Quantum process tomography of two-qubit controlled-Z and controlled-NOT gates using superconducting phase qubits
T. Yamamoto,T. Yamamoto,Matthew Neeley,Erik Lucero,Radoslaw C. Bialczak,Julian Kelly,M. Lenander,Matteo Mariantoni,A. D. O’Connell,Daniel Sank,Haohua Wang,Martin Weides,James Wenner,Yi Yin,Andrew Cleland,John M. Martinis +15 more
TLDR
In this paper, the authors demonstrate quantum process tomography of controlled-Z and controlled-NOT gates using capacitively coupled superconducting phase qubits and obtain a process fidelity of 0.70 for the controlled phase and 0.56 for controlled-not gate, with the loss of fidelity mostly due to single-qubit decoherence.Abstract:
We experimentally demonstrate quantum process tomography of controlled-Z and controlled-NOT gates using capacitively coupled superconducting phase qubits. These gates are realized by using the $|2⟩$ state of the phase qubit. We obtain a process fidelity of 0.70 for the controlled phase and 0.56 for the controlled-NOT gate, with the loss of fidelity mostly due to single-qubit decoherence. The controlled-Z gate is also used to demonstrate a two-qubit Deutsch-Jozsa algorithm with a single function query.read more
Citations
More filters
Journal ArticleDOI
Quantum information processing with superconducting circuits: a review
TL;DR: The time is ripe for describing some of the recent development of superconducting devices, systems and applications as well as practical applications of QIP, such as computation and simulation in Physics and Chemistry.
Journal ArticleDOI
Circuit quantum electrodynamics
TL;DR: The field of circuit quantum electrodynamics (QED) as discussed by the authors was initiated by Josephson-junction-based superconducting circuits and has become an independent and thriving field of research in its own right.
Journal ArticleDOI
Qubit Architecture with High Coherence and Fast Tunable Coupling
Yu Chen,Charles Neill,Pedram Roushan,Nelson Leung,Michael Fang,Rami Barends,Julian Kelly,Brooks Campbell,Zijun Chen,Benjamin Chiaro,Andrew Dunsworth,Evan Jeffrey,A. Megrant,Josh Mutus,Peter O'Malley,Chris Quintana,Daniel Sank,Amit Vainsencher,James Wenner,Ted White,Michael R. Geller,Andrew Cleland,John M. Martinis +22 more
TL;DR: A superconducting qubit architecture that combines high-coherence qubits and tunable qubit-qubit coupling that can be tuned dynamically with nanosecond resolution is introduced, making this architecture a versatile platform with applications ranging from quantum logic gates to quantum simulation.
Journal ArticleDOI
Implementation of a Toffoli gate with superconducting circuits
TL;DR: In this article, the Toffoli gate was implemented with three transmon qubits coupled to a microwave resonator, achieving a phase fidelity of 68.5 ± 0.5 per cent.
Journal ArticleDOI
Computing prime factors with a Josephson phase qubit quantum processor
Erik Lucero,Rami Barends,Yu Chen,Julian Kelly,Matteo Mariantoni,A. Megrant,Peter O'Malley,Daniel Sank,Amit Vainsencher,James Wenner,Ted White,Yi Yin,Andrew Cleland,John M. Martinis +13 more
TL;DR: Shor's quantum algorithm factorizes integers as discussed by the authors, and implementing this is a benchmark test in the early development of quantum processors, and it has been used to demonstrate this important test in a solid-state system.
References
More filters
Book
Quantum Computation and Quantum Information
TL;DR: In this article, the quantum Fourier transform and its application in quantum information theory is discussed, and distance measures for quantum information are defined. And quantum error-correction and entropy and information are discussed.
Quantum Computation and Quantum Information
TL;DR: This chapter discusses quantum information theory, public-key cryptography and the RSA cryptosystem, and the proof of Lieb's theorem.
Atom-photon interactions
TL;DR: In this article, the physical phenomena resulting from the interactions between atoms and photons are discussed in a self-contained way and can be studied independently, and different theoretical approaches are discussed.
Related Papers (5)
Superconducting quantum circuits at the surface code threshold for fault tolerance
Rami Barends,Julian Kelly,A. Megrant,Andrzej Veitia,Daniel Sank,Evan Jeffrey,Ted White,Josh Mutus,Austin G. Fowler,Brooks Campbell,Yu Chen,Zijun Chen,Benjamin Chiaro,Andrew Dunsworth,Charles Neill,Peter O'Malley,Pedram Roushan,Amit Vainsencher,James Wenner,Alexander N. Korotkov,Andrew Cleland,John M. Martinis +21 more