Parametric longitudinal coupling between a high-impedance superconducting resonator and a semiconductor quantum dot singlet-triplet spin qubit

Abstract

Long-distance two-qubit coupling, mediated by a superconducting resonator, is a leading paradigm for performing entangling operations in a quantum computer based on spins in semiconducting materials. Here, we demonstrate a novel, controllable spin-photon coupling based on a longitudinal interaction between a spin qubit and a resonator. We show that coupling a singlet-triplet qubit to a high-impedance superconducting resonator can produce the desired longitudinal coupling when the qubit is driven near the resonator's frequency. We measure the energy splitting of the qubit as a function of the drive amplitude and frequency of a microwave signal applied near the resonator antinode, revealing pronounced effects close to the resonator frequency due to longitudinal coupling. By tuning the amplitude of the drive, we reach a regime with longitudinal coupling exceeding $1$ MHz. This demonstrates a new mechanism for qubit-resonator coupling, and represents a stepping stone towards producing high-fidelity two-qubit gates mediated by a superconducting resonator.

References in corpus (13)

• High-sensitivity diamond magnetometer with nanoscale resolution
• Driven coherent oscillations of a single electron spin in a quantum dot
• Quantum computing with trapped ions
• Electrically driven single electron spin resonance in a slanting Zeeman field
• Qubit-photon interactions in a cavity: Measurement induced dephasing and number splitting
• Electrometry Using Coherent Exchange Oscillations in a Singlet-Triplet-Qubit
• Strong Coupling of a Single Electron in Silicon to a Microwave Photon
• Deterministic entanglement of ions in thermal states of motion
• Coherent spin qubit transport in silicon
• Circuit Quantum Electrodynamics Architecture for Gate-Defined Quantum Dots in Silicon
• Long-Distance Superexchange between Semiconductor Quantum-Dot Electron Spins
• On-chip microwave filters for high-impedance resonators with gate-defined quantum dots
• Modulated longitudinal gates on encoded spin-qubits via curvature couplings to a superconducting cavity

Cited by in corpus (21)

• Semiconductor Spin Qubits
• Two-qubit logic between distant spins in silicon
• Strong coupling between a microwave photon and a singlet-triplet qubit
• Tunable hole spin-photon interaction based on g-matrix modulation
• A singlet-triplet hole-spin qubit in MOS silicon
• Hole spin qubits in thin curved quantum wells
• High-fidelity two-qubit gates of hybrid superconducting-semiconducting singlet-triplet qubits
• Longitudinal coupling between a Si/SiGe quantum dot and an off-chip TiN resonator
• Phase driving hole spin qubits
• Cavity-mediated entanglement of parametrically driven spin qubits via sidebands
• Coupling of hole double quantum dot in planar germanium to a microwave cavity
• Unifying Floquet theory of longitudinal and dispersive readout
• Ultra-dispersive resonator readout of a quantum-dot qubit using longitudinal coupling
• A photonic which-path entangler based on longitudinal cavity-qubit coupling
• Toward Axion Signal Extraction in Semiconductor Spin Qubits Via Spectral Engineering
• Dispersive cavity-mediated quantum gate between driven dot-donor nuclear spins
• Parametric longitudinal coupling of a semiconductor charge qubit and a RF resonator
• Spin-photon interaction in a nanowire quantum dot with asymmetrical confining potential
• Kinetic inductance coupling for circuit QED with spins
• Nonequilibrium quantum thermometry with noncommutative system-bath couplings
• Quantum-Hall Spectroscopy of Elliptically Deformed Graphene Nanobubble Qubits