56 citations · 346 across the 21 of their papers we have counts for
21 papers
Quantum simulation of the pseudo-Hermitian Landau-Zener-Stückelberg-Majorana effect
Feliks Kivelä, Shruti Dogra, Gheorghe Sorin Paraoanu
While the Hamiltonians used in standard quantum mechanics are Hermitian, it is also possible to extend the theory to non-Hermitian Hamiltonians. Particularly interesting are non-He…
Coherent interaction-free detection of noise
John J. McCord, Shruti Dogra, Gheorghe Sorin Paraoanu
The measurement and characterization of noise is a flourishing area of research in mesoscopic physics. In this work, we propose interaction-free measurements as a noise-detection t…
High-fidelity robust qubit control by phase-modulated pulses
Marko Kuzmanović, Isak Björkman, John J. McCord +2
We present a set of robust and high-fidelity pulses that realize paradigmatic operations such as the transfer of the ground state population into the excited state and arbitrary $X…
Theory of coherent interaction-free detection of pulses
John J. McCord, Shruti Dogra, Gheorghe Sorin Paraoanu
Quantum physics allows an object to be detected even in the absence of photon absorption by the use of so-called interaction-free measurements. We provide a formulation of this pro…
Perfect stimulated Raman adiabatic passage with imperfect finite-time pulses
Shruti Dogra, Gheorghe Sorin Paraoanu
We present a well-tailored sequence of two Gaussian-pulsed drives that achieves perfect population transfer in STImulated Raman Adiabatic Passage (STIRAP). We give a theoretical an…
Coherent interaction-free detection of microwave pulses with a superconducting circuit
Shruti Dogra, John J. McCord, Gheorghe Sorin Paraoanu
The interaction-free measurement is a fundamental quantum effect whereby the presence of a photosensitive object is determined without irreversible photon absorption. Here we propo…
Experimental demonstration of robustness under scaling errors for superadiabatic population transfer in a superconducting circuit
Shruti Dogra, Antti Vepsäläinen, Gheorghe Sorin Paraoanu
We study experimentally and theoretically the transfer of population between the ground state and the second excited state in a transmon circuit by the use of superadiabatic stimul…
Quantum process tomography of adiabatic and superadiabatic stimulated Raman passage
Shruti Dogra, Gheorghe Sorin Paraoanu
Quantum control methods for three-level systems have become recently an important direction of research in quantum information science and technology. Here we present numerical sim…
Quantum simulation of parity-time symmetry breaking with a superconducting quantum processor
Shruti Dogra, Artem A. Melnikov, Gheorghe Sorin Paraoanu
The observation of genuine quantum effects in systems governed by non-Hermitian Hamiltonians has been an outstanding challenge in the field. Here we simulate the evolution under su…
A comparative study of system size dependence of the effect of non-unitary channels on different classes of quantum states
Geetu Narang, Shruti Dogra, Arvind
We investigate the effect of different types of non-unitary quantum channels on multi-qubit quantum systems. For an -qubit system and a particular channel, in order to draw unbi…
Majorana representation of adiabatic and superadiabatic processes in three-level systems
Shruti Dogra, Antti Vepsäläinen, G. S. Paraoanu
We show that stimulated Raman adiabatic passage (STIRAP) and its superadiabatic version (saSTIRAP) have a natural geometric two-star representation on the Majorana sphere. In the c…
Quantum signatures of chaos, thermalization and tunneling in the exactly solvable few body kicked top
Shruti Dogra, Vaibhav Madhok, Arul Lakshminarayan
Exactly solvable models that exhibit quantum signatures of classical chaos are both rare as well as important - more so in view of the fact that the mechanisms for ergodic behavior…
Quantum chaos, thermalization and tunneling in an exactly solvable few body system
Shruti Dogra, Vaibhav Madhok, Arul Lakshminarayan
Exactly solvable models that exhibit quantum signatures of classical chaos are both rare as well as important - more so in view of the fact that the mechanisms for ergodic behavior…
Quantum correlations as probes of chaos and ergodicity
Vaibhav Madhok, Shruti Dogra, Arul Lakshminarayan
Long-time average behavior of quantum correlations in a multi-qubit system, collectively modeled as a kicked top, is addressed here. The behavior of dynamical generation of quantum…
Majorana representation, qutrit Hilbert space and NMR implementation of qutrit gates
Shruti Dogra, Kavita Dorai, Arvind
We report a study of the Majorana geometrical representation of a qutrit, where a pair of points on a unit sphere represents its quantum states. A canonical form for qutrit states…
Superposing pure quantum states with partial prior information
Shruti Dogra, George Thomas, Sibasish Ghosh +1
The principle of superposition is an intriguing feature of Quantum Mechanics, which is regularly exploited at various instances. A recent work [PRL \textbf{116}, 110403 (2016)] sho…
Experimental demonstration of quantum contextuality on an NMR qutrit
Shruti Dogra, Kavita Dorai, Arvind
We experimentally test quantum contextuality of a single qutrit using NMR. The contextuality inequalities based on nine observables developed by Kurzynski et. al. are first reformu…
Experimental construction of a W-superposition state and its equivalence to the GHZ state under local filtration
Debmalya Das, Shruti Dogra, Kavita Dorai +1
We experimentally construct a novel three-qubit entangled W-superposition () state on an NMR quantum information processor. We give a measurement-based filtratio…
Implementation of the quantum Fourier transform on a hybrid qubit-qutrit NMR quantum emulator
Shruti Dogra, Arvind, Kavita Dorai
The quantum Fourier transform (QFT) is a key ingredient of several quantum algorithms and a qudit-specific implementation of the QFT is hence an important step toward the realizati…
Experimental construction of generic three-qubit states and their reconstruction from two-party reduced states on an NMR quantum information processor
Shruti Dogra, Kavita Dorai, Arvind
We experimentally explore the state space of three qubits on an NMR quantum information processor. We construct a scheme to experimentally realize a canonical form for general thre…
Determining the parity of a permutation using an experimental NMR qutrit
Shruti Dogra, Arvind, Kavita Dorai
We present the NMR implementation of a recently proposed quantum algorithm to find the parity of a permutation. In the usual qubit model of quantum computation, speedup requires th…