Electrostatically defined silicon quantum dots with counted antimony donor implants

Singh, Meenakshi; Pacheco, Jose L; Perry, Daniel; Garratt, Elias; Eyck, G. Ten; Bishop, Nathaniel; Wendt, Joel R.; Manginell, Ron; Dominguez, Jason; Pluym, Tammy; Luhman, Dwight; Bielejec, Edward S.; Lilly, Michael; Carroll, Malcolm S.

doi:10.1063/1.4940421

Cited by 25 publications

(26 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nevertheless, experience suggests that it may take quite some time to build multi-qubit systems. Possible routes may be on-chip coupling of implanted impurity spin arrays [515], or photonic coupling of individual spin qubits.…”

Section: Looking Aroundmentioning

confidence: 99%

Quantum information processing with superconducting circuits: a review

2017

View full text Add to dashboard Cite

During the last ten years, superconducting circuits have passed from being interesting physical devices to becoming contenders for near-future useful and scalable quantum information processing (QIP). Advanced quantum simulation experiments have been shown with up to nine qubits, while a demonstration of quantum supremacy with fifty qubits is anticipated in just a few years. Quantum supremacy means that the quantum system can no longer be simulated by the most powerful classical supercomputers. Integrated classical-quantum computing systems are already emerging that can be used for software development and experimentation, even via web interfaces. Therefore, the time is ripe for describing some of the recent development of superconducting devices, systems and applications. As such, the discussion of superconducting qubits and circuits is limited to devices that are proven useful for current or near future applications. Consequently, the centre of interest is the practical applications of QIP, such as computation and simulation in Physics and Chemistry.

show abstract

Section: Looking Aroundmentioning

confidence: 99%

Quantum information processing with superconducting circuits: a review

2017

View full text Add to dashboard Cite

show abstract

“…In addition, searching for the elusive donor-donor coupling 10 is bypassed by the tunability of the QD-donor coupling. Due to the statistical straggle of donor implantation, the exact location of a donor can be estimated to within only tens of nanometers, so more donors than are necessary are implanted to ensure that a donor is placed in a target zone 11,12 . We study the effects of various quantities of implanted donors on the low frequency charge noise and show that, for certain devices, the process of implanting donors does not affect the charge noise.…”

Section: Introductionmentioning

confidence: 99%

Long-term drift of Si-MOS quantum dots with intentional donor implants

Rudolph

Sarabi

Murray

et al. 2019

Sci Rep

Self Cite

View full text Add to dashboard Cite

Charge noise can be detrimental to the operation of quantum dot (QD) based semiconductor qubits. We study the low-frequency charge noise by charge offset drift measurements for Si-MOS devices with intentionally implanted donors near the QDs. We show that the MOS system exhibits non-equilibrium drift characteristics, in the form of transients and discrete jumps, that are not dependent on the properties of the donor implants. The equilibrium charge noise indicates a 1/ f noise dependence, and a noise strength as low as , comparable to that reported in more model GaAs and Si/SiGe systems (which have also not been implanted). We demonstrate that implanted qubits, therefore, can be fabricated without detrimental effects on long-term drift or 1/ f noise for devices with less than 50 implanted donors near the qubit.

show abstract

“…Assembling these exceptional solid-state qubits into a full quantum processor, as first envisioned by Kane [7], will require coupling donor atoms to one another in a controllable way. This has proven extremely challenging, demanding near-atomic precision in the placement of the donors [8][9][10][11][12]. In contrast, single electron spins confined in quantum dots (QDs) [13][14][15][16] are routinely coupled to one another since quantum dots are highly tunable and fabricated in engineered locations, allowing for controllable and scalable two-qubit interactions [13,[17][18][19][20].…”

mentioning

confidence: 99%

Coherent coupling between a quantum dot and a donor in silicon

et al. 2017

View full text Add to dashboard Cite

Individual donors in silicon chips are used as quantum bits with extremely low error rates. However, physical realizations have been limited to one donor because their atomic size causes fabrication challenges. Quantum dot qubits, in contrast, are highly adjustable using electrical gate voltages. This adjustability could be leveraged to deterministically couple donors to quantum dots in arrays of qubits. In this work, we demonstrate the coherent interaction of a 31P donor electron with the electron of a metal-oxide-semiconductor quantum dot. We form a logical qubit encoded in the spin singlet and triplet states of the two-electron system. We show that the donor nuclear spin drives coherent rotations between the electronic qubit states through the contact hyperfine interaction. This provides every key element for compact two-electron spin qubits requiring only a single dot and no additional magnetic field gradients, as well as a means to interact with the nuclear spin qubit.

show abstract

Electrostatically defined silicon quantum dots with counted antimony donor implants

Cited by 25 publications

References 24 publications

Quantum information processing with superconducting circuits: a review

Quantum information processing with superconducting circuits: a review

Long-term drift of Si-MOS quantum dots with intentional donor implants

Coherent coupling between a quantum dot and a donor in silicon

Contact Info

Product

Resources

About