Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session N46: Silicon Qubits III - Control and Readout
11:30 AM–2:30 PM,
Wednesday, March 6, 2024
Room: 200AB
Sponsoring
Unit:
DQI
Chair: Jiawei Wang, State Univ of NY - Buffalo
Abstract: N46.00006 : Two-qubit logic between distant spins in silicon*
12:54 PM–1:06 PM
Presenter:
Jurgen J Dijkema
(TU Delft)
Authors:
Jurgen J Dijkema
(TU Delft)
Xiao Xue
(TU Delft)
Patrick Harvey-Collard
(TU Delft)
Maximillian Rimbach-Russ
(TU Delft)
Sander L de Snoo
(TU Delft)
Guoji Zheng
(TU Delft)
Amir Sammak
(TNO)
Giordano Scappucci
(TU Delft)
Lieven M. K Vandersypen
(TU Delft)
We first show universal single-qubit control over two distant spin qubits separated by 250 µm and characterize their coherence times. Next, we couple the two spins via virtual photons in a superconducting resonator, and show two-qubit iSWAP logic between the distant qubits with an interaction strength of 21 MHz. This frequency is consistent with spectroscopic measurements. Furthermore, we demonstrate that the coupling strength as well as the coherence times of the qubits can be tuned by the inter-dot tunnel coupling and the spin-cavity detuning. In future work we intend to implement single-shot readout and improve the spin lifetimes while dispersively coupled to the resonator. These results pave the way for scalable networks of spin qubits on a chip.
*This research was supported by the European Union’s Horizon 2020 research and innovation programme under the Grant Agreement No. 951852 (QLSI project), the European Research Council (ERC Synergy Quantum Computer Lab), the Dutch Ministry for Economic Affairs through the allowance for Topconsortia for Knowledge and Innovation (TKI), and the Netherlands Organization for Scientific Research (NWO/OCW) as part of the Frontiers of Nanoscience (NanoFront) program.
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