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- Homi Bhabha National InstituteIN282 papers
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50 papers · 1 filter
Transport through quasi-ballistic quantum wires: the role of contacts
Siddhartha Lal, Sumathi Rao, Diptiman Sen
We model one-dimensional transport through each open channel of a quantum wire by a Luttinger liquid with three different interaction parameters for the leads, the contact regions…
String Field Theory Around the Tachyon Vacuum
Leonardo Rastelli, Ashoke Sen, Barton Zwiebach
Assuming that around the tachyon vacuum the kinetic term of cubic open string field theory is made purely of ghost operators we are led to gauge invariant actions which manifestly…
B-physics constraints on baryon number violating couplings: grand unification or R-parity violation
Debrupa Chakraverty, Debajyoti Choudhury
We investigate the role that baryon number violating interactions may play in phenomenology. Present in various grand unified theories, supersymmetric theories with R-parity vi…
Supergravity couplings to Noncommutative Branes, Open Wilson Lines and Generalised Star Products
S. R. Das, S. P. Trivedi
Noncommutative gauge theories can be constructed from ordinary gauge theories in lower dimensions. Using this construction we identify the operators on noncommutative D…
Cosmic Microwave Background Polarization Signals from Tangled Magnetic Fields
T. R. Seshadri, Kandaswamy Subramanian
Tangled, primordial cosmic magnetic fields create small rotational velocity perturbations on the last scattering surface (LSS) of the cosmic microwave background radiation (CMBR).…
Toric Varieties in Hilbert Schemes
Heather Russell
For an arbitrary field K, let I be an ideal in the ring K[[x,y]] expressible as a polynomial in either the pair of ideals (x, y^4) and (x,y) or the pair (x,y^3) and (x^2, y). Let G…