Accelerated and robust population transfer in a transmon qutrit via $$\Delta $$Δ-type driving
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DOI: 10.1007/s11128-018-2006-7
Abstract: We propose an efficient protocol to implement accelerated and robust population transfer in a transmon qutrit via $$\Delta $$Δ-type driving. By means of stimulated Raman adiabatic passage, we first show an adiabatic population transfer in… read more here.
Keywords: transfer transmon; population transfer; qutrit; population ... See more keywords
Optimal controls of invariant-based population transfer in a superconducting qutrit
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DOI: 10.1007/s11128-020-2583-0
Abstract: Optimization of the control operations is of critical importance in the context of quantum information processing. We adopt optimal control techniques to implement invariant-based quantum population transfer in a superconducting qutrit. The first three levels… read more here.
Keywords: transfer superconducting; population transfer; qutrit; transfer ... See more keywords
Speeding up maximum population transfer in periodically driven multi-level quantum systems
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DOI: 10.1038/s41598-019-52595-7
Abstract: A fast and robust approach to controlling the quantum state of a multi-level quantum system is investigated using a twofrequency time-varying potential. A comparison with other related approaches in the context of a two-level system… read more here.
Keywords: level quantum; multi level; population transfer; speeding maximum ... See more keywords
Dissipation and dynamics in ultrafast intersystem crossings.
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DOI: 10.1063/1.5125005
Abstract: The effects of dynamics and dissipation on ultrafast intersystem crossings are studied for a dissipative two-level system coupled to a local vibronic mode. A method of amplitude damping of the wave packet is presented that… read more here.
Keywords: ultrafast intersystem; wave packet; population transfer;
Reinforcement learning-enhanced protocols for coherent population-transfer in three-level quantum systems
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DOI: 10.1088/1367-2630/ac2393
Abstract: We deploy a combination of reinforcement learning-based approaches and more traditional optimization techniques to identify optimal protocols for population transfer in a multi-level system. We constrain our strategy to the case of fixed coupling rates… read more here.
Keywords: level; reinforcement learning; population transfer; learning enhanced ... See more keywords
Composite pulses for high fidelity population transfer in three-level systems
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DOI: 10.1088/1367-2630/ac48e7
Abstract: In this work, we propose a composite pulses (CPs) scheme by modulating phases to achieve high fidelity population transfer in three-level systems. To circumvent the obstacle that not enough variables are exploited to eliminate the… read more here.
Keywords: fidelity; high fidelity; state; population ... See more keywords
Population transfer at exceptional points in the spectra of the hydrogen atom in parallel electric and magnetic fields
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DOI: 10.1103/physreva.98.013417
Abstract: We study the population transfer between resonance states for a time-dependent loop around exceptional points in spectra of the hydrogen atom in parallel electric and magnetic fields. Exceptional points are well-suited for population transfer mechanisms,… read more here.
Keywords: exceptional points; hydrogen atom; population transfer; points spectra ... See more keywords