Related papers: Exchange control in a MOS double quantum dot made using a 300 mm wafer process

Exchange control in a MOS double quantum dot made using a 300 mm wafer process

URL: http://arxiv.org/abs/2408.01241v2
Date: Sat, 10 Aug 2024 18:02:11 GMT
Title: Exchange control in a MOS double quantum dot made using a 300 mm wafer process
Authors: Jacob F. Chittock-Wood, Ross C. C. Leon, Michael A. Fogarty, Tara Murphy, Sofia M. Patomäki, Giovanni A. Oakes, Felix-Ekkehard von Horstig, Nathan Johnson, Julien Jussot, Stefan Kubicek, Bogdan Govoreanu, David F. Wise, M. Fernando Gonzalez-Zalba, John J. L. Morton,
Abstract summary: Recent studies of quantum dots fabricated on 300 mm wafer metal-oxide-semiconductor (MOS) processes have shown control and readout of individual spin qubits. We demonstrate coherent control of two electron spins using the spin-spin exchange interaction, forming the basis of an entangling gate. Our results demonstrate an industrial grade platform for two-qubit operations, alongside integration with dispersive sensing techniques.
Score: 0.6212050938816976
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Leveraging the advanced manufacturing capabilities of the semiconductor industry promises to help scale up silicon-based quantum processors by increasing yield, uniformity and integration. Recent studies of quantum dots fabricated on 300 mm wafer metal-oxide-semiconductor (MOS) processes have shown control and readout of individual spin qubits, yet quantum processors require two-qubit interactions to operate. Here, we use a 300 mm wafer MOS process customized for spin qubits and demonstrate coherent control of two electron spins using the spin-spin exchange interaction, forming the basis of an entangling gate such as $\sqrt{\text{SWAP}}$. We observe gate dephasing times of up to $T_2^{*}\approx500$ ns and a gate quality factor of 10. We further extend the coherence by up to an order of magnitude using an echo sequence. For readout, we introduce a dispersive readout technique, the radiofrequency electron cascade, that amplifies the signal while retaining the spin-projective nature of dispersive measurements. Our results demonstrate an industrial grade platform for two-qubit operations, alongside integration with dispersive sensing techniques.

Related papers

Probing single electrons across 300 mm spin qubit wafers [0.0]
We present a testing process using a cryogenic 300 mm wafer prober to collect high-volume data on the performance of hundreds of industry-manufactured spin qubit devices at 1.6 K. We analyze the random variation in single-electron operating voltages and find that the optimized fabrication process leads to low levels of disorder at the 300 mm scale.
arXiv Detail & Related papers (2023-07-10T18:02:55Z)
An integrated microwave-to-optics interface for scalable quantum computing [47.187609203210705]
We present a new design for an integrated transducer based on a superconducting resonator coupled to a silicon photonic cavity. We experimentally demonstrate its unique performance and potential for simultaneously realizing all of the above conditions. Our device couples directly to a 50-Ohm transmission line and can easily be scaled to a large number of transducers on a single chip.
arXiv Detail & Related papers (2022-10-27T18:05:01Z)
Modelling semiconductor spin qubits and their charge noise environment for quantum gate fidelity estimation [0.9406493726662083]
The spin of an electron confined in semiconductor quantum dots is a promising candidate for quantum bit (qubit) implementations. We present here a co-modelling framework for double quantum dot (DQD) devices and their charge noise environment. We find an inverse correlation between quantum gate errors and quantum dot confinement.
arXiv Detail & Related papers (2022-10-10T10:12:54Z)
Tunable photon-mediated interactions between spin-1 systems [68.8204255655161]
We show how to harness multi-level emitters with several optical transitions to engineer photon-mediated interactions between effective spin-1 systems. Our results expand the quantum simulation toolbox available in cavity QED and quantum nanophotonic setups.
arXiv Detail & Related papers (2022-06-03T14:52:34Z)
Precision tomography of a three-qubit donor quantum processor in silicon [38.42250061908039]
Nuclear spins were among the first physical platforms to be considered for quantum information processing. We demonstrate universal quantum logic operations using a pair of ion-implanted 31P donor nuclei in a silicon nanoelectronic device.
arXiv Detail & Related papers (2021-06-06T10:30:38Z)
Multidimensional cluster states using a single spin-photon interface coupled strongly to an intrinsic nuclear register [48.7576911714538]
Photonic cluster states are a powerful resource for measurement-based quantum computing and loss-tolerant quantum communication. We propose the generation of multi-dimensional lattice cluster states using a single, efficient spin-photon interface coupled strongly to a nuclear register.
arXiv Detail & Related papers (2021-04-26T14:41:01Z)
Information Scrambling in Computationally Complex Quantum Circuits [56.22772134614514]
We experimentally investigate the dynamics of quantum scrambling on a 53-qubit quantum processor. We show that while operator spreading is captured by an efficient classical model, operator entanglement requires exponentially scaled computational resources to simulate.
arXiv Detail & Related papers (2021-01-21T22:18:49Z)
A Frequency-Multiplexed Coherent Electro-Optic Memory in Rare Earth Doped Nanoparticles [94.37521840642141]
Quantum memories for light are essential components in quantum technologies like long-distance quantum communication and distributed quantum computing. Recent studies have shown that long optical and spin coherence lifetimes can be observed in rare earth doped nanoparticles. We report on coherent light storage in Eu$3+$:Y$$O$_3$ nanoparticles using the Stark Echo Modulation Memory (SEMM) quantum protocol.
arXiv Detail & Related papers (2020-06-17T13:25:54Z)
Conditional quantum operation of two exchange-coupled single-donor spin qubits in a MOS-compatible silicon device [48.7576911714538]
Silicon nanoelectronic devices can host single-qubit quantum logic operations with fidelity better than 99.9%. For the spins of an electron bound to a single donor atom, introduced in the silicon by ion implantation, the quantum information can be stored for nearly 1 second. Here we demonstrate the conditional, coherent control of an electron spin qubit in an exchange-coupled pair of $31$P donors implanted in silicon.
arXiv Detail & Related papers (2020-06-08T11:25:16Z)
Spin readout of a CMOS quantum dot by gate reflectometry and spin-dependent tunnelling [0.0]
We report the measurement of an electron spin in a singly-occupied gate-defined quantum dot fabricated using CMOS processes at the 300 mm wafer scale. We demonstrate spin readout in two devices using this technique, obtaining valley splittings in the range 0.5-0.7 meV using excited state spectroscopy. These long lifetimes indicate the silicon nanowire geometry and fabrication processes employed here show a great deal of promise for qubit devices.
arXiv Detail & Related papers (2020-05-15T19:52:18Z)

This list is automatically generated from the titles and abstracts of the papers in this site.