A crossbar network for silicon quantum dot qubits

Li, Ruoyu; Petit, Luca; Franke, David; Dehollain, Juan Pablo; Helsen, Jonas; Steudtner, Mark; Thomas, N.; Yoscovits, Zachary; Singh, Kanwal Jit; Wehner, Stephanie; Vandersypen, L. M. K.; Clarke, James Stanier; Veldhorst, Menno

doi:10.1126/sciadv.aar3960

Cited by 271 publications

(232 citation statements)

References 71 publications

Supporting

Mentioning

231

Contrasting

Unclassified

Order By: Relevance

“…Corresponding constraints and problems were investigated thoroughly since 2015, including the geometry and operation time constraints [177,178], engineering configuration for quantum-classical interface [179][180][181][182], and even the quantifying of system extensibility [183]. In the light of these discussions, several proposals for scaling up were proposed, varying from the crossbar network [38,39] for spin-1/2 qubits in silicon MOS quantum dots, the two dimensional lattice of donor qubits in silicon [35,36], to the hybrid architecture like donor-dot structure [37] and flip-flop qubit structure [113].…”

Section: Scalable Designmentioning

confidence: 99%

“…Till now, single-and twoqubit gate control have been achieved with fidelity above 99.9% [18,33] and 98% [34] respectively, approaching the surface code threshold for fault tolerant computing. Also, thanks to the advanced semiconductor technology, several proposals taking advantage of today's semiconductor processing tools to scale up to 2D grids [35][36][37][38][39] have been put forward. Therefore, it is believed that there is a huge opportunity to realize a scalable fault tolerant semiconductor quantum computer in the future.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Semiconductor quantum computation

Zhang

Cao

et al. 2018

National Science Review

150

View full text Add to dashboard Cite

Semiconductors, a significant type of material in the information era, are becoming more and more powerful in the field of quantum information. In the last decades, semiconductor quantum computation was investigated thoroughly across the world and developed with a dramatically fast speed. The researches vary from initialization, control and readout of qubits, to the architecture of fault tolerant quantum computing. Here, we first introduce the basic ideas for quantum computing, and then discuss the developments of single-and twoqubit gate control in semiconductor. Till now, the qubit initialization, control and readout can be realized with relatively high fidelity and a programmable two-qubit quantum processor was even demonstrated. However, to further improve the qubit quality and scale it up, there are still some challenges to resolve such as the improvement of readout method, material development and scalable designs. We discuss these issues and introduce the forefronts of progress. Finally, considering the positive trend of the research on semiconductor quantum devices and recent theoretical work on the applications of quantum computation, we anticipate that semiconductor quantum computation may develop fast and will have a huge impact on our lives in the near future.

show abstract

Section: Scalable Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Semiconductor quantum computation

Zhang

Cao

et al. 2018

National Science Review

150

View full text Add to dashboard Cite

show abstract

“…Reaching this level of control in silicon metal-oxide-semiconductor (SiMOS) quantum dots is highly desired as this platform has a high potential for complete integration with classical manufacturing technology [14][15][16]. However, current two-qubit logic with single spins in SiMOS is based on controlling the exchange using the detuning only [17] or is executed at fixed exchange interaction [18].In SiMOS, a first step toward the required control to materialize architectures for large-scale quantum computation [1,[19][20][21][22][23][24] has been the demonstration of tunable coupling in a double quantum dot system operated in the many-electron regime, where gaining control is more accessible owing to the larger electron wave function [25]. More recently, exchange-controlled two-qubit operations have been shown with three-electron quantum dots [26].…”

mentioning

confidence: 99%

Tunable Coupling and Isolation of Single Electrons in Silicon Metal-Oxide-Semiconductor Quantum Dots

et al. 2019

View full text Add to dashboard Cite

Extremely long coherence times, excellent single-qubit gate fidelities, and two-qubit logic have been demonstrated with silicon metal-oxide-semiconductor spin qubits, making it one of the leading platforms for quantum information processing. Despite this, a long-standing challenge in this system has been the demonstration of tunable tunnel coupling between single electrons. Here we overcome this hurdle with gate-defined quantum dots and show couplings that can be tuned on and off for quantum operations. We use charge sensing to discriminate between the (2,0) and (1,1) charge states of a double quantum dot and show excellent charge sensitivity. We demonstrate tunable coupling up to 13 GHz, obtained by fitting charge polarization lines, and tunable tunnel rates down to <1 Hz, deduced from the random telegraph signal. The demonstration of tunable coupling between single electrons in a silicon metal-oxide-semiconductor device provides significant scope for high-fidelity two-qubit logic toward quantum information processing with standard manufacturing.

show abstract

“…1) permits extremely dense qubit arrays but aggravates the interconnect challenges. Existing proposals for dense 2D spin qubit arrays [13,14] assume either a device density or material homogeneity that remains to be achieved. Another approach involves a network architecture, where qubits are arranged in small-cluster nodes, interconnected by long-range entanglement distribution channels, with the goal of creating space for easing the density requirements of the interconnects [12].…”

Section: Introductionmentioning

confidence: 99%