Publications (41)
Classical and quantum machine learning applications in spintronics
Kumar Ghosh, Sumit Ghosh
In this article we demonstrate the applications of classical and quantum machine learning in quantum transport and spintronics. With the help of a two-terminal device with magnetic…
Extension of Standard Model: A Sub-GeV Dark Matter Model
Bhaskar Dutta, Sumit Ghosh, Jason Kumar
We present a model based on a extension of the Standard Model. The model addresses the mass hierarchy between the third generation and the first two generation fermion…
Probing an MeV-Scale Scalar Boson in Association with a TeV-Scale Top-Quark Partner at the LHC
Bhaskar Dutta, Sumit Ghosh, Alfredo Gurrola +3
Searches for new low-mass matter and mediator particles have actively been pursued at fixed target experiments and at colliders. It is challenging at the CERN LHC, but the…
Sensitivity to Dark Sector Scales from Gravitational Wave Signatures
James B. Dent, Bhaskar Dutta, Sumit Ghosh +2
We consider gravitational wave signals produced by a first-order phase transition in a theory with a generic renormalizable thermal effective potential of power law form. We find t…
Explaining the XENON1T excess with Luminous Dark Matter
Nicole F. Bell, James B. Dent, Bhaskar Dutta +3
We show that the excess in electron recoil events seen by the XENON1T experiment can be explained by relatively low-mass Luminous Dark Matter candidate. The dark matter scatters in…
Unified topological characterization of electronic states in spin textures from noncommutative K-theory
Fabian R. Lux, Sumit Ghosh, Pascal Prass +2
The nontrivial topology of spin systems such as skyrmions in real space can promote complex electronic states. Here, we provide a general viewpoint at the emergence of topological…
Ultrafast optical generation of antiferromagnetic meron-antimeron pairs with conservation of topological charge
Sumit Ghosh, Stefan Blügel, Yuriy Mokrousov
We propose a new mechanism to produce a meron-antimeron pair in a two dimensional antiferromagnet with an ultrafast laser pulse via thermal Schwinger mechanism. Unlike ultrafast sk…
Charge and spin density waves: Quasi one dimension to two dimension
Urbashi Satpathi, Sumit Ghosh, A. K. Ray +1
Possibility of electronic charge and spin separation leading to charge density wave and spin density wave is well established in one dimensional systems in presence and absence of…
New type of phase transition in Reissner Nordström - AdS black hole and its thermodynamic geometry
Rabin Banerjee, Sumit Ghosh, Dibakar Roychowdhury
The phase transition of a RN-AdS black hole is studied in details using Ehrenfest's equations. There is no discontinuity in entropy which signals a lack of any first order phase tr…
Current-driven magnetic resistance in van der Waals spin-filter antiferromagnetic tunnel junctions with MnBiTe
Lishu Zhang, Hui Li, Yanyan Jiang +3
The field of 2D magnetic materials has paved the way for the development of spintronics and nanodevices with new functionalities. Utilizing antiferromagnetic materials, in addition…
Explaining and using the light mediators of
Bhaskar Dutta, Sumit Ghosh, Peisi Huang +1
Scenarios in which right-handed light Standard Model fermions couple to a new gauge group, can naturally generate a sub-GeV dark matter candidate. But such models nece…
and the ANITA anomalous events in a three-loop neutrino mass model
Mohammad Abdullah, Bhaskar Dutta, Sumit Ghosh +1
The most recent measurement of the fine structure constant leads to a 2.4 deviation in the electron anomalous magnetic moment -2, while the muon anomalous magnetic mome…
Spin Orbit Torque in two dimensional Antiferromagnetic Topological Insulators
Sumit Ghosh, Aurelien Manchon
We investigate spin transport in two dimensional ferromagnetic (FTI) and antiferromagnetic (AFTI) topological insulators. In presence of an in plane magnetization AFTI supports zer…
Spin-orbit torque in 3D topological insulator-ferromagnet heterostructure: crossover between bulk and surface transport
Sumit Ghosh, Aurelien Manchon
