Hannover 2003 – wissenschaftliches Programm

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A: Atomphysik

A XIX: HV XIX

A XIX.1: Hauptvortrag

Freitag, 28. März 2003, 12:00–12:30, F342

Attosecond entanglement of protons - Neutron and electron Compton scattering results — •C. Aris C.-Dreismann¹, Tyno Abdul-Redah², and Maarten Vos³ — ¹Inst. f. Chemie, Stranski-Lab., TU Berlin, D-10623 Berlin — ²ISIS Facility, R.A.L., Oxfordshire, OX11 0QX, U.K. — ³Atomic and Molecular Physics Laboratory, Australian National University, Canberra ACT 0200, Australia

Deep inelastic neutron and electron scattering results from protons with energy transfers in the range of ca. 5-100 electron volts are presented and compared with another. These very recent studies have been done on two polymers at room temperature. Both techniques can provide the momentum distributions of H atoms in their vibrational ground state (the so-called Compton profiles). In particular, and in both cases, the duration of the scattering process lies in the attosecond time scale [1,2]. In such short times it is expected that decoherence may still not be fully effective, thus permiting the observation of quantum entanglement effects in condensed matter at ambient conditions [1]. The experimental scattering results reveal the following surprising observation: Ca. 40 percent of the protons do not scatter, i.e. they are No-dqinvisibleNo-dq to the impinging neutrons or electons. This novel effect is due to protonic entanglement in which also electronic degrees of freedom are participating.

[1] C. A. C.-Dreismann et al. Phys. Rev. Lett. 79, 2839 (1997); J. Am. Chem. Soc. 123, 11945 (2001).

[2] M. Voss, Phys. Rev. A 65, 012703 (2002).