Article

Journal of Low Temperature Physics

, Volume 153, Issue 5, pp 294-303

Enhancement of Sudden Death of Entanglement for Driven Qubits

  • Jian LiAffiliated withLow Temperature Laboratory, Helsinki University of Technology
  • , K. ChalapatAffiliated withLow Temperature Laboratory, Helsinki University of Technology
  • , G. S. ParaoanuAffiliated withLow Temperature Laboratory, Helsinki University of Technology Email author 

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Abstract

We study the recently discovered phenomena of sudden death of entanglement for a system of two qubits, each of them independently longitudinally damped by a reservoir and subjected to a continuous driving. We show that driving produces, in the interaction picture, an effective bath that has elements amounting to various extra sources of noise (transverse, thermal squeezed, thermal longitudinal). As a result, the time of sudden death decreases due to driving, which we verify as well by direct numerical calculation. We suggest that this phenomenon can be studied systematically using superconducting qubits driven by microwave fields.

Keywords

Entanglement Decoherence Sudden death

PACS

03.65.Ud 03.65.Yz 85.25.Cp