Quantum coherence is a fundamental aspect of quantum physics and plays a central role in quantum information science. This essential property of the quantum states could be fragile under the influence of the quantum operations. The extent to which...

A quantum protocol for secure transmission of data using

qubits is presented. This protocol sends one qubit in a

round-trip to transmit one bit of data. The protocol offers

an improvement over the BB84 QKD protocol. BB84, in...

of negativity, as a measure of quantum entanglement. In particular, the influence of different parameters of system such as detuning and mixedness of the initial atomic state on the dynamics of geometric discord has been evaluated for when the field is initially...

We use the concept of entangled graphs with weighted edges to present a classification for fourqubit entanglement which is based neither on the LOCC nor the SLOCC. Entangled graphs, first introduced

by Plesch et al. ...

, Giada, Monatunna, Sbsi1, Super Ma, and Pp8), were exposed

to ten temperature levels (0 (control), -2, -4, -6, -8, -10, -12, -14, -16 and -18oC), and

their yield of quantum efficiency (Fvs/Fms) at four levels of recovery period (2, 12, 24...

A novel quantum key distribution protocol using entanglement is presented. In this protocol, the stream of qubits is divided up into a sequence of qubit pairs. It is shown that by entangling the qubits in each qubit pair by randomly applying one...

is measured. Based on the most demolition concept in the definition of quantum discord, we study the amount of demolition when the two post-measurement states, represented as two points on the steering ellipsoid, have the most distinguishability. We use trace...

Quantum discord as a measure of the quantum correlations cannot be easily computed formost of density operators. In this paper, we present ameasure of the total quantum correlations that is operationally simple and can be computed effectively...

A discrimination problem consists of N linearly independent pure quantum states
= {|φi} and the corresponding occurrence probabilities η = {ηi}. With any such
problem, we associate, up to a permutation over the probabilities {ηi}, a unique...