Dissipative dynamics of a two-qubit system: Four-level lasing

Abstract

The dissipative dynamics of a two-qubit system is studied theoretically. We make use of the Bloch-Redfield formalism which explicitly includes the parameter-dependent relaxation rates. We consider the case of two flux qubits, when the controlling parameters are the partial magnetic fluxes through the qubits' loops. The strong dependence of the inter-level relaxation rates on the controlling magnetic fluxes is demonstrated for the realistic system. This allows us to propose several mechanisms for lasing in this four-level system.

7 pages, 6 figures; v2: minor changes due to referee reports

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• Broadband noise decoherence in solid-state complex architectures
• Cooling a quantum circuit via coupling to a multiqubit system

Cited by in corpus (12)

• Simultaneous Spin-Charge Relaxation in Double Quantum Dots
• Amplitude spectroscopy of two coupled qubits
• Inverse Landau-Zener-Stuckelberg problem for qubit-resonator systems
• Multiphoton transitions in Josephson-junction qubits (Review Article)
• Non-Hermitian Hamiltonian approach to the microwave transmission through one- dimensional qubit chain
• Master equation for dissipative interacting qubits in a common environment
• The Role of Multilevel Landau-Zener Interference in Extreme Harmonic Generation
• Low-frequency spectroscopy for quantum multi-level systems
• Amplitude tuning of steady state entanglement in strongly driven coupled qubits
• Dissipative dynamics in a tunable Rabi dimer with periodic harmonic driving
• Signal amplification in a qubit-resonator system
• Efficient steady state entanglement generation in strongly driven coupled qubits