We demonstrate by use of continuous wave- and pulse-electron paramagnetic resonance spectroscopy on oriented single crystals of magnetically dilute Yb ions in YbLu(trensal) that molecular entangled two-qubit systems can be constructed by exploiting dipolar interactions between neighboring Yb centers. Furthermore, we show that the phase memory time and Rabi frequencies of these dipolar-interaction-coupled entangled two-qubit systems are comparable to the ones of the corresponding single qubits.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9912257 | PMC |
| http://dx.doi.org/10.1021/jacs.2c10902 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Regression of Concurrence via Local Unitary Invariants.
Entropy (Basel)
October 2024
College of Science, China University of Petroleum, Qingdao 266580, China.
Article Synopsis
- Concurrence is an important measure in quantum theory that quantifies the degree of entanglement between qubits, and local unitary invariants can effectively describe quantum states' properties.
- This paper proposes using local unitary invariants with advanced statistical methods (like multiple regression and neural networks) to predict concurrence in 2-qubit quantum states, which can be more efficient than traditional quantum state tomography.
- The study achieves a high prediction accuracy of 98.5% for concurrence across various two-qubit quantum states by deriving a functional formula based on the correlation of data from pure states and Werner states.
Entanglement and iSWAP gate between molecular qubits.
Nature
November 2024
Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA.
Quantum computation and simulation rely on long-lived qubits with controllable interactions. Trapped polar molecules have been proposed as a promising quantum computing platform, offering scalability and single-particle addressability while still leveraging inherent complexity and strong couplings of molecules. Recent progress in the single quantum state preparation and coherence of the hyperfine-rotational states of individually trapped molecules allows them to serve as promising qubits, with intermolecular dipolar interactions creating entanglement.
View Article and Find Full Text PDFUnbounded Sharing of Nonlocality Using Qubit Projective Measurements.
Phys Rev Lett
October 2024
Indian Institute of Technology Hyderabad, Kandi, Sangareddy, Telengana 502285, India.
The prevailing consensus is that the sequential sharing of nonlocality in a Bell experiment requires generalized unsharp measurements, given that a sharp measurement inevitably destroys the entanglement of the shared state. In contrast, a recent work [A. Steffinlongo and A.
View Article and Find Full Text PDFIndividually addressed entangling gates in a two-dimensional ion crystal.
Nat Commun
November 2024
Center for Quantum Information, Institute for Interdisciplinary Information Sciences, Tsinghua University, Beijing, PR China.
Two-dimensional (2D) ion crystals may represent a promising path to scale up qubit numbers for ion trap quantum information processing. However, to realize universal quantum computing in this system, individually addressed high-fidelity two-qubit entangling gates still remain challenging due to the inevitable micromotion of ions in a 2D crystal as well as the technical difficulty in 2D addressing. Here we demonstrate two-qubit entangling gates between any ion pairs in a 2D crystal of four ions.
View Article and Find Full Text PDFUniversal control of four singlet-triplet qubits.
Nat Nanotechnol
October 2024
QuTech, Delft University of Technology, Delft, Netherlands.
The coherent control of interacting spins in semiconductor quantum dots is of strong interest for quantum information processing and for studying quantum magnetism from the bottom up. Here we present a 2 × 4 germanium quantum dot array with full and controllable interactions between nearest-neighbour spins. As a demonstration of the level of control, we define four singlet-triplet qubits in this system and show two-axis single-qubit control of each qubit and SWAP-style two-qubit gates between all neighbouring qubit pairs, yielding average single-qubit gate fidelities of 99.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!