Spin-orbit enabled quantum transport channels in a two-hole double quantum dot

Bogan, Alex; Studenikin, Sergei; Korkusiński, Marek; Gaudreau, Louis; Phoenix, Jason; Zawadzki, Piotr; Sachrajda, A. S.; Tracy, Lisa A; Reno, John L.; Hargett, Terry

doi:10.1103/physrevb.103.235310

Cited by 9 publications

(7 citation statements)

References 50 publications

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“…However, for holes the large values of t F imply a strong violation of the spin selection rule. Because spin-flip tunneling is not generally blocked, the study of the excited states through tunneling spectroscopy is facilitated by the existence of additional transport channels, which are normally suppressed [117,122]. An important exception occurs when the external magnetic field ⃗ B is along the effective spin-orbit coupling field ⃗ B SO associated with the tunneling Hamiltonian [123].…”

Section: Pauli-spin Blockadementioning

confidence: 99%

Recent advances in hole-spin qubits

Fang

Philippopoulos

Culcer

et al. 2023

Mater. Quantum. Technol.

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In recent years, hole-spin qubits based on semiconductor quantum dots have advanced at a rapid pace. We first review the main potential advantages of these hole-spin qubits with respect to their electron-spin counterparts, and give a general theoretical framework describing them. The basic features of spin-orbit coupling and hyperfine interaction in the valence band are discussed, together with consequences on coherence and spin manipulation. In the second part of the article we provide a survey of experimental realizations, which spans a relatively broad spectrum of devices based on GaAs, Si, or Si/Ge heterostructures. We conclude with a brief outlook.

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Section: Pauli-spin Blockadementioning

confidence: 99%

Recent advances in hole-spin qubits

Fang

Philippopoulos

Culcer

et al. 2023

Mater. Quantum. Technol.

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“…Most systems exhibit a much smaller spin-flip contribution to tunneling compared to the spin-conserving one [58]. However, in certain cases, an applied external field can be used to tune the SOC and therefore the spin-flip contribution, for instance in GaAs-based hole QDs [59,60]. Additionally, synthetic SOC can be generated in DQDs via spin polarization in the external leads [61].…”

Section: The Total Hamiltonian Written On the Basis {|L ↑⟩ |L ↓⟩ |R ↑...mentioning

confidence: 99%

Photo-assisted spin transport in double quantum dots with spin–orbit interaction

et al. 2023

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We investigate the effect of spin-orbit interaction on the intra- and interdot particle dynamics of a double quantum dot under ac electric fields. The former is modeled as an effective ac magnetic field that produces electric-dipole spin resonance transitions, while the latter is introduced via spin-flip tunneling amplitudes. We observe the appearance of non-trivial spin-polarized dark states, arising from an ac-induced interference between photo-assisted spin-conserving and spin-flip tunneling processes. These dark states can be employed to precisely measure the spin-orbit coupling in quantum dot systems. Furthermore, we show that the interplay between photo-assisted transitions and spin-flip tunneling allows the system to operate as a highly tunable spin filter. Finally, we investigate the operation of the system as a resonant flopping-mode qubit for arbitrary ac voltage amplitudes, allowing for high tunability and enhanced qubit control possibilities.

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“…Bogan et al (contrary to the approaches discussed so far) focused on hole spins as qubits and analyzed the magnetotransport of a gated lateral GaAs double quantum dot [223]. The authors applied the density matrix formalism to simulate the tunneling current, see figure 9.…”

Section: Quantum Dots and Spin Qubitsmentioning

confidence: 99%

Computational perspective on recent advances in quantum electronics: from electron quantum optics to nanoelectronic devices and systems

Weinbub

Kosik

2022

J. Phys.: Condens. Matter

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Quantum electronics has significantly evolved over the last decades. Where initially the clear focus was on light-matter interactions, nowadays approaches based on the electron's wave nature have solidified themselves as additional focus areas. This development is largely driven by continuous advances in electron quantum optics, electron based quantum information processing, electronic materials, and nanoelectronic devices and systems. The pace of research in all of these areas is astonishing and is accompanied by substantial theoretical and experimental advancements. What is particularly exciting is the fact that the computational methods, together with broadly available large-scale computing resources, have matured to such a degree so as to be essential enabling technologies themselves. These methods allow to predict, analyze, and design not only individual physical processes but also entire devices and systems, which would otherwise be very challenging or sometimes even out of reach with conventional experimental capabilities. This review is thus a testament to the increasingly towering importance of computational methods for advancing the expanding field of quantum electronics. To that end, computational aspects of a representative selection of recent research in quantum electronics are highlighted where a major focus is on the electron's wave nature. By categorizing the research into concrete technological applications, researchers and engineers will be able to use this review as a source for inspiration regarding problem-specific computational methods.

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Spin-orbit enabled quantum transport channels in a two-hole double quantum dot

Cited by 9 publications

References 50 publications

Recent advances in hole-spin qubits

Recent advances in hole-spin qubits

Photo-assisted spin transport in double quantum dots with spin–orbit interaction

Computational perspective on recent advances in quantum electronics: from electron quantum optics to nanoelectronic devices and systems

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