Subwavelength position measurements with running-wave driving fields

Abstract

Subwavelength position measurement of quantum particles is discussed. Our setup is based on a closed-loop driving-field configuration, which enforces a sensitivity of the particle dynamics to the phases of the applied fields. Thus, running wave fields are sufficient, avoiding limitations associated with standing-wave-based localization schemes. Reversing the directions of the driving laser fields switches between different magnification levels for the position determination. This allows us to optimize the localization, and at the same time eliminates the need for additional classical measurements common to all previous localization schemes based on spatial periodicity.

Subbarrier Fusion Reactions and Many-Particle Quantum Tunneling

“…10) The energy dissipation may occur also before the touching as a consequence of particle transfer processes to highly excited states in the target nucleus. 112) The phenomenon of deep subbarrier fusion hindrance may therefore be a realization of dissipative quantum tunneling, which has been extensively studied in many fields of physics and chemistry. A characteristic feature in nuclear fusion, which is absent or may not be important in dissipative tunneling in other fields, is that the couplings to (internal) environmental degrees of freedom gradually set in.…”

Subwavelength Atom Localization

“…Atom localization based on monitoring of fluorescence has also been shown to be possible for running waves as opposed to standing waves (Evers & Qamar, 2011).…”

Transmission and Reflection properties of the incident Light via SW coherent laser field

“…One of the most important * Author to whom any correspondence should be addressed. phenomena that has many applications in quantum systems is related to the position-dependent coherent optical effect [7][8][9][10][11]. Numerous quantum optical phenomena, including electromagnetically induced transparency [6], lasing without inversion [12], multi-wave mixing [13], increasing Kerr nonlinearity [14][15][16], optical soliton [4], optical bistability and multi-stability [17][18][19], and others [20][21][22][23][24][25] have attracted the interest of many researchers.…”