Shaping photons: quantum computation with bosonic cQED

Abstract

With its rich dynamics, the quantum harmonic oscillator is an innate platform for understanding real-world quantum systems and could even excel as the heart of a quantum computer. A particularly promising and rapidly advancing platform that harnesses quantum harmonic oscillators for information processing is the bosonic circuit quantum electrodynamics (cQED) system. In this article, we provide perspectives on the progress, challenges, and future directions in building a bosonic cQED quantum computer. We describe the main hardware building blocks and how they facilitate quantum error correction, metrology, and simulation. We conclude with our views of the key challenges that lie on the horizon, as well as scientific and cultural strategies for overcoming them and building a practical quantum computer with bosonic cQED hardware.

References in corpus (34)

• Supplementary information for "Quantum supremacy using a programmable superconducting processor"
• Charge insensitive qubit design derived from the Cooper pair box
• Quantum Phases of Matter on a 256-Atom Programmable Quantum Simulator
• Resolving photon number states in a superconducting circuit
• Reconstruction of non-classical cavity field states with snapshots of their decoherence
• Confining the state of light to a quantum manifold by engineered two-photon loss
• Real-time quantum error correction beyond break-even
• First results from a microwave cavity axion search at 24 micro-eV
• A No-Go Theorem for Gaussian Quantum Error Correction
• Building a fault-tolerant quantum computer using concatenated cat codes
• Beating the break-even point with a discrete-variable-encoded logical qubit
• Thermal and Residual Excited-State Population in a 3D Transmon Qubit
• Fast Universal Control of an Oscillator with Weak Dispersive Coupling to a Qubit
• Minimal resonator loss for circuit quantum electrodynamics
• Moving beyond the transmon: Noise-protected superconducting quantum circuits
• Superconducting cavity qubit with tens of milliseconds single-photon coherence time
• A perspective on hybrid quantum opto- and electromechanical systems
• Scqubits: a Python package for superconducting qubits
• Quantum dynamics of an electromagnetic mode that cannot contain N photons
• Experimental demonstration of entanglement assisted coding using a two-mode squeezed vacuum state
• Democratization of Quantum Technologies
• Disentangling Losses in Tantalum Superconducting Circuits
• Seamless high-Q microwave cavities for multimode circuit QED
• Dual-rail encoding with superconducting cavities
• One hundred second bit-flip time in a two-photon dissipative oscillator
• Quantum correlations in optical metrology: Heisenberg-limited phase estimation without mode entanglement
• Observation of Josephson Harmonics in Tunnel Junctions
• High-fidelity parametric beamsplitting with a parity-protected converter
• Two-level system hyperpolarization using a quantum Szilard engine
• Observation of wave-packet branching through an engineered conical intersection
• Non-Markovian Effects of Two-Level Systems in a Niobium Coaxial Resonator with a Single-Photon Lifetime of 10 ms
• Hamiltonian Extrema of an Arbitrary Flux-Biased Josephson Circuit
• High-performance repetition cat code using fast noisy operations
• Demonstrating a superconducting dual-rail cavity qubit with erasure-detected logical measurements

Cited by in corpus (14)

• Quantum Machine Learning in Drug Discovery: Applications in Academia and Pharmaceutical Industries
• Simulating Chemistry on Bosonic Quantum Devices
• Hybrid Oscillator-Qubit Quantum Processors: Instruction Set Architectures, Abstract Machine Models, and Applications
• Certifiable Lower Bounds of Wigner Negativity Volume and Non-Gaussian Entanglement with Conditional Displacement Gates
• Demonstrating efficient and robust bosonic state reconstruction via optimized excitation counting
• Engineering the Nonlinearity of Bosonic Modes with a Multi-loop SQUID
• A Computational Framework for Simulations of Dissipative Non-Adiabatic Dynamics on Hybrid Oscillator-Qubit Quantum Devices
• Simulating electronic structure on bosonic quantum computers
• Low crosstalk modular flip-chip architecture for coupled superconducting qubits
• Witnessing genuine multipartite entanglement in phase space with controlled Gaussian unitaries
• Sufficient Wigner Negativity Implies Genuine Multipartite Entanglement
• Direct estimation of arbitrary observables of an oscillator
• Degeneracy beyond the parity-symmetry protection in one-dimensional spinless models: The parity-violating Kerr parametric oscillator
• Cavity Mode Initialization via a Rabi Driven Qubit