LZSM spectroscopy extracts a charge noise spectral density of 0.5-0.9 neV/√Hz in bilayer graphene quantum dots, with temperature and frequency dependence indicating dominance of thermal Johnson noise or electron-phonon coupling over two-level fluctuators.
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Self-consistent 6×6 k·p SP + CI simulations of a triangular Si FinFET DQD yield gate-tunable exchange J and magnetic orientations that favor high-fidelity SWAP or CZ operations.
A spin-triplet encoding based on valley-singlet states makes shuttling fidelities in Si/SiGe quantum wells higher and more robust to small valley splittings by suppressing Landau-Zener excitations.
Spin Kerr-cat qubits encode information in the lowest levels of a Z2-symmetric nuclear-spin Hamiltonian in quadrupolar nuclei to achieve first-order dephasing suppression, yielding estimated T2* of 100 s for 123Sb in silicon and 99% two-qubit gate fidelity with quadrupolar enhancement.
Continuous driving in chiral quantum networks allows transient concurrence to exceed the undriven 2/e benchmark because nonsecular terms mix dressed-state coherences under strong driving.
Direct visualization of the one- and two-electron energy level structure in silicon double quantum dots, including the transition from isolated atomic levels to molecular bonding states and valley-Zeeman splitting.
Intermediate tunnel couplings in donor flip-flop qubits enable simultaneous strong spin-photon coupling and high-fidelity readout.
Twisted trilayer hBN exhibits electric-field-tunable super moiré domains that host reconfigurable arrays of quantum dots supporting localized quantum harmonic oscillator states.
SAGE qubits gain magnetic protection from singlet-only encoding and always-on exchange but need refocusing pulses and ramp control to maintain coherence and gate performance against charge noise.
Theoretical study of flopping-mode qubits in Si/SiGe showing that high-fidelity operation is achievable across valley configurations when pulses are tuned for weak noise or when valley splittings are large and phase differences small for strong noise.
Magnetic domain walls are positioned as a platform for scalable quantum computation architectures leveraging their quantum effects and mobility.
citing papers explorer
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Probing charge noise in bilayer graphene quantum dots by Landau-Zener-St\"uckelberg-Majorana spectroscopy
LZSM spectroscopy extracts a charge noise spectral density of 0.5-0.9 neV/√Hz in bilayer graphene quantum dots, with temperature and frequency dependence indicating dominance of thermal Johnson noise or electron-phonon coupling over two-level fluctuators.
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Simulation of exchange coupling effects in double quantum dot FinFET-like structures
Self-consistent 6×6 k·p SP + CI simulations of a triangular Si FinFET DQD yield gate-tunable exchange J and magnetic orientations that favor high-fidelity SWAP or CZ operations.
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Using a spin-triplet encoding to enhance shuttling fidelities in Si/SiGe quantum wells
A spin-triplet encoding based on valley-singlet states makes shuttling fidelities in Si/SiGe quantum wells higher and more robust to small valley splittings by suppressing Landau-Zener excitations.
-
Spin Kerr-cat qubits
Spin Kerr-cat qubits encode information in the lowest levels of a Z2-symmetric nuclear-spin Hamiltonian in quadrupolar nuclei to achieve first-order dephasing suppression, yielding estimated T2* of 100 s for 123Sb in silicon and 99% two-qubit gate fidelity with quadrupolar enhancement.
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Transient entanglement generation in driven chiral networks beyond the secular approximation
Continuous driving in chiral quantum networks allows transient concurrence to exceed the undriven 2/e benchmark because nonsecular terms mix dressed-state coherences under strong driving.
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Directly visualizing the energy level structure of quantum dot molecules
Direct visualization of the one- and two-electron energy level structure in silicon double quantum dots, including the transition from isolated atomic levels to molecular bonding states and valley-Zeeman splitting.
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Simultaneous High-Fidelity Readout and Strong Coupling for a Donor-Based Spin Qubit
Intermediate tunnel couplings in donor flip-flop qubits enable simultaneous strong spin-photon coupling and high-fidelity readout.
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Super Moir\'e Domain Tessellations, Sliding Ferroelectricity, and Reconfigurable Quantum Dot Arrays in Twisted Trilayer Hexagonal Boron Nitride
Twisted trilayer hBN exhibits electric-field-tunable super moiré domains that host reconfigurable arrays of quantum dots supporting localized quantum harmonic oscillator states.
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Singlet-only always-on gapless exchange (SAGE) spin qubits: Charge noise effects and two-qubit gates
SAGE qubits gain magnetic protection from singlet-only encoding and always-on exchange but need refocusing pulses and ramp control to maintain coherence and gate performance against charge noise.
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The effects of alloy disorder on strongly-driven flopping mode qubits in Si/SiGe
Theoretical study of flopping-mode qubits in Si/SiGe showing that high-fidelity operation is achievable across valley configurations when pulses are tuned for weak noise or when valley splittings are large and phase differences small for strong noise.
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Perspective: Quantum Computing on Magnetic Racetrack
Magnetic domain walls are positioned as a platform for scalable quantum computation architectures leveraging their quantum effects and mobility.