Rabi Frequency

14,000,000 Leading Edge Experts on the ideXlab platform

Scan Science and Technology

Contact Leading Edge Experts & Companies

Scan Science and Technology

Contact Leading Edge Experts & Companies

The Experts below are selected from a list of 6327 Experts worldwide ranked by ideXlab platform

Franco Nori - One of the best experts on this subject based on the ideXlab platform.

  • controlling a nanowire spin orbit qubit via electric dipole spin resonance
    Physical Review Letters, 2013
    Co-Authors: Rui Li, Franco Nori
    Abstract:

    A semiconductor nanowire quantum dot with strong spin-orbit coupling (SOC) can be used to achieve a spin-orbit qubit. In contrast to a spin qubit, the spin-orbit qubit can respond to an external ac electric field, an effect called electric-dipole spin resonance. Here we develop a theory that can apply in the strong SOC regime. We find that there is an optimal SOC strength ${\ensuremath{\eta}}_{\mathrm{opt}}=\sqrt{2}/2$, where the Rabi Frequency induced by the ac electric field becomes maximal. Also, we show that both the level spacing and the Rabi Frequency of the spin-orbit qubit have periodic responses to the direction of the external static magnetic field. These responses can be used to determine the SOC in the nanowire.

  • cooling a magnetic resonance force microscope via the dynamical back action of nuclear spins
    Physical Review B, 2009
    Co-Authors: Ya S Greenberg, E Ilichev, Franco Nori
    Abstract:

    We analyze the back-action influence of nuclear spins on the motion of the cantilever of a magnetic force resonance microscope. We calculate the contribution of nuclear spins to the damping and Frequency shift of the cantilever. We show that, at the Rabi Frequency, the energy exchange between the cantilever and the spin system cools or heats the cantilever depending on the sign of the high-Frequency detuning. We also show that the spin noise leads to a significant damping of the cantilever motion.

Peter Stano - One of the best experts on this subject based on the ideXlab platform.

  • control of electron spin and orbital resonances in quantum dots through spin orbit interactions
    Physical Review B, 2008
    Co-Authors: Peter Stano, Jaroslav Fabian
    Abstract:

    The influence of a resonant oscillating electromagnetic field on a single electron in coupled lateral quantum dots in the presence of phonon-induced relaxation and decoherence is investigated. Using symmetry arguments, it is shown that the spin and orbital resonances can be efficiently controlled by spin-orbit interactions. The control is possible due to the strong sensitivity of the Rabi Frequency to the dot configuration (the orientation of the dot and the applied static magnetic field); the sensitivity is a result of the anisotropy of the spin-orbit interactions. The so-called easy passage configuration is shown to be particularly suitable for a magnetic manipulation of spin qubits, ensuring long spin relaxation times and protecting the spin qubits from electric field disturbances accompanying on-chip manipulations.

Jaroslav Fabian - One of the best experts on this subject based on the ideXlab platform.

  • control of electron spin and orbital resonances in quantum dots through spin orbit interactions
    Physical Review B, 2008
    Co-Authors: Peter Stano, Jaroslav Fabian
    Abstract:

    The influence of a resonant oscillating electromagnetic field on a single electron in coupled lateral quantum dots in the presence of phonon-induced relaxation and decoherence is investigated. Using symmetry arguments, it is shown that the spin and orbital resonances can be efficiently controlled by spin-orbit interactions. The control is possible due to the strong sensitivity of the Rabi Frequency to the dot configuration (the orientation of the dot and the applied static magnetic field); the sensitivity is a result of the anisotropy of the spin-orbit interactions. The so-called easy passage configuration is shown to be particularly suitable for a magnetic manipulation of spin qubits, ensuring long spin relaxation times and protecting the spin qubits from electric field disturbances accompanying on-chip manipulations.

Clive Emary - One of the best experts on this subject based on the ideXlab platform.

  • spin orbit driven coherent oscillations in a few electron quantum dot
    Physical Review Letters, 2005
    Co-Authors: S Debald, Clive Emary
    Abstract:

    We propose an experiment to observe coherent oscillations in a single quantum dot with the oscillations driven by spin-orbit interaction. This is achieved without spin-polarized leads, and relies on changing the strength of the spin-orbit coupling via an applied gate pulse. We derive an effective model of this system which is formally equivalent to the Jaynes-Cummings model of quantum optics. For parameters relevant to an InGaAs dot, we calculate a Rabi Frequency of 2 GHz.

Le Thi Ngoc Bao - One of the best experts on this subject based on the ideXlab platform.

  • quantum beat of excitons in spherical semiconductor quantum dots
    Superlattices and Microstructures, 2020
    Co-Authors: Dinh Nhu Thao, Le Thi Ngoc Bao
    Abstract:

    Abstract This article reports a study on quantum beat of excitons in spherical semiconductor quantum dots. With renormalized wavefunction formulation for a three-level model including ground state level and two excited ones of exciton, quantum beat of excitons is observed to be twice the electron Rabi Frequency while a strong resonant pump laser is connecting two exciton excited levels. In addition, dependences of characteristics of quantum beat of excitons on dot radius and pump laser detuning are examined.