We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Ultimate precision of direct tomography of wave functions.
- Authors
Nguyen, Xuan-Hoai Thi; Choi, Mahn-Soo
- Abstract
In contrast to the standard quantum state tomography, the direct tomography seeks a direct access to the complex values of the wave function at particular positions. Originally put forward as a special case of weak measurement, it has been extended to arbitrary measurement setup. We generalize the idea of "quantum metrology," where a real-valued phase is estimated, to the estimation of complex-valued phase. We show that it enables to identify the optimal measurements and investigate the fundamental precision limit of the direct tomography. We propose a few experimentally feasible examples of direct tomography schemes and, based on the complex phase estimation formalism, demonstrate that direct tomography can reach the Heisenberg limit.
- Subjects
TOMOGRAPHY
- Publication
Quantum Information Processing, 2021, Vol 20, Issue 7, p1
- ISSN
1570-0755
- Publication type
Article
- DOI
10.1007/s11128-021-03167-0