Zobrazeno 1 - 10
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pro vyhledávání: '"Roy, S. M."'
Autor:
Roy, S. M.
The De Broglie-Bohm (DeBB)\cite{DeBB} Causal Quantum Mechanics played a crucial role in Bell's discovery \cite{Bell1964} that quantum mechanics violates EPR local reality \cite{EPR1935}, and also in Bell's search for an exact quantum mechanics. The e
Externí odkaz:
http://arxiv.org/abs/2301.00119
Autor:
Roy, S. M.
I derive separability inequalities for Bell correlations of observables in arbitrary pure or mixed $N$ Qudit states in $D^N$-dimensional state space. I find states (a continuum of states if $D>3$) including maximally entangled states which violate th
Externí odkaz:
http://arxiv.org/abs/2001.11687
Monitoring photon quadratures and free masses are useful tools to detect small disturbances such as gravitational waves.Here we report a large class of states for photon quadratures and free masses potentially useful for this purpose: (1)'generic coh
Externí odkaz:
http://arxiv.org/abs/1903.11845
Autor:
Roy, S. M.
Banaszek, W\'odkiewicz and others (\cite{Banaszek},\cite{Chen},\cite{Chen-Zhang}) made the surprising discovery that Einstein-Bell locality inequalities can be violated by the two mode squeezed vacuum by a factor $\sqrt{2}$, in spite of the fact that
Externí odkaz:
http://arxiv.org/abs/1807.02762
Autor:
Roy, S. M.
Publikováno v:
Phys. Rev. A 97, 032108 (2018)
There are heuristic arguments proposing that the accuracy of monitoring position of a free mass $m$ is limited by the standard quantum limit (SQL):$\sigma^2 (X(t)) \geq \sigma^2 (X(0)) +(t^2/m^2) \sigma^2 (P(0))\geq \hbar t/m$, where $\sigma^2 (X(t))
Externí odkaz:
http://arxiv.org/abs/1711.10261
Autor:
Martin, André, Roy, S. M.
Publikováno v:
Phys. Rev. D 96, 114014 (2017)
Assuming that the pion-pion scattering amplitude and its absorptive part are analytic inside an ellipse in $t$- plane with foci $t=0$, $u=0$ and right extremity $t=4 m_{\pi}^2 +\epsilon $, ($\epsilon > 0$), except for cuts prescribed by Mandelstam re
Externí odkaz:
http://arxiv.org/abs/1710.07140
Autor:
Sahu, Subhayan, Roy, S. M.
Publikováno v:
Eur. Phys. J. D (2018) 72: 211
We study entanglement generation between a system qubit and three apparatus qubits using an exactly solvable Arthurs-Kelly type model. We demonstrate the possibility of generating an EPR-like maximally entangled system-apparatus state, in which the s
Externí odkaz:
http://arxiv.org/abs/1612.03405
Autor:
Roy, S. M.
I propose a two component analytic formula $F(s,t)=F^{(1)}(s,t)+F^{(2)}(s,t)$ for $(ab\rightarrow ab) +(a\bar{b}\rightarrow a\bar{b})$ scattering at energies $\ge 100 GeV$ ,where $s,t$ denote squares of c.m. energy and momentum transfer.It saturates
Externí odkaz:
http://arxiv.org/abs/1602.03627
Autor:
Martin, André, Roy, S. M.
Publikováno v:
Phys. Rev. D 91, 076006 (2015)
Assuming that axiomatic local field theory results hold for hadron scattering, Andr\'e Martin and S. M. Roy recently obtained absolute bounds on the D-wave below threshold for pion-pion scattering and thereby determined the scale of the logarithm in
Externí odkaz:
http://arxiv.org/abs/1503.01261
Teleportation usually involves entangled particles 1,2 shared by Alice and Bob, Bell-state measurement on particle 1 and system particle by Alice, classical communication to Bob, and unitary transformation by Bob on particle 2. We propose a novel met
Externí odkaz:
http://arxiv.org/abs/1308.2852