High-temperature quantum coherence of spinons in a rare-earth spin chain
Connecting theory and experiment While spin-1/2 chains in magnetic crystals have been studied in the past31,32,33,34, to our…
Nanophotonic quantum skyrmions enabled by semiconductor cavity quantum electrodynamics
Skyrme, T. H. R. A non-linear field theory. Proc. R. Soc. A 260, 127–138 (1961). ADS MathSciNet Google…
Exploiting strained epitaxial germanium for scaling low-noise spin qubits at the micrometre scale
Heterostructure growth The Ge/SiGe heterostructure material is grown using reduced-pressure chemical vapour deposition in an ASMI Epsilon 2000…
Deterministic generation of two-dimensional multi-photon cluster states
Device architecture and cluster state generation protocol To generate ladder-like cluster states, we use two transmon qubits whose…
Spin-qubit control with a milli-kelvin CMOS chip
To evaluate single-qubit gates, we first establish a baseline using all room-temperature electronics for control. Following the usual…
Krylov diagonalization of large many-body Hamiltonians on a quantum processor
Theory of Krylov quantum diagonalization KQD consists of two main steps. The first is a quantum subroutine to…
Spectral properties of two superconducting artificial atoms coupled to a resonator in the ultrastrong coupling regime
Device Figure 1a shows an optical microscopy image of the artificial-atom–resonator circuit. The LC resonator is composed of an…
Experimental demonstration of breakeven for a compact fermionic encoding
Arovas, D. P., Berg, E., Kivelson, S. A. & Raghu, S. The Hubbard model. Annu. Rev. Condens. Matter…
Barren plateaus in variational quantum computing
Cerezo, M. et al. Variational quantum algorithms. Nat. Rev. Phys. 3, 625–644 (2021). Review on variational quantum algorithms…
Quantum computers tackle unexplored particle physics
Part of QuEra’s Aquila quantum computer.Credit: QuEra Computing Inc. Subatomic particles such as quarks can pair up when…