Time optimal control based on classification of quantum gates
Sign Up to like & getrecommendations! Published in 2020 at "Quantum Information Processing"
DOI: 10.1007/s11128-020-2602-1
Abstract: We study the minimum time to implement an arbitrary two-qubit gate in two heteronuclear spins systems. We give a systematic characterization of two-qubit gates based on the invariants of local equivalence. The quantum gates are… read more here.
Keywords: two qubit; minimum time; quantum gates; time ... See more keywords
Universal holonomic quantum gates over geometric spin qubits with polarised microwaves
Sign Up to like & getrecommendations! Published in 2018 at "Nature Communications"
DOI: 10.1038/s41467-018-05664-w
Abstract: A microwave shares a nonintuitive phase called the geometric phase with an interacting electron spin after an elastic scattering. The geometric phase, generally discarded as a global phase, allows universal holonomic gating of an ideal… read more here.
Keywords: geometric spin; quantum gates; quantum; phase ... See more keywords
The experimental realization of high-fidelity ‘shortcut-to-adiabaticity’ quantum gates in a superconducting Xmon qubit
Sign Up to like & getrecommendations! Published in 2018 at "New Journal of Physics"
DOI: 10.1088/1367-2630/aac9e7
Abstract: Based on a `shortcut-to-adiabaticity' (STA) scheme, we theoretically design and experimentally realize a set of high-fidelity single-qubit quantum gates in a superconducting Xmon qubit system. Through a precise microwave control, the qubit is driven to… read more here.
Keywords: quantum gates; fidelity; shortcut adiabaticity; high fidelity ... See more keywords
Perturbative tomography of small errors in quantum gates
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review A"
DOI: 10.1103/physreva.103.032421
Abstract: We propose an efficient protocol to fully reconstruct a set of high-fidelity quantum gates. Usually, the efficiency of reconstructing high-fidelity quantum gates is limited by the sampling noise. Our protocol is based on a perturbative… read more here.
Keywords: unital part; quantum gates; perturbative tomography; quantum ... See more keywords
Heralded quantum gates for hybrid systems via waveguide-mediated photon scattering
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review A"
DOI: 10.1103/physreva.104.012608
Abstract: Universal quantum gates play a critical role in quantum information processing. Here, based on the scattering property of photons off single emitters in one-dimensional waveguides, we present some heralded protocols for realizing controlled-not, Toffoli, and… read more here.
Keywords: quantum gates; waveguide; gates hybrid; photon ... See more keywords
Quantum gates robust to secular amplitude drifts
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review A"
DOI: 10.1103/physreva.104.052625
Abstract: Quantum gates are typically vulnerable to imperfections in the classical control fields applied to physical qubits to drive the gates. One approach to reduce this source of error is to break the gate into parts,… read more here.
Keywords: power law; quantum gates; frequency; gates robust ... See more keywords
Criteria for universality of quantum gates
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review A"
DOI: 10.1103/physreva.95.062303
Abstract: We consider the problem of deciding if a set of quantum one-qudit gates $\mathcal{S}=\{U_1,\ldots,U_n\}$ is universal. We provide the compact form criteria leading to a simple algorithm that allows deciding universality of any given set… read more here.
Keywords: criteria universality; quantum gates; universality quantum;
Ultrafast Holonomic Quantum Gates
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review Applied"
DOI: 10.1103/physrevapplied.16.044004
Abstract: Pu Shen,1 Tao Chen,1 and Zheng-Yuan Xue1, 2, ∗ Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, and School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China Guangdong-Hong Kong… read more here.
Keywords: ultrafast holonomic; quantum gates; holonomic quantum; physics ... See more keywords
Metropolis-style random sampling of quantum gates for the estimation of low-energy observables
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review D"
DOI: 10.1103/physrevd.105.034515
Abstract: We propose a quantum algorithm to compute low-energy expectation values of a quantum Hamiltonian by sampling a partition function associated with the average energy of that Hamiltonian. For any given quantum circuit-Hamiltonian pair, there is… read more here.
Keywords: quantum gates; low energy; metropolis style; energy ... See more keywords
Recovering quantum gates from few average gate fidelities
Sign Up to like & getrecommendations! Published in 2018 at "Physical review letters"
DOI: 10.1103/physrevlett.121.170502
Abstract: Characterizing quantum processes is a key task in the development of quantum technologies, especially at the noisy intermediate scale of today's devices. One method for characterizing processes is randomized benchmarking, which is robust against state… read more here.
Keywords: quantum gates; quantum; average gate; recovering quantum ... See more keywords
Wave-Shape-Tolerant Photonic Quantum Gates.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.128.090502
Abstract: Photons, acting as "flying qubits" in propagation geometries such as waveguides, appear unavoidably in the form of wave packets (pulses). The actual shape of the photonic wave packet as well as possible temporal and spectral… read more here.
Keywords: wave shape; shape tolerant; photonic quantum; tolerant photonic ... See more keywords