Affiliation:
1. Departmento de Química‐Física Universidad del País Vasco UPV/EHU Leioa 48940 Spain
2. IKERBASQUE Basque Foundation for Science Plaza Euskadi 5 Bilbao 48009 Spain
3. EHU Quantum Center Universidad del País Vasco UPV/EHU Leioa 48940 Spain
4. Departamento de Física y IUdEA Universidad de La Laguna La Laguna Tenerife Spain
Abstract
AbstractQuantum mechanics, in its orthodox version, imposes severe limits on what can be known, or even said, about the condition of a quantum system between two observations. A relatively new approach, based on so‐called “weak measurements”, suggests that such forbidden knowledge can be gained by studying the system's response to an inaccurate weakly perturbing measuring device. It goes further to propose revising the whole concept of physics variables, and offers various examples of counterintuitive quantum behavior. Both views go to the very heart of quantum theory, and yet are rarely compared directly. A new technique must either transcend the orthodox limits, or just prove that these limits are indeed necessary. Both possibilities are studied and orthodoxy is vindicated.
Funder
Hezkuntza, Hizkuntza Politika Eta Kultura Saila, Eusko Jaurlaritza
Subject
General Physics and Astronomy