Reconstructing quantum states efficiently

Details Reconstructing quantum states efficiently Reconstructing quantum states efficiently

2010-02-19

arxiv.org/abs/1002.3780v2

Physics

Quantum Physics

4 pages, 1 figure. See arxiv:1002.3839 for a closely related result

Scientific paper

Quantum state tomography, the ability to deduce the density matrix of a quantum system from measured data, is of fundamental importance for the verification of present and future quantum devices. It has been realized in systems with few components but for larger systems it becomes rapidly infeasible because the number of quantum measurements and computational resources required to process them grow exponentially in the system size. Here we show that we can gain an exponential advantage over direct state tomography for quantum states typically realized in nature. Based on singular value thresholding and matrix product state methods we introduce a state reconstruction scheme that relies only on a linear number of measurements. The computational resources for the postprocessing required to reconstruct the state with high fidelity from these measurements is polynomial in the system size.

Affiliated with

Also associated with

No associations

Rating

Reconstructing quantum states efficiently 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 Reconstructing quantum states efficiently, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reconstructing quantum states efficiently will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-363999