We discuss a mechanism for generating a maximum entangled state (Greenberger–Horne–Zeilinger (GHZ)) in a coupled quantum dots system, based on analytical techniques. The reliable generation of such states is crucial for implementing solid-state based quantum information schemes. The signature originates from a remarkably weak field pulse or a far off-resonance effects which could be implemented using technology that is currently ... إقراء المزيد

We investigate the entanglement of a degenerate Raman process involving two degenerate Rydberg energy levels of an atom interacting with a single-mode cavity field. We use the concurrence as an entanglement measure and show that long living entanglement can be obtained for certain choices of the system parameters. إقراء المزيد

> In this letter we present a scheme for generating maximally entangled states of two cavity modes which enables us to generate complete set of Bell basis states having rather simple initial state preparation. Furthermore, we study the interaction of a two-level atom with two modes of electromagnetic field in a high Q cavity. The two-level atom acts as a ... إقراء المزيد

Engineering transient spectrum for bimodal intelligent state إقراء المزيد

Manipulating mixed-state entanglement between a time-dependent field and a three-level trapped ion إقراء المزيد

A new version of two multi-level trapped atoms interacting with laser fields is under consideration. This system is based on a three-level trapped atom interacting with laser fields in the presence of another three-level trapped atom taking into account the time-dependent atom-field couplings and phase shift. The entanglement due to the concurrence is calculated and its time evolution phenomena is ... إقراء المزيد

Entropy squeezing is examined in the framework of Shannon information entropy for a degenerate Raman process involving two degenerate Rydberg energy levels of an atom interacting with a single-mode cavity field. Quantum squeezing in entropy is exhibited via the entropic uncertainty relation. إقراء المزيد

Adopting the framework of single electrons or Cooper pairs where the rate of particle transfer is controlled by an external frequency, we investigate the dynamics of the coupled system, considering the single-mode cavity field prepared in a generalized geometric state. Considering a density matrix approach, we obtain a full description of the dynamics of the coupled system for a weak ... إقراء المزيد

Motivated by recent developments in quantum entanglement, we study the relations among concurrence and phase entropy of a three-level atom interacting with a bimodal cavity field. Analytical results are presented when the photonic band gap is exhibited by the presence of photonic crystals. The evolution of the atomic inversion with the field initially in a coherent state is examined, and ... إقراء المزيد

Engineering entanglement in a single trapped ion interacting with a laser field إقراء المزيد