16 citations · 36 across the 13 of their papers we have counts for
13 papers
Markovian dissipation can stabilize a (localization) quantum phase transition
Naushad A. Kamar, Mostafa Ali, Mohammad Maghrebi
Quantum phase transitions are a cornerstone of many-body physics at low temperatures but have remained elusive far from equilibrium. Driven open quantum systems -- a prominent non-…
Entanglement, information and non-equilibrium phase transitions in long-range open quantum Ising chains
Daniel A. Paz, Benjamin E. Maves, Naushad A. Kamar +2
Non-equilibrium phase transitions of open quantum systems generically exhibit diverging classical but not quantum correlations. Still entanglement -- characterizing the latter corr…
Signatures of Quantum Phase Transitions in Driven Dissipative Spin Chains
Mostafa Ali, Naushad A. Kamar, Alireza Seif +1
Open driven quantum systems have defined a powerful paradigm of nonequilibrium phases and phase transitions; however, quantum phase transitions are generically not expected in this…
Probing non-equilibrium dissipative phase transitions with trapped-ion quantum simulators
Casey Haack, Naushad Ahmad Kamar, Daniel Paz +2
Open quantum many-body systems with controllable dissipation can exhibit novel features in their dynamics and steady states. A paradigmatic example is the dissipative transverse fi…
Mobile Impurity in a Two-Leg Bosonic Ladder
Naushad Ahmad Kamar, Adrian Kantian, Thierry Giamarchi
We study the dynamics of a mobile impurity in a two-leg bosonic ladder. The impurity moves both along and across the legs and interacts with a bath of interacting bosonic particles…
Hybrid Quantum-Classical Stochastic Approach to Spin-Boson Models
Naushad A. Kamar, Mohammad Maghrebi
Interacting spin-boson models encompass a large class of physical systems, spanning models with a single spin interacting with a bosonic bath -- a paradigm of quantum impurity prob…
Splitting the local Hilbert space: MPS-based approach to large local dimensions
Naushad Ahmad Kamar, Mohammad Maghrebi
A large, or even infinite, local Hilbert space dimension poses a significant computational challenge for simulating quantum systems. In this work, we present a matrix product state…
Spin-boson model under dephasing: Markovian vs Non-Markovian dynamics
Naushad Ahmad Kamar, Daniel A. Paz, Mohammad F. Maghrebi
The spin-boson model, describing a two-level system strongly coupled to a bosonic bath, is extensively studied as a paradigmatic dissipative quantum system, exhibiting rich dynamic…
Dynamics of a Mobile Impurity in a Two Leg Bosonic Ladder
Naushad Ahmad Kamar, Adrian Kantian, Thierry Giamarchi
We have analyzed the behavior of a mobile quantum impurity in a bath formed by a two-leg bosonic ladder by a combination of field theory (Tomonaga-Luttinger liquid) and numerical (…
Time dependent local potential in a Tomonaga-Luttinger liquid
Naushad Ahmad Kamar, Thierry Giamarchi
We study the energy deposition in a one dimensional interacting quantum system with a point like potential modulated in amplitude. The point like potential at position has a…
Random local attraction driven metal-superconductor transitions
Naushad Ahmad Kamar, N. S. Vidhyadhiraja
In this paper, we investigate the disordered attractive Hubbard model by combining dynamical mean field theory, coherent potential approximation and iterated perturbation theory fo…
Proximity effects in a superconductor-normal metal bilayer system
Naushad Ahmad Kamar, N. S. Vidhyadhiraja
In this letter, we have studied the effects of proximity of a superconductor to a normal metal. The system, represented by a bilayer attractive Hubbard model, is investigated using…
Site-disorder driven superconductor-insulator transition: A dynamical mean field study
Naushad Ahmad Kamar, N. S. Vidhyadhiraja
We investigate the effect of site-disorder on the superconducting (SC) state in the attractive Hubbard model within the framework of dynamical mean field theory. For a fixed intera…