Shelender Kumar
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View article: High-power readout of a transmon qubit using a nonlinear coupling
High-power readout of a transmon qubit using a nonlinear coupling Open
The field of superconducting qubits is constantly evolving with new circuit designs. However, when it comes to qubit readout, the use of simple transverse linear coupling remains overwhelmingly prevalent. This standard readout scheme has s…
View article: Using Bifluxon Tunneling to Protect the Fluxonium Qubit
Using Bifluxon Tunneling to Protect the Fluxonium Qubit Open
Encoding quantum information in quantum states with disjoint wave-function support and noise-insensitive energies is the key behind the idea of qubit protection. While fully protected qubits are expected to offer exponential protection aga…
View article: Engineering Surface Oxygen Vacancies in $\mathrm{SrTiO_3}$ to Form a High Mobility and Transparent Quasi Two dimensional Electron System
Engineering Surface Oxygen Vacancies in $\mathrm{SrTiO_3}$ to Form a High Mobility and Transparent Quasi Two dimensional Electron System Open
Quasi-two-dimensional electron systems (q-2DES) are formed in various hetero-structures, including oxide interfaces. Oxygen vacancies (OVs) in oxides like $\mathrm{SrTiO_3}$ are known to produce electronic carriers. A novel way to produce …
View article: Low temperature dissipation studies in normal and superconducting electromechanical systems
Low temperature dissipation studies in normal and superconducting electromechanical systems Open
This thesis deals with the study of linear and nonlinear dissipation at very low temperatures in superconducting and metallic electromechanical resonators. The understanding of dissipation is at the very heart of the condensed matter. It i…
View article: Temperature-Dependent Nonlinear Damping in Palladium Nanomechanical Resonators
Temperature-Dependent Nonlinear Damping in Palladium Nanomechanical Resonators Open
Advances in nanofabrication techniques have made it feasible to observe damping phenomena beyond the linear regime in nanomechanical systems. In this work, we report cubic nonlinear damping in palladium nanomechanical resonators. Nanoscale…
View article: Tunable low-temperature dissipation scenarios in palladium nanomechanical resonators
Tunable low-temperature dissipation scenarios in palladium nanomechanical resonators Open
We study dissipation in Pd nano-mechanical resonators at low temperatures in\nthe linear response regime. Metallic resonators have shown characteristic\nfeatures of dissipation due to tunneling two level systems (TLS). This system\noffers …