Ancilla-assisted quantum process tomography

Details Ancilla-assisted quantum process tomography Ancilla-assisted quantum process tomography

2003-03-07

arxiv.org/abs/quant-ph/0303038v2

Physical Review Letters 90, 193601 (2003)

Physics

Quantum Physics

To appear in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.90.193601

Complete and precise characterization of a quantum dynamical process can be achieved via the method of quantum process tomography. Using a source of correlated photons, we have implemented several methods investigating a wide range of processes, e.g., unitary, decohering, and polarizing. One of these methods, ancilla-assisted process tomography (AAPT), makes use of an additional ``ancilla system,'' and we have theoretically determined the conditions when AAPT is possible. All prior schemes for AAPT make use of entangled states. Our results show that, surprisingly, entanglement is not required for AAPT, and we present process tomography data obtained using an input state that has no entanglement. However, the use of entanglement yields superior results.

Affiliated with

Also associated with

No associations

Rating

Ancilla-assisted quantum process tomography 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 Ancilla-assisted quantum process tomography, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ancilla-assisted quantum process tomography will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-719894