Entangling gates on degenerate spin qubits dressed by a global field
- URL: http://arxiv.org/abs/2311.09567v2
- Date: Fri, 1 Dec 2023 00:39:33 GMT
- Title: Entangling gates on degenerate spin qubits dressed by a global field
- Authors: Ingvild Hansen, Amanda E. Seedhouse, Santiago Serrano, Andreas Nickl,
MengKe Feng, Jonathan Y. Huang, Tuomo Tanttu, Nard Dumoulin Stuyck, Wee Han
Lim, Fay E. Hudson, Kohei M. Itoh, Andre Saraiva, Arne Laucht, Andrew S.
Dzurak, Chih Hwan Yang
- Abstract summary: Coherently dressed spins have shown promising results as building blocks for future quantum computers.
We demonstrate simultaneous on-resonance driving of degenerate qubits using a global field while retaining addressability for qubits with equal Larmor frequencies.
- Score: 0.2857543431855809
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Coherently dressed spins have shown promising results as building blocks for
future quantum computers owing to their resilience to environmental noise and
their compatibility with global control fields. This mode of operation allows
for more amenable qubit architecture requirements and simplifies signal routing
on the chip. However, multi-qubit operations, such as qubit addressability and
two-qubit gates, are yet to be demonstrated to establish global control in
combination with dressed qubits as a viable path to universal quantum
computing. Here we demonstrate simultaneous on-resonance driving of degenerate
qubits using a global field while retaining addressability for qubits with
equal Larmor frequencies. Furthermore, we implement SWAP oscillations during
on-resonance driving, constituting the demonstration of driven two-qubit gates.
Significantly, our findings highlight the fragility of entangling gates between
superposition states and how dressing can increase the noise robustness. These
results represent a crucial milestone towards global control operation with
dressed qubits. It also opens a door to interesting spin physics on degenerate
spins.
Related papers
- Native two-qubit gates in fixed-coupling, fixed-frequency transmons beyond cross-resonance interaction [1.0797934175846036]
Cross-resonance gates have been the workhorse of fixed-coupling, fixed-frequency superconducting processors.
Here, we use on-resonant and off-resonant microwave drives to go beyond cross-resonance.
We show native two-qubit gates are better than their counterparts compiled from cross-resonance gates.
arXiv Detail & Related papers (2023-10-18T17:57:04Z) - Qubit readouts enabled by qubit cloaking [49.1574468325115]
Time-dependent drives play a crucial role in quantum computing efforts.
They enable single-qubit control, entangling logical operations, as well as qubit readout.
Qubit cloaking was introduced in Lled'o, Dassonneville, et al.
arXiv Detail & Related papers (2023-05-01T15:58:25Z) - Cat-qubit-inspired gate on cos($2\theta$) qubits [77.34726150561087]
We introduce a single-qubit $Z$ gate inspired by the noise-bias preserving gate of the Kerr-cat qubit.
This scheme relies on a $pi$ rotation in phase space via a beamsplitter-like transformation between a qubit and ancilla qubit.
arXiv Detail & Related papers (2023-04-04T23:06:22Z) - Two qubits in one transmon -- QEC without ancilla hardware [68.8204255655161]
We show that it is theoretically possible to use higher energy levels for storing and controlling two qubits within a superconducting transmon.
The additional qubits could be used in algorithms which need many short-living qubits in error correction or by embedding effecitve higher connectivity in qubit networks.
arXiv Detail & Related papers (2023-02-28T16:18:00Z) - Multi-squeezed state generation and universal bosonic control via a
driven quantum Rabi model [68.8204255655161]
Universal control over a bosonic degree of freedom is key in the quest for quantum-based technologies.
Here we consider a single ancillary two-level system, interacting with the bosonic mode of interest via a driven quantum Rabi model.
We show that it is sufficient to induce the deterministic realization of a large class of Gaussian and non-Gaussian gates, which in turn provide universal bosonic control.
arXiv Detail & Related papers (2022-09-16T14:18:53Z) - Influence of errors on the transport of quantum information through
distant quantum dot spin qubits [0.0]
We model the quantum dot spin qubits by a spin chain with nearest-neighbors interaction.
Within this model, we can perform the interaction of distant qubits by the action of consecutive SWAP gates.
The order of the SWAP and CNOT gates is important and it can lead to a relevant difference in fidelity when the number of qubits is large.
arXiv Detail & Related papers (2022-08-05T12:10:44Z) - Learning Noise via Dynamical Decoupling of Entangled Qubits [49.38020717064383]
Noise in entangled quantum systems is difficult to characterize due to many-body effects involving multiple degrees of freedom.
We develop and apply multi-qubit dynamical decoupling sequences that characterize noise that occurs during two-qubit gates.
arXiv Detail & Related papers (2022-01-26T20:22:38Z) - Quantum crosstalk analysis for simultaneous gate operations on
superconducting qubits [12.776712619117092]
We study the impact of quantum crosstalk on simultaneous gate operations in a qubit architecture.
Our analysis shows that for microwave-driven single-qubit gates, the dressing from the qubit-qubit coupling can cause non-negligible cross-driving errors.
arXiv Detail & Related papers (2021-10-25T01:21:04Z) - Scalable and robust quantum computing on qubit arrays with fixed
coupling [0.0]
We propose a scheme for scalable and robust quantum computing on two-dimensional arrays of qubits with fixed longitudinal coupling.
This opens the possibility for bypassing the device complexity associated with tunable couplers required in conventional quantum computing hardware.
arXiv Detail & Related papers (2021-10-14T21:45:49Z) - The SMART protocol -- Pulse engineering of a global field for robust and
universal quantum computation [0.7080990243618377]
We show that by modulating a global field simultaneously applied to the entire array, we are able to encode qubits that are less sensitive to the statistical scatter in qubit resonance frequency and microwave amplitude fluctuations.
This work provides a high-fidelity qubit operation scheme in a global field, significantly improving the prospects for scalability of spin-based quantum computer architectures.
arXiv Detail & Related papers (2021-08-02T10:44:55Z) - Moving beyond the transmon: Noise-protected superconducting quantum
circuits [55.49561173538925]
superconducting circuits offer opportunities to store and process quantum information with high fidelity.
Noise-protected devices constitute a new class of qubits in which the computational states are largely decoupled from local noise channels.
This Perspective reviews the theoretical principles at the heart of these new qubits, describes recent experiments, and highlights the potential of robust encoding of quantum information in superconducting qubits.
arXiv Detail & Related papers (2021-06-18T18:00:13Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.