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allied
academies
August 23-24, 2018 | Paris, France
Laser, Optics and Photonics
International Conference on
Journal of Materials Science and Nanotechnology | Volume: 2
Overcooled gas flow assisted quantum computing
Konstantin Lyakhov
Jeju National University, South Korea
T
his paper is addressed to possibility of implementation of
quantum computations by resonant excitation of target
isotopologues in overcooled gas flow. The phenomena of
quantum states population control by the sequence of laser
pulses is proposed to employ. For optimal control of excitation
laser pulses should be specifically shaped to selective excite
target isotoplogue. Moreover, their periodicity also plays
essential role. Supersonically overcooled and rarefied gas
flow can be thought as a quantum Turing machine, because
molecular spectra are well resolved and have rather long
lifetime. Therefore, better control over them by laser field
can be implemented. Decoherence level in this ensemble
of molecules and clusters, representing gas flow, can be
controlled by its rarefaction degree and extension. Evolution
of quantum states population is guided by the sequence of
femtosecond lasers installed along the gas flow direction. Each
laser emits laser pulse of predesigned shape, which is related
to some command written for the quantum computer (unitary
transformation). Thus, the quantum state in the end of gas
flow is the result of calculation. If gas flow transition time is not
long enough to complete all sequence of required commands,
received final state (intermediate solution) is recorded and
translated into laser pulse shape, assigned for initialization.
Otherwise, initialization laser pulse is step-likewith intensity just
high enough to excite all isotopologues to the same quantum
state. Final quantum state of the gas flow is read by the classical
computer by finalizing measurement, which is implemented
as following: Once irradiated gas flow feeds spectrometer,
where electrons, corresponding to resulting quantum state,
are ejected by applied ionizing laser pulse. Obtained electron
energy spectra, bearing information of original optical
spectrum, are recorded by the network of surrounding
electrodes, and then amplified. By analog-digital convertor
electrical currents induced on electrodes are transformed into
digital format for further processing on the classical computer.
e:
:
lyakhov2000@yahoo.com