Decoherence-full subsystems and the cryptographic power of a private shared reference frame
| dc.creator | Bartlett, Stephen D. | |
| dc.creator | Rudolph, Terry | |
| dc.creator | Spekkens, Robert W. | |
| dc.date | 2004-03-23 | |
| dc.date | 2004-09-23 | |
| dc.date.accessioned | 2026-07-07T06:09:22Z | |
| dc.date.available | 2026-07-07T06:09:22Z | |
| dc.description | We show that private shared reference frames can be used to perform private quantum and private classical communication over a public quantum channel. Such frames constitute a novel type of private shared correlation (distinct from private classical keys or shared entanglement) useful for cryptography. We present optimally efficient schemes for private quantum and classical communication given a finite number of qubits transmitted over an insecure channel and given a private shared Cartesian frame and/or a private shared reference ordering of the qubits. We show that in this context, it is useful to introduce the concept of a decoherence-full subsystem, wherein every state is mapped to the completely mixed state under the action of the decoherence. | |
| dc.description | 13 pages, published version | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0403161 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0403161 | |
| dc.identifier | Phys. Rev. A 70, 032307 (2004) | |
| dc.identifier | doi:10.1103/PhysRevA.70.032307 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/91933 | |
| dc.subject | Quantum Physics | |
| dc.title | Decoherence-full subsystems and the cryptographic power of a private shared reference frame | |
| dc.type | text |