Phys.org August 23, 2023 Although qubit-based quantum computers can potentially simulate the properties of many-body fermionic systems more efficiently than classical devices, encoding nonlocal fermionic statistics introduces an overhead in the required resources, limiting their applicability on near-term architectures. An international team of researchers (Austria, USA – Harvard University, University of Colorado) has demonstrated a fermionic quantum processor, where fermionic models were locally encoded in a fermionic register and simulated in a hardware-efficient manner using fermionic gates. They considered fermionic atoms in programmable tweezer arrays and developed different protocols to implement nonlocal gates, guaranteeing Fermi statistics at the hardware level. […]
Category Archives: Quantum processor
Connecting distant silicon qubits for scaling up quantum computers
Phys.org March 31, 2023 Among the many qubit platforms, spin qubits in silicon quantum dots are promising for large-scale integration along with their nanofabrication capability. However, linking distant silicon quantum processors is challenging as two-qubit gates in spin qubits typically utilize short-range exchange coupling, which is only effective between nearest-neighbor quantum dots. Coherent shuttling of a spin qubit enables efficient switching of the exchange coupling with an on/off ratio exceeding 1000, while preserving the spin coherence by 99.6% for the single shuttling between neighboring dots. An international team of researchers (Japan, the Netherlands) has demonstrated a two-qubit controlled-phase gate with […]
A scalable and programmable quantum phononic processor based on trapped ions
Phy.org March 17, 2023 While network of bosons has mostly been implemented in optical systems using photons, alternative realizations addressing major limitations in photonic systems such as photon loss have been explored recently. Quantized excitations of vibrational modes of trapped ions are a promising candidate to realize such bosonic networks. An international team of researchers China, Italy, UK) has demonstrated a minimal-loss programmable phononic network in which any phononic state could be deterministically prepared and detected. They created networks with up to four collective vibrational modes, which could be extended to reveal quantum advantage. They benchmarked the performance of the […]