Abstract
The natural thermal entanglement in an Ising ring in an external magnetic field was studied. The interactions of two qubits via the Ising interaction in a magnetic field orthogonal to the z direction was analyzed. A theorem for the concurrence mixing due to occupation of the ground and the excited state was formulated. The variation of entanglement with the orientation of magnetic field was numerically considered.
| Original language | English |
|---|---|
| Article number | 042302 |
| Number of pages | 7 |
| Journal | Physical Review A |
| Volume | 64 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 6 Sep 2001 |
Keywords
- Hamiltonians
- magnetic field effects
- mathematical models
- matrix algebra
- phase transitions
- theorem proving
- thermal effects
- thermoanalysis
- quantum Ising model
- thermal concurrence mixing
- thermal entanglement
- quantum theory