Isolated vibrational wavepackets in D{sub 2}{sup +}: Defining superposition conditions and wavepacket distinguishability

Journal Article · Thu Nov 15 04:00:00 EST 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.053402· OSTI ID:21028022

Bryan, W A; English, E M. L.; Wood, J; Newell, W R ^[1]; McKenna, J; Calvert, C R; Murphy, D S; McCann, J F; Williams, I D ^[2]; Torres, R ^[3]; Turcu, I C. E.; Collier, J L ^[4]

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1. Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT (United Kingdom)
2. Department of Pure and Applied Physics, Queen's University Belfast, Belfast BT7 1NN (United Kingdom)
3. Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2BW (United Kingdom)
4. Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX (United Kingdom)

Tunnel ionization of room-temperature D{sub 2} in an ultrashort (12 femtosecond) near infrared (800 nm) pump laser pulse excites a vibrational wavepacket in the D{sub 2}{sup +} ions; a rotational wavepacket is also excited in residual D{sub 2} molecules. Both wavepacket types are collapsed a variable time later by an ultrashort probe pulse. We isolate the vibrational wavepacket and quantify its evolution dynamics through theoretical comparison. Requirements for quantum computation (initial coherence and quantum state retrieval) are studied using this well-defined (small number of initial states at room temperature, initial wavepacket spatially localized) single-electron molecular prototype by temporally stretching the pump and probe pulses.

• OSTI ID: 21028022
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 76; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
COMPARATIVE EVALUATIONS
DEUTERIUM
DEUTERIUM IONS
ELECTRONS
HYDROGEN IONS
INFRARED SPECTRA
IONIZATION
LASER RADIATION
MOLECULES
PHOTOIONIZATION
PHOTON-MOLECULE COLLISIONS
PROBES
PULSES
PUMPING
QUANTUM COMPUTERS
ROTATIONAL STATES
TEMPERATURE RANGE 0273-0400 K
TUNNEL EFFECT
VIBRATIONAL STATES
WAVE PACKETS