Results 41 to 50 of about 248,307 (193)

Coupling superconducting flux qubits at optimal point via dynamic decoupling with the quantum bus [PDF]

Phys. Rev. B, 79, 024502 (2009), 2008
We propose a scheme with dc-control of finite bandwidth to implement two-qubit gate for superconducting flux qubits at the optimal point. We provide a detailed non-perturbative analysis on the dynamic evolution of the qubits interacting with a common quantum bus.
arxiv   +1 more source

High-Fidelity Z-Measurement Error Correction of Optical Qubits [PDF]

, 2004
We demonstrate a quantum error correction scheme that protects against accidental measurement, using an encoding where the logical state of a single qubit is encoded into two physical qubits using a non-deterministic photonic CNOT gate.
A. G. White, G. J. Pryde, J. L. O’Brien, M. A. Nielsen, T. C. Ralph, T. C. Ralph   +5 more
core   +2 more sources

Qubit energy tuner based on single flux quantum circuits

Frontiers in Physics, 2023
A device called the qubit energy tuner (QET), based on single flux quantum (SFQ) circuits, has been proposed for Z control of superconducting qubits. The QET is created by improving flux digital-to-analog converters (flux DACs).
Xiao Geng, Xiao Geng, Kaiyong He, Kaiyong He, Rutian Huang, Rutian Huang, Jianshe Liu, Jianshe Liu, Wei Chen, Wei Chen, Wei Chen   +10 more
doaj   +1 more source

Tunable coupling in circuit quantum electrodynamics with a superconducting V-system

, 2010
Recent progress in superconducting qubits has demonstrated the potential of these devices for the future of quantum information processing. One desirable feature for quantum computing is independent control of qubit interactions as well as qubit energies.
A. A. Houck, A. J. Hoffman, J. M. Gambetta, S. Haroche, S. J. Srinivasan   +4 more
core   +1 more source

Polylogarithmic-depth controlled-NOT gates without ancilla qubits

Nature Communications
Controlled operations are fundamental building blocks of quantum algorithms. Decomposing n-control-NOT gates (C n (X)) into arbitrary single-qubit and CNOT gates, is a crucial but non-trivial task.
Baptiste Claudon, Julien Zylberman, César Feniou, Fabrice Debbasch, Alberto Peruzzo, Jean-Philip Piquemal   +5 more
doaj   +1 more source

Development of Grating for the Optical Addressing of Sr⁺ Ions With Data Analysis Techniques

IEEE Photonics Journal, 2023
In this study, SiN-based gratings with various radius of curvature (r) are designed and fabricated for the optical addressing of trapped Sr+ ion.
Yu Dian Lim, Peng Zhao, Luca Guidoni, Jean-Pierre Likforman, Chuan Seng Tan   +4 more
doaj   +1 more source

Optimal two-qubit quantum circuits using exchange interactions

, 2005
The Heisenberg exchange interaction is a natural method to implement non-local (i.e., multi-qubit) quantum gates in quantum information processing. We consider quantum circuits comprising of $(SWAP)^\alpha $ gates, which are realized through the exchange
Fan, Heng, Roychowdhury, Vwani, Szkopek, Thomas   +2 more
core   +1 more source

Shortcut to chemically accurate quantum computing via density-based basis-set correction

Communications Chemistry
Using GPU-accelerated state-vector emulation, we propose to embed a quantum computing ansatz into density-functional theory via density-based basis-set corrections to obtain quantitative quantum-chemistry results on molecules that would otherwise require
Diata Traore, Olivier Adjoua, César Feniou, Ioanna-Maria Lygatsika, Yvon Maday, Evgeny Posenitskiy, Kerstin Hammernik, Alberto Peruzzo, Julien Toulouse, Emmanuel Giner, Jean-Philip Piquemal   +10 more
doaj   +1 more source

Entanglement of two qubits interacting with one-mode quantum field

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2015
In the present paper we investigate the dynamics of the system of two twolevel natural or artificial atoms, in which only one atom couples to a thermal one-mode field in finite-Q cavity, since one of them can move around the cavity.
Eugene K Bashkirov, Michail S Mastyugin
doaj   +1 more source

Qubit dynamics in an external laser field [PDF]

Компьютерная оптика, 2019
In this paper, dynamics of a qubit in an external laser field is investigated for the non-Markov environment described by an Ornstein-Uhlenbeck process. A non-linear non-Markovian stochastic Schrödinger equation is derived for the quantum system.
Daniil Vasilev, Vitalii Semin
doaj   +1 more source