Path integral simulation of exchange interactions in CMOS spin qubits

• URL: http://arxiv.org/abs/2307.03455v3
• Date: Thu, 3 Aug 2023 15:58:26 GMT
• Title: Path integral simulation of exchange interactions in CMOS spin qubits
• Authors: Jes\'us D. Cifuentes, Philip Y. Mai, Fr\'ed\'eric Schlattner, H. Ekmel Ercan, MengKe Feng, Christopher C. Escott, Andrew S. Dzurak, Andre Saraiva
• Abstract summary: We present a PIMC algorithm that estimates exchange interactions of three-dimensional electrically defined quantum dots. As an application, we study the impact of a single charge trap on two exchanging dots, opening the possibility of using this code to test the tolerance to disorder of CMOS devices.
• Score: 0.6742864446722399
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The boom of semiconductor quantum computing platforms created a demand for computer-aided design and fabrication of quantum devices. Path integral Monte Carlo (PIMC) can have an important role in this effort because it intrinsically integrates strong quantum correlations that often appear in these multi-electron systems. In this paper we present a PIMC algorithm that estimates exchange interactions of three-dimensional electrically defined quantum dots. We apply this model to silicon metal-oxide-semiconductor (MOS) devices and we benchmark our method against well-tested full configuration interaction (FCI) simulations. As an application, we study the impact of a single charge trap on two exchanging dots, opening the possibility of using this code to test the tolerance to disorder of CMOS devices. This algorithm provides an accurate description of this system, setting up an initial step to integrate PIMC algorithms into development of semiconductor quantum computers.

Related papers

• Quantum Electrodynamics Coupled-Cluster Theory: Exploring Photon-Induced Electron Correlations [0.1666604949258699]
  We present our successful implementation of the quantum electrodynamics coupled-cluster method with single and double excitations. We discuss theoretical foundations, algorithmic details, and numerical benchmarks to demonstrate how the integration of bosonic degrees of freedom alters the electronic ground state.
  arXiv  Detail & Related papers  (2024-09-10T20:48:47Z)
• Efficient Learning for Linear Properties of Bounded-Gate Quantum Circuits [63.733312560668274]
  Given a quantum circuit containing d tunable RZ gates and G-d Clifford gates, can a learner perform purely classical inference to efficiently predict its linear properties? We prove that the sample complexity scaling linearly in d is necessary and sufficient to achieve a small prediction error, while the corresponding computational complexity may scale exponentially in d. We devise a kernel-based learning model capable of trading off prediction error and computational complexity, transitioning from exponential to scaling in many practical settings.
  arXiv  Detail & Related papers  (2024-08-22T08:21:28Z)
• Quantum computation of conical intersections on a programmable superconducting quantum processor [10.064448021157139]
  Conical intersections (CIs) are pivotal in many photochemical processes. We present the first successful realization of a hybrid quantum-classical state-average complete active space self-consistent method.
  arXiv  Detail & Related papers  (2024-02-20T04:12:40Z)
• Divide-and-conquer variational quantum algorithms for large-scale electronic structure simulations [8.97527581134124]
  Two popular divide-and-conquer schemes are employed to divide complicated problems into many small parts that are easy to implement on near-term quantum computers. Pilot applications of these methods to systems consisting of tens of atoms are performed with adaptive VQE algorithms.
  arXiv  Detail & Related papers  (2022-08-31T12:07:53Z)
• Recompilation-enhanced simulation of electron-phonon dynamics on IBM Quantum computers [62.997667081978825]
  We consider the absolute resource cost for gate-based quantum simulation of small electron-phonon systems. We perform experiments on IBM quantum hardware for both weak and strong electron-phonon coupling. Despite significant device noise, through the use of approximate circuit recompilation we obtain electron-phonon dynamics on current quantum computers comparable to exact diagonalisation.
  arXiv  Detail & Related papers  (2022-02-16T19:00:00Z)
• Quantum-Classical Hybrid Algorithm for the Simulation of All-Electron Correlation [58.720142291102135]
  We present a novel hybrid-classical algorithm that computes a molecule's all-electron energy and properties on the classical computer. We demonstrate the ability of the quantum-classical hybrid algorithms to achieve chemically relevant results and accuracy on currently available quantum computers.
  arXiv  Detail & Related papers  (2021-06-22T18:00:00Z)
• Quantum Markov Chain Monte Carlo with Digital Dissipative Dynamics on Quantum Computers [52.77024349608834]
  We develop a digital quantum algorithm that simulates interaction with an environment using a small number of ancilla qubits. We evaluate the algorithm by simulating thermal states of the transverse Ising model.
  arXiv  Detail & Related papers  (2021-03-04T18:21:00Z)
• 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)
• CMOS Quantum Computing: Toward A Quantum Computer System-on-Chip [0.0]
  CMOS technology provides potential for the integration of qubits with their control and readout circuits on a single chip. This paves the way for the realization of a large-scale quantum computing system.
  arXiv  Detail & Related papers  (2020-12-16T15:36:17Z)
• Simulation Methodology for Electron Transfer in CMOS Quantum Dots [0.0]
  We model electron transport in semiconductor qubits based on an advanced CMOS technology. We demonstrate an order reduction and the steps necessary to obtain ordinary differential equations on probability amplitudes in a multi-particle system.
  arXiv  Detail & Related papers  (2020-06-24T23:50:21Z)
• Simulation of Thermal Relaxation in Spin Chemistry Systems on a Quantum Computer Using Inherent Qubit Decoherence [53.20999552522241]
  We seek to take advantage of qubit decoherence as a resource in simulating the behavior of real world quantum systems. We present three methods for implementing the thermal relaxation. We find excellent agreement between our results, experimental data, and the theoretical prediction.
  arXiv  Detail & Related papers  (2020-01-03T11:48:11Z)

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.