Browsing Prof. Dipankar Home by Issue Date
Now showing items 1-18 of 18
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Information transfer and non-locality for a tripartite entanglement using dynamics
(ELSEVIER SCIENCE BV, 2004-12-13)Without any classical channels, quantum information can be transferred using an entangled tripartite system with nonorthogonal states. We give a specific dynamical model for the preparation of such an entangled tripartite ... -
Testing quantum statistics with particles in distinguishable states
(WORLD SCIENTIFIC PUBL CO PTE LTD, 2005-03-01)In this paper, we describe how it is possible to verify the quantum statistics of identical particles prepared in distinguishable internal states without ever bringing these particles to the same internal state. Examples ... -
Quantum superarrivals: Bohr's wave-particle duality revisted
(SPRINGER/PLENUM PUBLISHERS, 2006-04-01)The phenomenon of quantum superarrivals is manifested in the probabilities for Schrodinger wave packets scattered from perturbed potential barriers. We argue that both classical wave-like and classical particle-like ... -
Observability of the arrival time distribution using spin-rotator as a quantum clock
(ELSEVIER SCIENCE BV, 2006-04-03)An experimentally realizable scheme is formulated which can test any postulated quantum mechanical approach for calculating the arrival time distribution. This is specifically illustrated by using the modulus of the ... -
On the quantum analogue of Galileo's leaning tower experiment
(IOP PUBLISHING LTD, 2006-11-21)The quantum analogue of Galileo's leaning tower experiment is revisited using wave packets evolving under the gravitational potential. We first calculate the position detection probabilities for particles projected upwards ... -
Quantum time-of-flight distribution for cold trapped atoms
(AMERICAN PHYSICAL SOC, 2007-04-01)The time-of-flight distribution for a cloud of cold atoms falling freely under gravity is considered. We generalize the probability current density approach to calculate the quantum arrival time distribution for the mixed ... -
Aspects of nonideal Stern-Gerlach experiment and testable ramifications
(IOP PUBLISHING LTD, 2007-11-16)We critically examine the quantum-mechanical modelling of a measurement process using the Stern-Gerlach (SG) setup in the most general context, probing in particular for nonideal situations, the subtleties involved in the ... -
Reply to "comment on 'Quantum time-of-flight distribution for cold trapped atomsa'"
(AMER PHYSICAL SOC, 2008-02-22)In their comment Gomes [Phys. Rev. A 77, 026101 (2008)] have questioned the possibility of empirically testable differences existing between the semiclassical time of flight distribution for cold trapped atoms and a quantum ... -
J. C. BOSE’S DOUBLE-PRISM EXPERIMENT USING SINGLE PHOTON STATES VIS-A-VIS WAVE-PARTICLE DUALITY
(Indian Science News Association, 2008-11-01)We discuss in this article the significance of the double-prism experiment J. C. Bose had performed in 1897 in order to verify the wave-like nature of electromagnetic radiation, using the phenomenon of optical tunneling ... -
Using the no-signaling condition for constraining the nonidealness of a Stern-Gerlach set-up
(IOP PUBLISHING LTD, 2009-02-27)On the basis of a variant of the EPR-Bohm example, we show that the no-signaling condition can be employed as a useful tool for deriving a constraint on a suitably defined measure of the 'nonidealness' of a Stern-Gerlach ... -
Quantitative probing of the quantum-classical transition for the arrival time distribution
(IOP PUBLISHING LTD, 2009-04-24)The classical limit problem of quantum mechanics is revisited on the basis of a scheme that enables a quantitative study of the way the quantum-classical agreement emerges while going through the intermediate mass range ... -
Dark energy from quantum wave function collapse of dark matter
(ELSEVIER SCIENCE BV, 2009-08-24)Dynamical wave function collapse models entail the continuous liberation of a specified rate of energy arising from the interaction of a fluctuating scalar field with the matter wave function. We consider the wave function ... -
Contextuality within quantum mechanics manifested in subensemble mean values
(ELSEVIER SCIENCE BV, 2009-09-14)For spin-1/2 particles, using a suitable Mach-Zehnder-type setup with a spin-flipper, we argue that it is a direct consequence of the quantum mechanical treatment that an experimentally verifiable subensemble mean of the ... -
Swapping path-spin intraparticle entanglement onto spin-spin interparticle entanglement
(EPL ASSOCIATION, 2010-01-01)Based on a scheme that produces an entanglement between the spin and the path variables of a single spin-(1/2) particle (qubit) using a beam-splitter and a spin-flipper, we formulate a procedure for transferring this ... -
Information transfer using a single particle path-spin hybrid entangled state
(ELSEVIER SCIENCE BV, 2010-02-15)he path-spin entangled state of a single spin-1/2 particle is considered which is generated by using a beam-spitter and a spin-flipper. Using this hybrid entanglement at the level of a single particle as a resource, we ... -
Reply to "Comment on 'Contextuality within quantum mechanics manifested in subensemble mean values' [Phys. Lett. A 373 (2009) 3430]" [Phys. Lett. A 374 (2010) 1397]
(ELSEVIER SCIENCE BV, 2010-04-26)In this reply, we point out that the claim by De Zela (2010) [2] is unjustified because the setup he discusses is not equivalent to the setup analysed in our paper (Pan and Home (2009) [1]). Hence his subsequent argument ... -
On the possibility of empirically probing the Bohmian model in terms of the testability of quantum arrival/transit time distribution
(2010-07-05)The present article focuses on studying the extent to which the nonuniqueness that is inherent in the standard quantum mechanical calculation of arrival/transit time distribution can be exploited to enable an empirical ... -
Quantum mechanical effect of path-polarization Contextuality for a Single Photon
(SPRINGER/PLENUM PUBLISHERS, 2010-08-01)Using measurements pertaining to a suitable Mach-Zehnder (MZ) type setup, a curious quantum mechanical effect of contextuality between the path and the polarization degrees of freedom of a polarized photon is demonstrated, ...