Teoria quântica da informação: impossibilidade de cópia, entrelaçamento e teletransporte
Revista Brasileira de Ensino de FísicaA idéia de desenvolver computadores cuja dinâmica obedeça às leis da Mecânica Quântica data do Ultimo quarto do seculo XX e assume, nos dias de hoje, importancia tecnológica e cientifica notável, uma vez que o uso de algoritmos quânticos se disseminou na
José Roberto Castilho Piqueira
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A Qubit Represented by the Oscillator’s Quantum States in Magnetic Resonance Force Microscopy
Magnetochemistry, 2022 We consider magnetic resonance force microscopy (MRFM) in the situation when the frequency of the electron spin resonance matches the fundamental frequency of the cantilever with a ferromagnetic particle attached to its tip.
Panayiotis Christou +1 more
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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 +5 more
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Invariant-Parameterized Exact Evolution Operator for SU(2) Systems with Time-Dependent Hamiltonian
Entropy, 2023 We report the step-by-step construction of the exact, closed and explicit expression for the evolution operator U(t) of a localized and isolated qubit in an arbitrary time-dependent field, which for concreteness we assume to be a magnetic field.
Hiromichi Nakazato +3 more
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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 +4 more
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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 +10 more
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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 +2 more
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Polylogarithmic-depth controlled-NOT gates without ancilla qubits
Nature CommunicationsControlled 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 +5 more
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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 +4 more
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