Spin-valley qubit in nanostructures of monolayer semiconductors: Optical control and hyperfine interaction
arXiv:1601.07268 · doi:10.1103/PhysRevB.93.045313
Abstract
We investigate the optical control possibilities of spin-valley qubit carried by single electrons localized in nanostructures of monolayer TMDs, including small quantum dots formed by lateral heterojunction and charged impurities. The quantum controls are discussed when the confinement induces valley hybridization and when the valley hybridization is absent. We show that the bulk valley and spin optical selection rules can be inherited in different forms in the two scenarios, both of which allow the definition of spin-valley qubit with desired optical controllability. We also investigate nuclear spin induced decoherence and quantum control of electron-nuclear spin entanglement via intervalley terms of the hyperfine interaction. Optically controlled two-qubit operations in a single quantum dot are discussed.
arXiv comment17pages, 10 figures
References in corpus (28)
- Atomically thin MoS2: A new direct-gap semiconductor
- Quantum Computation with Quantum Dots
- Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
- Control of valley polarization in monolayer MoS2 by optical helicity
- Valley polarization in MoS2 monolayers by optical pumping
- MoS_2 as an ideal material for valleytronics: valley-selective circular dichroism and valley Hall effect
- Optical Generation of Excitonic Valley Coherence in Monolayer WSe2
- Valley Dependent Optoelectronics from Inversion Symmetry Breaking
- Spin qubits in graphene quantum dots
- Three-band tight-binding model for monolayers of group-VIB transition metal dichalcogenides
- Electron spin relaxation by nuclei in semiconductor quantum dots
- Electron spin decoherence in quantum dots due to interaction with nuclei
- Electronic structures and theoretical modelling of two-dimensional group-VIB transition metal dichalcogenides
- Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics
- Magnetoelectric effects and valley controlled spin quantum gates in transition metal dichalcogenide bilayers
- Spin-Layer Locking Effects in Optical Orientation of Exciton Spin in Bilayer WSe2
- Stability and dopability of native defects and group-V and -VII impurities in single-layer MoS2
- Spin-orbit coupling, quantum dots, and qubits in monolayer transition metal dichalcogenides
- Theory of electron spin decoherence by interacting nuclear spins in a quantum dot
- Spin decoherence of a heavy hole coupled to nuclear spins in a quantum dot
- Theory of Quantum Optical Control of Single Spin in a Quantum Dot
- Optical RKKY Interaction between Charged Semiconductor Quantum Dots
- Hole - Nuclear Spin Interaction in Quantum Dots
- Quantum theory of spectral diffusion induced electron spin decoherence
- Quantum computing by optical control of electron spins
- Intervalley coupling by quantum dot confinement potentials in monolayer transition metal dichalcogenides
- Relaxation of Shallow Donor Electron Spin due to Interaction with Nuclear Spin Bath
- Entanglement and errors in the control of spins by optical coupling
Cited by in corpus (31)
- Discrete quantum dot like emitters in monolayer MoSe2: Spatial mapping, Magneto-optics and Charge tuning
- Valley Polarization in Size-Tunable Monolayer Semiconductor Quantum Dots
- Coupling emission from single localized defects in 2D semiconductor to surface plasmon polaritons
- Optical control of a single spin-valley in charged WSe quantum dots
- Dielectrics for Two-Dimensional Transition Metal Dichalcogenide Applications
- Valley qubit in gated MoS monolayer quantum dot
- Magnetooptics of layered two-dimensional semiconductors and heterostructures: progress and prospects
- Impurity-assisted electric control of spin-valley qubits in monolayer MoS
- Strong Rashba effect in the localized impurity states of halogen-doped monolayer PtSe2
- Control of valley dynamics in silicon quantum dots in the presence of an interface step
- First-principles hyperfine tensors for electrons and holes in GaAs and silicon
- Strain-induced bound states in transition-metal dichalcogenide bubbles
- Optical identification using imperfections in 2D materials
- Gate-defined, Accumulation-mode Quantum Dots in Monolayer and Bilayer WSe
- Spin-valley system in a gated MoS-monolayer quantum dot
- Spin-Degenerate Regimes for Single Quantum Dots in Transition Metal Dichalcogenide Monolayers
- Valley two-qubit system in a MoS-monolayer gated double quantum dot
- The effect of valley, spin and band nesting on the electronic properties of gated quantum dots in a single layer of transition metal dichalcogenides (TMDCs)
- Wigner Crystals in Two-Dimensional Transition-Metal Dichalcogenides: Spin Physics and Readout
- Interplay of valley polarization and dynamic nuclear polarization in 2D transition metal dichalcogenides
- Band-offset-induced lateral shift of valley electrons in ferromagnetic MoS/WS planar heterojunctions
- Optical Resonance Shift Spin Noise Spectroscopy
- Quantum state transfer between valley and photon qubits
- Hydrogenic Spin-Valley states of the Bromine donor in 2H-MoTe
- Ultrafast Carrier Dynamics in Two-Dimensional Electron Gas-Like K-doped MoS2
- Valley-dependent transport through graphene quantum dots due to proximity-induced, staggered spin-orbit couplings
- Theory of field-modulated spin-valley-orbital pseudospin physics
- Valley Emission and Upconversion in Isotopically Engineered Monolayer WS under Resonant Excitation
- Wannier Excitons Confined in Hexagonal Boron Nitride Triangular Quantum Dots
- Hyperfine Interaction in a MoS Quantum Dot: Decoherence of a Spin-Valley Qubit
- Hyperfine interaction in atomically thin transition metal dichalcogenides