3 papers
quant-ph2020
Canonical forms of two-qubit states under local operations
Sudha, H. S. Karthik, Rajarshi Pal +4
Canonical forms of two-qubits under the action of stochastic local operations and classical communications (SLOCC) offer great insight for understanding non-locality and entangleme…
quant-ph2019
Algebraic maximum violation of the Leggett-Garg inequality in a two-level system under PT symmetric dynamics
H. S. Karthik, Akshata Shenoy Hejamadi, A. R. Usha Devi
We investigate the three-term Leggett-Garg inequality (LGI) for a two-level quantum system undergoing parity-time (PT ) symmetric dynamics governed by a non-Hermitian Hamiltonian,…
quant-ph2015
Unsharp measurements and joint measurability
H. S. Karthik, A. R. Usha Devi, A. K. Rajagopal
We give an overview of joint unsharp measurements of non-commuting observables using positive operator valued measures (POVMs). We exemplify the role played by joint measurability…