23 citations · 85 across the 20 of their papers we have counts for
18 papers · 1 filter
Directional pumping of a two-level system by a fluctuation-regulated quantum source
Sarfraj Fency, Rangeet Bhattacharyya
A resonant classical field drives a two-level system coherently and, with ordinary relaxation, produces saturation rather than directional population transfer. Here we show that di…
Optimal enhancement of the Overhauser and Solid Effects within a unified framework
Sarfraj Fency, Rangeet Bhattacharyya
The Overhauser effect (OE) and the Solid effect (SE) are two Dynamic Nuclear Polarization techniques. These two-spin techniques are widely used to create nonequilibrium nuclear spi…
Discrete Time Crystals in Noninteracting Dissipative Systems
Gourab Das, Saptarshi Saha, Rangeet Bhattacharyya
Many-body quantum systems, under suitable conditions, exhibit time-translation symmetry breaking and settle in a discrete time crystalline (DTC) phase -- an out-of-equilibrium quan…
Determination of Fluctuation correlation time in solid-state Nuclear Magnetic Resonance
Saptarshi Saha, Rangeet Bhattacharyya
Solid-state NMR provides a wide variety of experimental techniques to detect and analyze a material's chemical and physical environment. Here, we offer a theoretical demonstration…
Emergence of superradiance in dissipative dipolar-coupled spin systems
Saptarshi Saha, Yeshma Ibrahim, Rangeet Bhattacharyya
In the superradiance phenomenon, a collection of non-interacting atoms exhibits collective dissipation due to interaction with a common radiation field, resulting in a non-monotoni…
Prethermalization in an open quantum system coupled to a spatially correlated Bosonic bath
Saptarshi Saha, Rangeet Bhattacharyya
A nearly-integrable isolated quantum many-body system reaches a quasi-stationary prethermal state before a late thermalization. Here, we revisit a particular example in the setting…