173 citations · 436 across the 13 of their papers we have counts for
14 papers
The quantromon: A qubit-resonator system with orthogonal qubit and readout modes
Kishor V. Salunkhe, Suman Kundu, Srijita Das +3
The measurement of a superconducting qubit is implemented by coupling it to a resonator. The common choice is transverse coupling, which, in the dispersive approximation, introduce…
Unimon qubit
Eric Hyyppä, Suman Kundu, Chun Fai Chan +22
Superconducting qubits are one of the most promising candidates to implement quantum computers. The superiority of superconducting quantum computers over any classical device in si…
Microwave response of a metallic superconductor subject to a high-voltage gate electrode
Giacomo Catto, Wei Liu, Suman Kundu +3
Processes that lead to the critical-current suppression and change of impedance of a superconductor under the application of an external voltage is an active area of research, espe…
Bounds on Regge growth of flat space scattering from bounds on chaos
Deeksha Chandorkar, Subham Dutta Chowdhury, Suman Kundu +1
We study four-point functions of scalars, conserved currents, and stress tensors in a conformal field theory, generated by a local contact term in the bulk dual description, in two…
Engineering Cross Resonance Interaction in Multi-modal Quantum Circuits
Sumeru Hazra, Kishor V. Salunkhe, Anirban Bhattacharjee +5
Existing scalable superconducting quantum processors have only nearest-neighbor coupling. This leads to reduced circuit depth, requiring large series of gates to perform an arbitra…
Multiplexed readout of four qubits in 3D cQED architecture using broadband JPA
Suman Kundu, Nicolas Gheeraert, Sumeru Hazra +4
We propose and demonstrate a frequency-multiplexed readout scheme in 3D cQED architecture. We use four transmon qubits coupled to individual rectangular cavities which are aperture…
A programmable three-qubit superconducting processor with all-to-all connectivity
Tanay Roy, Sumeru Hazra, Suman Kundu +3
Superconducting circuits are at the forefront of quantum computing technology because of the unparalleled combination of good coherence, fast gates and flexibility in design parame…
Large D gravity and charged membrane dynamics with nonzero cosmological constant
Suman Kundu, Poulami Nandi
In this paper, we have found a class of dynamical charged 'black-hole' solutions to Einstein-Maxwell system with a non-zero cosmological constant in a large number of spacetime dim…
Quantum Trajectory Distribution for Weak Measurement of a Superconducting Qubit: Experiment meets Theory
Parveen Kumar, Suman Kundu, Madhavi Chand +2
Quantum measurements are described as instantaneous projections in textbooks. They can be stretched out in time using weak measurements, whereby one can observe the evolution of a…
An Action for and Hydrodynamics from the improved Large D membrane
Yogesh Dandekar, Suman Kundu, Subhajit Mazumdar +3
It has recently been demonstrated that black hole dynamics at large D is dual to the motion of a probe membrane propagating in the background of a spacetime that solves Einstein's…
Multi-mode superconducting circuits for realizing strongly coupled multi-qubit processor units
Tanay Roy, Madhavi Chand, Anirban Bhattacharjee +4
Inter-qubit coupling and qubit connectivity in a processor are crucial for achieving high fidelity multi-qubit gates and efficient implementation of quantum algorithms. Typical sup…
Implementation of pairwise longitudinal coupling in a three-qubit superconducting circuit
Tanay Roy, Suman Kundu, Madhavi Chand +7
We present the "trimon", a multi-mode superconducting circuit implementing three qubits with all-to-all longitudinal coupling. This always-on interaction enables simple implementat…
A two-fold quantum delayed-choice experiment in a superconducting circuit
K. Liu, Y. Xu, W. Wang +9
We propose and experimentally demonstrate a two-fold quantum delayed-choice experiment where wave or particle nature of a superconducting interfering device can be post-selected tw…
Broadband parametric amplification with impedance engineering: Beyond the gain-bandwidth product
Tanay Roy, Suman Kundu, Madhavi Chand +7
We present an impedance engineered Josephson parametric amplifier capable of providing bandwidth beyond the traditional gain-bandwidth product. We achieve this by introducing a pos…