THz devices are used for Earth's (and other planets) atmospheric remote sensing, astronomica... more THz devices are used for Earth's (and other planets) atmospheric remote sensing, astronomical investigation of interstellar dust medium, and life detection instruments for in-situ probing of the planet's surfaces. As the radio astronomy science community demands observations at ...
Bulletin of the American Physical Society, May 20, 2009
It has long been known that matter-wave gyroscopes are orders of magnitude more sensitive that op... more It has long been known that matter-wave gyroscopes are orders of magnitude more sensitive that optical gyroscopes. The creation of matter-wave currents that can achieve such sensitivity is a continuing challenge. We propose the use of Optical Angular Momentum (OAM) induced vortices in Bose-Einstein Condensates (BECs) as an ideal candidate for quantum gyroscopy. Coherent superpositions of left and right rotating quantum states of a trapped condensate lead to an interference pattern that rotates when the trap rotates---in accordance with the ...
Part I: The problem of Bose-Einstein condensation of an ideal gas is dealt with to determine the ... more Part I: The problem of Bose-Einstein condensation of an ideal gas is dealt with to determine the condensate statistics. A brief description of the inter-relations between various ensembles of statistical mechanics is given. Thereafter, various canonical ensemble methods applied to the trapped ideal Bose gas are discussed in great detail. Further, strategies to convert the canonical ensemble results into the microcanonical ensemble description are also discussed. Part II: Various topics bound by a common theme based on the principle of atomic coherence are studied in the second part. First a scheme exploiting interference of incoherent pump processes to achieve strong control over the total spontaneous emission from a three-level atom is discussed. Thereafter various schemes to achieve radiative cooling without the presence of spontaneous emission on the cooling transition are considered. This allows cooling to an internal absolute zero of temperature in an atomic system in very smal...
The Rochester Conferences on Coherence and Quantum Optics and the Quantum Information and Measurement meeting, 2013
We present methods for microscopy beyond the Rayleigh limit through the phenomena of coherent pop... more We present methods for microscopy beyond the Rayleigh limit through the phenomena of coherent population oscillations. The atomic fluorescence shows sharp spatial features offering resolution below one nanometer using spatially shaped pump and probe beams.
The Rochester Conferences on Coherence and Quantum Optics and the Quantum Information and Measurement meeting, 2013
We present methods for optical excitation of coherent superpositions of vortices in Bose-Einstein... more We present methods for optical excitation of coherent superpositions of vortices in Bose-Einstein Condensates through coupling with orbital angular momentum of light. We discussion applications to quantum information, gyroscopy and generation of Schrodinger Cat states.
Frontiers in Optics 2009/Laser Science XXV/Fall 2009 OSA Optics & Photonics Technical Digest, 2009
We have theoretically devised and are experimentally implementing schemes for simultaneous measur... more We have theoretically devised and are experimentally implementing schemes for simultaneous measurement of polarization and orbital angular momentum (OAM) of light with the aim of understanding light carrying OAM emitted by rapidly rotating astrophysical objects.
We present a coherent population trapping based scheme to attain sub-nanoscale resolution for ato... more We present a coherent population trapping based scheme to attain sub-nanoscale resolution for atom localization, microscopy and lithography. Our method uses three-level atoms coupled to amplitude modulated probe field and spatially dependent drive field. The modulation of the probe field allows us to tap into the steep dispersion normally associated with electromagnetically induced transparency and offers an avenue to attain sub-nanometer resolution using just optical fields. We illustrate application of the techniques to the area of microscopy and lithography and show how multilevel schemes offer the possibility of improving resolution further.
THz devices are used for Earth's (and other planets) atmospheric remote sensing, astronomica... more THz devices are used for Earth's (and other planets) atmospheric remote sensing, astronomical investigation of interstellar dust medium, and life detection instruments for in-situ probing of the planet's surfaces. As the radio astronomy science community demands observations at ...
Bulletin of the American Physical Society, May 20, 2009
It has long been known that matter-wave gyroscopes are orders of magnitude more sensitive that op... more It has long been known that matter-wave gyroscopes are orders of magnitude more sensitive that optical gyroscopes. The creation of matter-wave currents that can achieve such sensitivity is a continuing challenge. We propose the use of Optical Angular Momentum (OAM) induced vortices in Bose-Einstein Condensates (BECs) as an ideal candidate for quantum gyroscopy. Coherent superpositions of left and right rotating quantum states of a trapped condensate lead to an interference pattern that rotates when the trap rotates---in accordance with the ...
Part I: The problem of Bose-Einstein condensation of an ideal gas is dealt with to determine the ... more Part I: The problem of Bose-Einstein condensation of an ideal gas is dealt with to determine the condensate statistics. A brief description of the inter-relations between various ensembles of statistical mechanics is given. Thereafter, various canonical ensemble methods applied to the trapped ideal Bose gas are discussed in great detail. Further, strategies to convert the canonical ensemble results into the microcanonical ensemble description are also discussed. Part II: Various topics bound by a common theme based on the principle of atomic coherence are studied in the second part. First a scheme exploiting interference of incoherent pump processes to achieve strong control over the total spontaneous emission from a three-level atom is discussed. Thereafter various schemes to achieve radiative cooling without the presence of spontaneous emission on the cooling transition are considered. This allows cooling to an internal absolute zero of temperature in an atomic system in very smal...
The Rochester Conferences on Coherence and Quantum Optics and the Quantum Information and Measurement meeting, 2013
We present methods for microscopy beyond the Rayleigh limit through the phenomena of coherent pop... more We present methods for microscopy beyond the Rayleigh limit through the phenomena of coherent population oscillations. The atomic fluorescence shows sharp spatial features offering resolution below one nanometer using spatially shaped pump and probe beams.
The Rochester Conferences on Coherence and Quantum Optics and the Quantum Information and Measurement meeting, 2013
We present methods for optical excitation of coherent superpositions of vortices in Bose-Einstein... more We present methods for optical excitation of coherent superpositions of vortices in Bose-Einstein Condensates through coupling with orbital angular momentum of light. We discussion applications to quantum information, gyroscopy and generation of Schrodinger Cat states.
Frontiers in Optics 2009/Laser Science XXV/Fall 2009 OSA Optics & Photonics Technical Digest, 2009
We have theoretically devised and are experimentally implementing schemes for simultaneous measur... more We have theoretically devised and are experimentally implementing schemes for simultaneous measurement of polarization and orbital angular momentum (OAM) of light with the aim of understanding light carrying OAM emitted by rapidly rotating astrophysical objects.
We present a coherent population trapping based scheme to attain sub-nanoscale resolution for ato... more We present a coherent population trapping based scheme to attain sub-nanoscale resolution for atom localization, microscopy and lithography. Our method uses three-level atoms coupled to amplitude modulated probe field and spatially dependent drive field. The modulation of the probe field allows us to tap into the steep dispersion normally associated with electromagnetically induced transparency and offers an avenue to attain sub-nanometer resolution using just optical fields. We illustrate application of the techniques to the area of microscopy and lithography and show how multilevel schemes offer the possibility of improving resolution further.
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Papers by Kishor Kapale