Canonical quantum teleportation
Abstract
Canonically conjugated observables such as position and momentum and phase and number are found to play a threefold role in quantum teleportation. First, the common eigenstate of two commuting canonical observables like phase difference and number sum provides the quantum channel between two systems. Second, a similar pair of canonical observables from another two systems is measured in the Bell-operator measurements. Finally, two translations generated by the canonically conjugated observables of a single system constitute the local unitary operation to recover the unknown state. In addition, the necessary and sufficient condition is presented for a reliable quantum teleportation of finite-level systems.
- Publication:
-
Physical Review A
- Pub Date:
- February 2000
- DOI:
- 10.1103/PhysRevA.61.022310
- arXiv:
- arXiv:quant-ph/0001052
- Bibcode:
- 2000PhRvA..61b2310Y
- Keywords:
-
- 03.67.Hk;
- 03.65.Bz;
- 03.65.Ca;
- 42.50.Dv;
- Quantum communication;
- Formalism;
- Nonclassical states of the electromagnetic field including entangled photon states;
- quantum state engineering and measurements;
- Quantum Physics
- E-Print:
- revtex,4 pages,e-mail:suncp@itp.ac.cn www.itp.ac.cn/~suncp