Current-driven spin-orbit torques are investigated in a heterostructure composed of a ferromagnet deposited on top of a three dimensional topological insulator using the linear res…
Contributions to from the dark photon of
Bhaskar Dutta, Sumit Ghosh, Jason Kumar
We consider the effect on early Universe cosmology of the dark photon associated with the gauging of , a symmetry group under which only right-handed Standard Model fer…
Signature of topological transition in persistent current in a Dirac Ring
Sumit Ghosh, Aurelien Manchon
We study the persistent current in a one dimensional Dirac ring and show that the change of spin current with respect to an applied perpendicular electric field can be used to iden…
Generalised Uncertainty Principle, Remnant Mass and Singularity Problem in Black Hole Thermodynamics
Rabin Banerjee, Sumit Ghosh
We have derived a new Generalised Uncertainty Principle (GUP) based on certain general assumptions. This GUP is consistent with predictions from string theory. It is then used to s…
Lifting spin degeneracy in rhombohedral trilayer graphene for high magnetoresistance applications
Lishu Zhang, Jun Zhou, Jie Yang +4
Many exotic properties in rhombohedral (or ABC-stacked) multilayer graphene have recently been reported experimentally. In this Letter, we first reveal the underlying mechanism of…
Low-mass inelastic dark matter direct detection via the Migdal effect
Nicole F. Bell, James B. Dent, Bhaskar Dutta +3
We consider searches for the inelastic scattering of low-mass dark matter at direct detection experiments, using the Migdal effect. We find that there are degeneracies between the…
Chirality-induced spin selectivity without intrinsic spin-orbit coupling: Role of current-induced molecular orbital moment
Sumit Ghosh, Angela Wittmann, Frank Matthes +1
The microscopic origin of the chirality-induced spin selectivity (CISS) in helical molecules remains an open question. Recent experiments suggest that a significant contribution to…
Induced Spin-texture at 3 Transition Metal/Topological Insulator Interfaces
Slimane Laref, Sumit Ghosh, Evgeny Y. Tsymbal +1
While some of the most elegant applications of topological insulators, such as quantum anomalous Hall effect, require the preservation of Dirac surface states in the presence of ti…
Non-equilibrium spin density and spin-orbit torque in three dimensional topological insulators - antiferromagnet heterostructure
Sumit Ghosh, Aurelien Manchon
We study the behavior of non-equilibrium spin density and spin-orbit torque in a topological insulator - antiferromagnet heterostructure. Unlike ferromagnetic heterostructures wher…
Three-loop neutrino masses via new massive gauge bosons from GUT
Bhaskar Dutta, Sumit Ghosh, Ilia Gogoladze +1
We propose an model arising from grand unified theory. We show that the tiny neutrino masses in this model can be generat…
Explaining ATOMKI, , and MiniBooNE anomalies with light mediators in extended model
Sumit Ghosh, Pyungwon Ko
We consider extensions of Type-I 2HDM plus a singlet scalar , introducing a new Higgs doublet and a singlet charged under . The SM Higgs doublet…
Microscopic origin of scalar potential induced topological transition in massive Dirac fermions and scalar Hall effect
Sumit Ghosh, Yuriy Mokrousov, Stefan Blügel
We present a systematic study of scalar potential induced topological transition in massive Dirac fermions. We show how a distribution of scalar potential can manipulate the signat…
Non-standard neutrino interactions mediated by a light scalar at DUNE
Bhaskar Dutta, Sumit Ghosh, Kevin J. Kelly +3
We investigate the effect on neutrino oscillations generated by beyond-the-standard-model interactions between neutrinos and matter. Specifically, we focus on scalar-mediated non-s…
Exploring exotic configurations with anomalous features using deep learning: Application of classical and quantum-classical hybrid anomaly detection
Kumar J. B. Ghosh, Sumit Ghosh
In this article we present the application of classical and quantum-classical hybrid anomaly detection schemes to explore exotic configuration with anomalous features. We consider…
