21 citations · 232 across the 34 of their papers we have counts for
34 papers
Beyond the entanglement of qubit pair in a mixed state
S. Shelly Sharma, Naresh K. Sharma
Given a multipartite quantum system that consists of two-level particles (qubits), one may or may not have access to all the subsystems. What can we know about the entanglement of…
Monogamy constraints on entanglement of four-qubit pure states
S. Shelly Sharma
We report a set of monogamy constraints on one-tangle, two-tangles, three-tangles and four-way correlations of a general four-qubit pure state. It is found that given a two-qubit m…
On Monogamy of four qubit entanglement
S. Shelly Sharma, N. K. Sharma
Our main result is a monogamy inequality satisfied by the entanglement of a focus qubit (one-tangle) in a four-qubit pure state and entanglement of subsystems. Analytical relations…
Upper bound on three tangles of reduced states of four-qubit pure states
S. Shelly Sharma, N. K. Sharma
Closed formulae for upper bound on three tangles of three-qubit reduced states in terms of three-qubit invariant polynomials of pure four-qubit states are obtained. Our results off…
Sequential generation of Polynomial Invariants and N-body non-local correlations
S. Shelly Sharma, N. K. Sharma
We report an inductive process that allows for a sequential construction of polynomial invariants of state coefficients for multipartite quantum states. The starting point can be a…
Genuine Four Tangle for Four Qubit States
S. Shelly Sharma, N. K. Sharma
We report a four qubit polynomial invariant that quantifies genuine four-body correlations. The four qubit invariants are obtained from transformation properties of three qubit inv…