Conditional Teleportation of Quantum-Dot Spin States

Abstract

Among the different platforms for quantum information processing, individual electron spins in semiconductor quantum dots stand out for their long coherence times and potential for scalable fabrication. The past years have witnessed substantial progress in the capabilities of spin qubits. However, coupling between distant electron spins, which is required for quantum error correction, presents a challenge, and this goal remains the focus of intense research. Quantum teleportation is a canonical method to transmit qubit states, but it has not been implemented in quantum-dot spin qubits. Here, we present evidence for quantum teleportation of electron spin qubits in semiconductor quantum dots. Although we have not performed quantum state tomography to definitively assess the teleportation fidelity, our data are consistent with conditional teleportation of spin eigenstates, entanglement swapping, and gate teleportation. Such evidence for all-matter spin-state teleportation underscores the capabilities of exchange-coupled spin qubits for quantum-information transfer.

12+27 pages, 4+15 figures

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• A >99.9%-fidelity quantum-dot spin qubit with coherence limited by charge noise
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• Realization of Deterministic Quantum Teleportation with Solid State Qubits
• Reduced sensitivity to charge noise in semiconductor spin qubits via symmetric operation
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• Suppressing qubit dephasing using real-time Hamiltonian estimation
• Composite pulses for robust universal control of singlet-triplet qubits
• Rapid high-fidelity gate-based spin read-out in silicon
• Gate-based single-shot readout of spins in silicon
• A Reconfigurable Gate Architecture for Si/SiGe Quantum Dots
• Coherent shuttle of electron-spin states
• Single-Spin CCD
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• Coherence and Screening in Multi-Electron Spin Qubits
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• Spin-Blockade Spectroscopy of Si/SiGe Quantum Dots

Cited by in corpus (16)

• Qubits made by advanced semiconductor manufacturing
• Review of performance metrics of spin qubits in gated semiconducting nanostructures
• Adiabatic quantum state transfer in a semiconductor quantum-dot spin chain
• Bell-state generation for spin qubits via dissipative coupling
• Long-Distance Superexchange between Semiconductor Quantum-Dot Electron Spins
• Analog Quantum Simulation of the Dynamics of Open Quantum Systems with Quantum Dots and Microelectronic Circuits
• Autonomous quantum absorption refrigerators
• Quantum computing on magnetic racetracks with flying domain wall qubits
• Enhanced quantum state transfer: Circumventing quantum chaotic behavior
• Flying Spin Qubits in Quantum Dot Arrays Driven by Spin-Orbit Interaction
• Charge states, triple points and quadruple points in an InAs nanowire triple quantum dot revealed by an integrated charge sensor
• Orbital and electronic entanglement in quantum teleportation schemes
• Nonmonotonic buildup of spin-singlet correlations in a double quantum dot
• Probing Green's Function Zeros by Co-tunneling through Mott Insulators
• Protecting coherence from the environment via Stark many-body localization in a Quantum-Dot Simulator
• Thermal control across a chain of electronic nanocavities