Strong spin-photon coupling in silicon

Samkharadze, Nodar; Zheng, Guoji; Kalhor, Nima; Brousse, Delphine; Sammak, Amir; Mendes, Udenys Cabral; Blais, Alexandre; Scappucci, Giordano; Vandersypen, L. M. K.

doi:10.1126/science.aar4054

Cited by 343 publications

(384 citation statements)

References 38 publications

(66 reference statements)

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“…However, scaling up to large quantum circuits in architecture based on QDs will require mastering of long-distance quantum communication between registers of a few qubits [9][10][11][12]. While applying multiple SWAP gates [13][14][15] to subsequent spin qubits in a chain of quantum dots is the most conceptually straightforward proposal, the two most recently successful avenues for achieving this goal are either coherently coupling stationary spin qubits to flying qubits, specifically to microwave photons [16][17][18], or simply making electron spin qubits mobile in a controlled way. The latter can be achieved in polar materials such as GaAs with surface acoustic waves [19][20][21] making a single electron travel for up to 100 µm [20] distance, or by gate voltage controlled transfer of an electron along a chain of quantum dots.…”

Section: Introductionmentioning

confidence: 99%

Adiabatic electron charge transfer between two quantum dots in presence of 1/f noise

Krzywda

Cywiński

2020

Phys. Rev. B

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Controlled adiabatic transfer of a single electron through a chain of quantum dots has been recently achieved in GaAs and Si/SiGe based quantum dots, opening prospects for turning stationary spin qubits into mobile ones, and solving in this way the problem of long-distance communication between quantum registers in a scalable quantum computing architecture based on quantum dots. We consider theoretically the process of such an electron transfer between two tunnel-coupled quantum dots, focusing on control by slowly varying the detuning of energy levels in the dots. We take into account the fluctuations in detuning caused by 1/f -type noise that is ubiquitous in semiconductor nanostructures, and analyze their influence on probability of successful transfer of an electron in a spin eigenstate. With numerical and analytical calculations we show that probability of electron not being transferred due to 1/f β noise in detuning is ∝ σ 2 t β−1 /v, where σ characterizes the noise amplitude, t is the interdot tunnel coupling, and v is the detuning sweep rate. Interestingly, this means that the noise-induced errors in charge transfer are independent of t for 1/f noise. For realistic parameters taken from experiments on silicon-based quantum dots, we obtain the minimal probability of charge transfer failure between a pair of dots is limited by 1/f noise in detuning to be the on order of 0.01. This means that in order to reliably transfer charges across many quantum dots, charge noise in the devices should be further suppressed, or tunnel couplings should be increased, in order to allow for faster transfer (and less exposure to noise), while not triggering the deterministic Landau-Zener excitation. arXiv:1909.11780v2 [cond-mat.mes-hall]

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Section: Introductionmentioning

confidence: 99%

Adiabatic electron charge transfer between two quantum dots in presence of 1/f noise

Krzywda

Cywiński

2020

Phys. Rev. B

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“…Furthermore, the formation of hybrid excitations, such as magnon-polarons [11][12][13][14][15][16][17][18] and magnonpolaritons [19][20][21][22][23][24], requires the dissipation to be weak with respect to the coupling strengths between the two participating excitations [25]. Therefore, in several physical phenomena that have emerged into focus in the recent years [12,16,[26][27][28][29][30], damping not only determines the system response but also the very nature of the eigenmodes themselves. Understanding, exploiting and controlling the damping in magnets is thus a foundational pillar of the field.…”

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confidence: 99%

Magnon decay theory of Gilbert damping in metallic antiferromagnets

et al. 2020

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Gilbert damping is a key property governing magnetization dynamics in ordered magnets. We present a theoretical study of intrinsic Gilbert damping induced by magnon decay in antiferromagnetic metals through s-d exchange interaction. Our theory delineates the qualitative features of damping in metallic antiferromagnets owing to their bipartite nature, in addition to providing analytic expressions for the damping parameters. Magnoninduced intraband electron scattering is found to predominantly cause magnetization damping, whereas the Néel field is found to be damped via disorder. Depending on the conduction electron band structure, we predict that magnon-induced interband electron scattering around band crossings may be exploited to engineer a strong Néel field damping. arXiv:1907.01045v1 [cond-mat.mes-hall] 1 Jul 2019

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“…Superconducting co-planar microwave resonators allow for a variety of compact designs in conjunction with high quality factors, and find applications in the sensitive readout of individual quantum systems and small ensembles [1][2][3][4][5][6][7] and the coupling of distinct physical systems 2,8,9 . Superconducting resonators inductively coupled to atomic impurity spins form the basis of proposals for spin-based quantum memories [10][11][12][13][14] and have led to substantial advances in the detection limit of electron spin resonance [5][6][7] .…”

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confidence: 99%

Tuning high-Q superconducting resonators by magnetic field reorientation

et al. 2019

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Superconducting resonators interfaced with paramagnetic spin ensembles are used to increase the sensitivity of electron spin resonance experiments and are key elements of microwave quantum memories. Certain spin systems that are promising for such quantum memories possess 'sweet spots' at particular combinations of magnetic fields and frequencies, where spin coherence times or linewidths become particularly favorable. In order to be able to couple high-Q superconducting resonators to such specific spin transitions, it is necessary to be able to tune the resonator frequency under a constant magnetic field amplitude. Here, we demonstrate a high quality, magnetic field resilient superconducting resonator, using a 3D vector magnet to continuously tune its resonance frequency by adjusting the orientation of the magnetic field. The resonator maintains a quality factor of > 10 5 up to magnetic fields of 2.6 T, applied predominantly in the plane of the superconductor. We achieve a continuous tuning of up to 30 MHz by rotating the magnetic field vector, introducing a component of 5 mT perpendicular to the superconductor.

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Strong spin-photon coupling in silicon

Cited by 343 publications

References 38 publications

Adiabatic electron charge transfer between two quantum dots in presence of 1/f noise

Adiabatic electron charge transfer between two quantum dots in presence of 1/f noise

Magnon decay theory of Gilbert damping in metallic antiferromagnets

Tuning high-Q superconducting resonators by magnetic field reorientation

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