Fine tuning of phase qubit parameters for optimization of fast single-pulse readout

Journal Article · Mon Apr 18 00:00:00 EDT 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3582615· OSTI ID:21518398

Revin, Leonid S; Pankratov, Andrey L ^[1]

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1. Institute for Physics of Microstructures of RAS, GSP-105, Nizhny Novgorod (Russian Federation)

We analyze a two-level quantum system, describing the phase qubit, during a single-pulse readout process by a numerical solution of the time-dependent Schroedinger equation. It has been demonstrated that the readout error has a minimum for certain values of the system's basic parameters. In particular, the optimization of the qubit capacitance and the readout pulse shape leads to significant reduction in the readout error. It is shown that in an ideal case the fidelity can be increased to almost 97% for 2 ns pulse duration and to 96% for 1 ns pulse duration.

• OSTI ID: 21518398
• Journal Information: Applied Physics Letters, Vol. 98, Issue 16; Other Information: DOI: 10.1063/1.3582615; (c) 2011 American Institute of Physics; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CAPACITANCE
ERRORS
NUMERICAL ANALYSIS
NUMERICAL SOLUTION
OPTIMIZATION
PULSE SHAPERS
PULSES
QUANTUM COMPUTERS
QUANTUM INFORMATION
QUBITS
READOUT SYSTEMS
SCHROEDINGER EQUATION
SIMULATION
TIME DEPENDENCE
COMPUTERS
DIFFERENTIAL EQUATIONS
ELECTRICAL PROPERTIES
ELECTRONIC CIRCUITS
EQUATIONS
INFORMATION
MATHEMATICAL SOLUTIONS
MATHEMATICS
PARTIAL DIFFERENTIAL EQUATIONS
PHYSICAL PROPERTIES
PULSE CIRCUITS
SIGNAL CONDITIONERS
WAVE EQUATIONS