Driving spin chirality by electron dynamics in laser-excited antiferromagnets
Sumit Ghosh, Frank Freimuth, Olena Gomonay +2
Optical generation of complex spin textures is one of the most exciting challenges of modern spintronics. Here, we uncover a distinct physical mechanism for imprinting spin chirali…
Explaining , the KOTO anomaly and the MiniBooNE excess in an extended Higgs model with sterile neutrinos
Bhaskar Dutta, Sumit Ghosh, Tianjun Li
We consider a simple extension of the Standard Model (SM) by a complex scalar doublet and a singlet along with three sterile neutrinos. The sterile neutrinos mix with the SM neutri…
Persistent current of relativistic electrons on a Dirac ring in presence of impurities
Sumit Ghosh, Arijit Saha
We study the behavior of persistent current of relativistic electrons on a one dimensional ring in presence of attractive/repulsive scattering potentials. In particular, we investi…
Relativistic fermion on a ring: Energy spectrum and persistent current
Sumit Ghosh
The energy and persistent current spectra for a relativistic fermion on a ring is studied in details. The nonlinear nature of persistent current in relativistic regime and its depe…
Opportunities for probing with light mediators
Bhaskar Dutta, Sumit Ghosh, Jason Kumar
We consider strategies for using new datasets to probe scenarios in which light right-handed SM fermions couple to a new gauge group, . This scenario provides a natural…
A sub-GeV dark matter model
Bhaskar Dutta, Sumit Ghosh, Jason Kumar
We propose an extension of the Standard Model gauge symmetry by the gauge group in order to address the Yukawa coupling hierarchy between the third generation fermions…
Semi-realistic tight-binding model for Dzyaloshinskii-Moriya interaction
Ahmed Hajr, Abdulkarim Hariri, Guilhem Manchon +2
In this work, we discuss the nature of Dzyaloshinskii-Moriya interaction (DMI) in transition metal heterostructures. We first derive the expression of DMI in the small spatial grad…
Generalized Uncertainty Principle, Modified Dispersion Relation and Barrier penetration by a Dirac particle
Sumit Ghosh
We have studied the energy band structure of a Dirac particle in presence of a generalised uncertainty principle (GUP). We start from defining a modified momentum operator and deri…
The Forward Physics Facility at the High-Luminosity LHC
Jonathan L. Feng, Felix Kling, Mary Hall Reno +233
High energy collisions at the High-Luminosity Large Hadron Collider (LHC) produce a large number of particles along the beam collision axis, outside of the acceptance of existing L…
Signature of topological phases in Zitterbewegung
Sumit Ghosh, Aurelien Manchon
We have studied the {\em Zitterbewegung} effect on an infinite two dimensional sheet with honeycomb lattice. By tuning the perpendicular electric field and the magnetization of the…
Gravitational Waves and Cosmological Observables from First-Order Phase Transitions: Thermal Corrections at Low Temperature
Katharena Christy, James B. Dent, Sumit Ghosh +2
We consider the impact on cosmological first-order phase transitions (FOPTs) of low-temperature thermal corrections to the effective potential. These are corrections from degrees o…
Non-standard neutrino interactions in light mediator models at reactor experiments
Bhaskar Dutta, Sumit Ghosh, Tianjun Li +2
Compared to other neutrino sources, the huge anti-neutrino fluxes at nuclear reactor based experiments empower us to derive stronger bounds on non-standard interactions of neutrino…
Linked skyrmions in shifted magnetic bilayer
Sumit Ghosh, Hiroshi Katsumoto, Gustav Bihlmayer +6
Magnetic solitons have recently attracted significant attention due to their intricate physical properties and potential applications in information processing. The majority of the…
Cosmic-ray upscattered inelastic dark matter
Nicole F. Bell, James B. Dent, Bhaskar Dutta +4
Light non-relativistic components of the galactic dark matter halo elude direct detection constraints because they lack the kinetic energy to create an observable recoil. However,…