https://doi.org/10.1140/epjd/e2015-60342-x
Regular Article
Weak measurement combined with quantum delayed-choice experiment and implementation in optomechanical system
1 School of Physics and Optoelectronic
Technology, Dalian University of Technology, Dalian
116024, P.R.
China
2 College of Physics, Jilin University,
Changchun
130012, P.R.
China
3 School of Physics and Optoelectronics
Technology, Fujian Normal University, Fuzhou
350007, P.R.
China
a
e-mail: ligang0311@sina.cn
Received:
8
June
2015
Received in final form:
15
September
2015
Published online:
3
December
2015
Weak measurement [Y. Aharonov, D.Z. Albert, L. Vaidman, Phys. Rev. Lett. 60, 1351 (1988); C. Simon, E.S. Polzik, Phys. Rev. A 83, 040101(R) (2011)] combined with quantum delayed-choice experiment that use Controlled Hadamard gate instead of Hadamard gate in quantum networks give rise to a surprising amplification effect, i.e., counterintuitive negative amplification effect. We show that this effect is caused by the wave and particle behaviours of the system, and it can’t be explained by a semiclassical wave theory [D. Suter, Phys. Rev. A 51, 45 (1995); J.C. Howell, D.J. Starling, P.B. Dixon, P.K. Vudyasetu, A.N. Jordan, Phys. Rev. A 81, 033813 (2010); N. Brunner, A. Acín, D. Collins, N. Gisin, V. Scarani, Phys. Rev. Lett. 91, 180402 (2003)] and by the statistical feature of preselection and postselection with disturbance [C. Ferrie, J. Combes, Phys. Rev. Lett. 113, 120404 (2014)], due to the entanglement of the system and the ancilla in Controlled Hadamard gate. The generation mechanism with wave-particle duality in quantum mechanics lead us to a scheme for implementation of weak measurement in optomechanical system.
Key words: Quantum Optics
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2015