Purification of Mixed State with Closed Timelike Curve is not Possible

Physics – Quantum Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Latex2e, No Figs, 4 + pages, An error corrected, Results unchanged

Scientific paper

10.1103/PhysRevA.84.062325

In ordinary quantum theory any mixed state can be purified in an enlarged Hilbert space by bringing an ancillary system. The purified state does not depend on the state of any extraneous system with which the mixed state is going to interact and on the physical interaction. Here, we prove that it is not possible to purify a mixed state that traverses a closed time like curve (CTC) and allowed to interact in a consistent way with a causality-respecting (CR) quantum system in the same manner. Thus, in general for arbitrary interactions between CR and CTC systems there is no universal 'Church of the larger Hilbert space' for mixed states with CTC. This shows that in quantum theory with CTCs there can exist 'proper' and 'improper' mixtures.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Purification of Mixed State with Closed Timelike Curve is not Possible 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 Purification of Mixed State with Closed Timelike Curve is not Possible, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Purification of Mixed State with Closed Timelike Curve is not Possible will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-206942

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.