Article

Rapid optimization of working parameters of microwave-driven multilevel qubits for minimal gate leakage.

Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, USA.
Physical Review Letters (impact factor: 7.37). 10/2005; 95(12):120501. pp.120501
Source: PubMed

ABSTRACT We propose an effective method to optimize the working parameters (WPs) of microwave-driven quantum gates implemented with multilevel qubits. We show that by treating transitions between each pair of levels independently, intrinsic gate errors due primarily to population leakage to undesired states can be determined by spectroscopic properties of the qubits and minimized by choosing proper WPs. The validity and efficiency of the approach are demonstrated by applying it to optimize the WPs of two coupled rf SQUID flux qubits for controlled-not operation. The result of this independent transition approximation (ITA) is in good agreement with that of dynamic method (DM). The ratio of the speed of ITA to that of DM scales exponentially as 2(n) when the number of qubits n increases.

0 0
 · 
0 Bookmarks
 · 
27 Views
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.

Keywords

controlled-not operation
 
DM
 
DM scales exponentially
 
dynamic method
 
effective method
 
good agreement
 
independent transition approximation
 
intrinsic gate errors due
 
microwave-driven quantum gates
 
multilevel qubits
 
optimize
 
proper WPs
 
qubits
 
rf SQUID flux qubits
 
treating transitions
 
working parameters
 
WPs