Measuring the size of a Schroedinger cat state
| dc.creator | Marquardt, Florian | |
| dc.creator | Abel, Benjamin | |
| dc.creator | von Delft, Jan | |
| dc.date | 2006-09-01 | |
| dc.date.accessioned | 2026-07-07T09:51:55Z | |
| dc.date.available | 2026-07-07T09:51:55Z | |
| dc.description | We propose a measure for the "size" of a Schroedinger cat state, i.e. a quantum superposition of two many-body states with (supposedly) macroscopically distinct properties, by counting how many single-particle operations are needed to map one state onto the other. This definition gives sensible results for simple, analytically tractable cases and is consistent with a previous definition restricted to Greenberger-Horne-Zeilinger-like states. We apply our measure to the experimentally relevant, nontrivial example of a superconducting three-junction flux qubit put into a superposition of left- and right-circulating supercurrent states and find this Schroedinger cat to be surprisingly small. | |
| dc.description | 5 pages, 3 figures | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0609007 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0609007 | |
| dc.identifier | Phys. Rev. A 78, 012109 (2008). | |
| dc.identifier | doi:10.1103/PhysRevA.78.012109 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/165416 | |
| dc.subject | Quantum Physics | |
| dc.title | Measuring the size of a Schroedinger cat state | |
| dc.type | text |