the Kitaev code under local perturbations in the form of local magnetic field and sp…