95 citations · 112 across the 6 of their papers we have counts for
6 papers
Maximizing genuine multipartite entanglement of N mixed qubits
S. Agarwal, S. M. Hashemi Rafsanjani
Beyond the simplest case of bipartite qubits, the composite Hilbert space of multipartite systems is largely unexplored. In order to explore such systems, it is important to derive…
Witnessing non-classicality of a quantum oscillator state by coupling it to a qubit
S. Agarwal, J. H. Eberly
We propose a new witness operation for the non-classical character of a harmonic oscillator state. The method does not require state reconstruction. For all harmonic oscillator sta…
X-matrices provide a lower bound of concurrence
S. M. Hashemi rafsanjani, S. Agarwal
By focusing on the X-matrix part of a density matrix of two qubits we provide an algebraic lower bound for the concurrence. The lower bound is generalized for cases beyond two qubi…
Tavis-Cummings model beyond the rotating wave approximation: Quasi-degenerate qubits
S. Agarwal, S. M. Hashemi Rafsanjani, J. H. Eberly
The Tavis-Cummings model for more than one qubit interacting with a common oscillator mode is extended beyond the rotating wave approximation (RWA). We explore the parameter regime…
Two Qubits Tavis-Cummings Model Beyond the Rotating Wave Approximation: Degenerate Regime
S. Agarwal, S. M. Hashemi Rafsanjani, J. H. Eberly
We study the dynamics of two qubits interacting with a single mode of a harmonic oscillator beyond the rotating wave approximation in the ideally degenerate regime. Exact analytic…
Exact Entanglement Dynamics Beyond the Rotating Wave Approximation
S. M. Hashemi Rafsanjani, S. Agarwal, J. H. Eberly
The entanglement dynamics of two remote qubits is examined analytically. The qubits interact arbitrarily strongly with separate harmonic oscillators in the idealized degenerate lim…