Mutual information and swap operation in the two-qubit Heisenberg model with Dzyaloshinskii-Moriya anisotropic antisymmetric interaction
arXiv:0808.2694 · doi:10.1088/0953-8984/19/45/456205
Abstract
Mutual information and swap operation in the two-qubit Heisenberg model with the Dzyaloshinskii-Moriya (DM) anisotropic antisymmetric interaction are investigated. It is found that the mutual information I of such a quantum channel is sensitive to the initial conditions and declines with the increase of the temperature. The DM interaction can lead to a higher mutual information, especially for the ferromagnetic case. The entanglement quality of input states cannot enhance the mutual information of the quantum channel. When the DM interaction is large, the mutual information will be the maximum value 2 for a non-entangled input state, but it is 1 for a maximally entangled input one. It is also shown that the swap operation can be implemented for some kinds of DM coupling. The conditions of the DM coupling under which the swap operation is feasible are established.
References in corpus (16)
- Quantum Computation with Quantum Dots
- Entanglement of a Pair of Quantum Bits
- A geometric theory of non-local two-qubit operations
- Information transmission through a noisy quantum channel
- Entanglement Teleportation via Werner States
- Entanglement enhanced information transmission over a quantum channel with correlated noise
- Teleportation as a Depolarizing Quantum Channel, Relative Entropy and Classical Capacity
- Thermal entanglement in a two-qubit Heisenberg XXZ spin chain under an inhomogeneous magnetic field
- Teleportation as a quantum computation
- The non-local content of quantum operations
- Teleportation via thermally entangled state of a two-qubit Heisenberg XX chain
- Entanglement teleportation via thermally entangled states of two-qubit Heisenberg XX chain
- Cancellation of Spin-Orbit Effects in Quantum Gates Based on the Exchange Coupling in Quantum Dots
- Anisotropic Spin Exchange in Pulsed Quantum Gates
- Interplay between Zeeman Coupling and Swap Action in Spin-based Quantum Computer Models: Error Correction in Inhomogeneous Magnetic Fields
- Spin swap gate in the presence of qubit inhomogeneity in a double quantum dot