Universal Dynamical Decoupling: Two-Qubit States and Beyond

Details Universal Dynamical Decoupling: Two-Qubit States and Beyond Universal Dynamical Decoupling: Two-Qubit States and Beyond

2009-11-09

arxiv.org/abs/0911.1676v2

Phys. Rev. A 81, 012331 (2010)

Physics

Quantum Physics

10 pages, 4 figures, minor changes made, submitted to PRA

Scientific paper

Uhrig's dynamical decoupling pulse sequence has emerged as one universal and highly promising approach to decoherence suppression. So far both the theoretical and experimental studies have examined single-qubit decoherence only. This work extends Uhrig's universal dynamical decoupling from one-qubit to two-qubit systems and even to general multi-level quantum systems. In particular, we show that by designing appropriate control Hamiltonians for a two-qubit or a multi-level system, Uhrig's pulse sequence can also preserve a generalized quantum coherence measure to the order of $1+O(T^{N+1})$, with only $N$ pulses. Our results lead to a very useful scheme for efficiently locking two-qubit entangled states. Future important applications of Uhrig's pulse sequence in preserving the quantum coherence of multi-level quantum systems can also be anticipated.

Affiliated with

Also associated with

No associations

Rating

Universal Dynamical Decoupling: Two-Qubit States and Beyond does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Universal Dynamical Decoupling: Two-Qubit States and Beyond, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Universal Dynamical Decoupling: Two-Qubit States and Beyond will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-660231