6533b85dfe1ef96bd12bddea
RESEARCH PRODUCT
Information-flux approach to multiple-spin dynamics
G. M. PalmaMauro PaternostroMihyang KimC. Di Francosubject
PhysicsUNIVERSALQuantum networkQuantum PhysicsQuantum dynamicsFOS: Physical sciencesQuantum channelMathematical Physics (math-ph)Atomic and Molecular Physics and OpticsCondensed Matter - Other Condensed MatterOpen quantum systemQUANTUM CLONINGQuantum processQuantum mechanicsSTATE TRANSFERStatistical physicsCHAINSQuantum informationQuantum cloningQuantum information scienceQuantum Physics (quant-ph)Mathematical PhysicsOther Condensed Matter (cond-mat.other)description
We introduce and formalize the concept of information flux in a many-body register as the influence that the dynamics of a specific element receive from any other element of the register. By quantifying the information flux in a protocol, we can design the most appropriate initial state of the system and, noticeably, the distribution of coupling strengths among the parts of the register itself. The intuitive nature of this tool and its flexibility, which allow for easily manageable numerical approaches when analytic expressions are not straightforward, are greatly useful in interacting many-body systems such as quantum spin chains. We illustrate the use of this concept in quantum cloning and quantum state transfer and we also sketch its extension to non-unitary dynamics.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-01-01 |