Polarimetry With Spins in the Solid State
arXiv:2410.17867 · doi:10.1021/acs.nanolett.5c01511
Abstract
The ability for optically active media to rotate the polarization of light is the basis of polarimetry, an illustrious technique responsible for many breakthroughs in fields as varied as astronomy, medicine and material science. Here, we recast the primary mechanism for spin readout in semiconductor-based quantum computers, Pauli spin-blockade (PSB), as the natural extension of polarimetry to the third dimension. We perform polarimetry with spins through a silicon quantum dot exchanging a hole with a boron acceptor, demonstrating the role of spin-orbit coupling in creating spin misalignment. Perfect spin alignment may be recovered by means of rotating the applied magnetic-field orientation. This work shows how spin misalignment sets a fundamental upper limit for the spin readout fidelity in quantum-computing systems based on PSB.
References in corpus (24)
- Semiconductor Spin Qubits
- Universal control of a six-qubit quantum processor in silicon
- A four-qubit germanium quantum processor
- Scaling silicon-based quantum computing using CMOS technology: State-of-the-art, Challenges and Perspectives
- A singlet triplet hole spin qubit in planar Ge
- Strong coupling between a photon and a hole spin in silicon
- A single hole spin with enhanced coherence in natural silicon
- High-fidelity operation and algorithmic initialisation of spin qubits above one kelvin
- Strong spin-orbit interaction and -factor renormalization of hole spins in Ge/Si nanowire quantum dots
- Operating semiconductor quantum processors with hopping spins
- Sweet-spot operation of a germanium hole spin qubit with highly anisotropic noise sensitivity
- Coherent spin qubit shuttling through germanium quantum dots
- Universal control of four singlet-triplet qubits
- Variability of electron and hole spin qubits due to interface roughness and charge traps
- Rapid single-shot parity spin readout in a silicon double quantum dot with fidelity exceeding 99 %
- A singlet-triplet hole-spin qubit in MOS silicon
- Small-signal equivalent circuit for double quantum dots at low-frequencies
- Bounds to electron spin qubit variability for scalable CMOS architectures
- Classification and magic magnetic-field directions for spin-orbit-coupled double quantum dots
- Variable and orbital-dependent spin-orbit field orientations in a InSb double quantum dot characterized via dispersive gate sensing
- Multi-module microwave assembly for fast read-out and charge noise characterization of silicon quantum dots
- Non-reciprocal Pauli Spin Blockade in a Silicon Double Quantum Dot
- Unified linear response theory of quantum electronic circuits
- Gate-based spin readout of hole quantum dots with site-dependent factors