Single-shot qubit readout in circuit quantum electrodynamics
نویسندگان
چکیده
منابع مشابه
Resonant quantum gates in circuit quantum electrodynamics
G. Haack,1 F. Helmer,2 M. Mariantoni,3 F. Marquardt,4 and E. Solano5,6 1Département de Physique Théorique, Université de Genève, CH-1211 Genève 4, Switzerland 2Department of Physics, ASC and CeNS, Ludwig-Maximilians-Universität, Theresienstrasse 37, 80333 München, Germany 3Department of Physics, University of California, Santa Barbara, California 93106, USA 4Institut für Theoretische Physik, Un...
متن کاملHigh-fidelity readout in circuit quantum electrodynamics using the Jaynes-Cummings nonlinearity.
We demonstrate a qubit readout scheme that exploits the Jaynes-Cummings nonlinearity of a superconducting cavity coupled to transmon qubits. We find that, in the strongly driven dispersive regime of this system, there is the unexpected onset of a high-transmission "bright" state at a critical power which depends sensitively on the initial qubit state. A simple and robust measurement protocol ex...
متن کاملCharacterization of a two-transmon processor with individual single-shot qubit readout.
We report the characterization of a two-qubit processor implemented with two capacitively coupled tunable superconducting qubits of the transmon type, each qubit having its own nondestructive single-shot readout. The fixed capacitive coupling yields the sqrt[iSWAP] two-qubit gate for a suitable interaction time. We reconstruct by state tomography the coherent dynamics of the two-bit register as...
متن کاملTunable spin loading and T1 of a silicon spin qubit measured by single-shot readout.
We demonstrate single-shot readout of a silicon quantum dot spin qubit, and we measure the spin relaxation time T1. We show that the rate of spin loading can be tuned by an order of magnitude by changing the amplitude of a pulsed-gate voltage, and the fraction of spin-up electrons loaded can also be controlled. This tunability arises because electron spins can be loaded through an orbital excit...
متن کاملQuantum state and circuit distinguishability with single-qubit measurements
Abstract We show that the Quantum State Distinguishability (QSD), which is a QSZK-complete problem, and the Quantum Circuit Distinguishability (QCD), which is a QIP-complete problem, can be solved by the verifier who can perform only single-qubit measurements. To show these results, we use measurement-based quantum computing: the honest prover sends a graph state to the verifier, and the verifi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature Physics
سال: 2009
ISSN: 1745-2473,1745-2481
DOI: 10.1038/nphys1400