112 citations · 660 across the 25 of their papers we have counts for
25 papers
Dephasing Enabled Fast Charging of Quantum Batteries
Rahul Shastri, Chao Jiang, Guo-Hua Xu +2
We propose and analyze a universal method to obtain fast charging of a quantum battery by a driven charger system using controlled, pure dephasing of the charger. While the battery…
Controlling Work Output and Coherence in Finite Time Quantum Otto Engines Through Monitoring
Rahul Shastri, B. Prasanna Venkatesh
We examine the role of diagnostic quantum measurements on the work statistics of a finite-time quantum Otto heat engine operated in the steady-state. We consider three pointer-base…
Study of bounds on non-equilibrium fluctuations for asymmetrically driven quantum Otto engine
Sandipan Mohanta, Madhumita Saha, B. Prasanna Venkatesh +1
For a four-stroke asymmetrically driven quantum Otto engine with working medium modeled by a single qubit, we study the bounds on non-equilibrium fluctuations of work and heat. We…
Crystalline Phases of Laser-Driven Dipolar Bose-Einstein Condensates
Chinmayee Mishra, Stefan Ostermann, Farokh Mivehvar +1
Although crystallization is a ubiquitous phenomenon in nature, crystal formation and melting still remain fascinating processes with several open questions yet to be addressed. In…
Optimization of Asymmetric Quantum Otto Engine Cycles
Rahul Shastri, B. Prasanna Venkatesh
We consider the optimization of the work output and fluctuations of a finite-time quantum Otto heat engine cycle consisting of compression and expansion work strokes of unequal dur…
Quantum transport in quasi-periodic lattice systems in presence of Büttiker probes
Madhumita Saha, B. Prasanna Venkatesh, Bijay Kumar Agarwalla
Quasi-periodic lattice systems offer diverse transport properties. In this work, we investigate the environment induced effects on transport properties for quasi-periodic systems,…
Two-stroke Quantum Measurement Heat Engine
M. Sahnawaz Alam, B. Prasanna Venkatesh
We propose and analyze the theoretical model for a two-stroke quantum heat engine with one of the heat baths replaced by a non-selective quantum measurement. We show that the engin…
Read-out of Quasi-periodic Systems using Qubits
Madhumita Saha, Bijay Kumar Agarwalla, B. Prasanna Venkatesh
We develop a theoretical scheme to perform a read-out of the properties of a quasi-periodic system by coupling it to one or two qubits. We show that the decoherence dynamics of a s…
Quantum Statistical Enhancement of the Collective Performance of Multiple Bosonic Engines
Gentaro Watanabe, B. Prasanna Venkatesh, Peter Talkner +2
We consider an ensemble of indistinguishable quantum machines and show that quantum statistical effects can give rise to a genuine quantum enhancement of the collective thermodynam…
Generalized energy measurements and quantum work compatible with fluctuation theorems
Kosuke Ito, Peter Talkner, B. Prasanna Venkatesh +1
The probability densities of work that can be exerted on a quantum system initially staying in thermal equilibrium are constrained by the fluctuation relations of Jarzynski and Cro…
Collective effects in Casimir-Polder forces
Kanupriya Sinha, B. Prasanna Venkatesh, Pierre Meystre
We study cooperative phenomena in the fluctuation-induced forces between a surface and a system of neutral two-level quantum emitters prepared in a coherent collective state, showi…
Bistability in a Mesoscopic Josephson Junction Array Resonator
P. R. Muppalla, O. Gargiulo, S. I. Mirzaei +5
We present an experimental investigation of stochastic switching of a bistable Josephson junctions array resonator with a resonance frequency in the GHz range. As the device is in…
Quantum Performance of Thermal Machines over Many Cycles
Gentaro Watanabe, B. Prasanna Venkatesh, Peter Talkner +1
The performance of quantum heat engines is generally based on the analysis of a single cycle. We challenge this approach by showing that the total work performed by a quantum engin…
Non-destructive monitoring of Bloch oscillations in an optical cavity
H. Keßler, J. Klinder, B. P. Venkatesh +2
Bloch oscillations are a hallmark of coherent wave dynamics in periodic potentials. They occur as the response of quantum mechanical particles in a lattice if a weak force is appli…
Nonlinear Phenomena of Ultracold Atomic Gases in Optical Lattices: Emergence of Novel Features in Extended States
Gentaro Watanabe, B. Prasanna Venkatesh, Raka Dasgupta
The system of a cold atomic gas in an optical lattice is governed by two factors: nonlinearity originating from the interparticle interaction, and the periodicity of the system set…
Attraction-induced dynamical stability of a Bose-Einstein condensate in a nonlinear lattice
Raka Dasgupta, B. Prasanna Venkatesh, Gentaro Watanabe
We study multiple-period Bloch states of a Bose-Einstein condensate with spatially periodic interactomic interaction. Solving the Gross-Pitaevskii equation for the continuum model,…
On-chip quantum interference of a superconducting microsphere
H. Pino, J. Prat-Camps, K. Sinha +2
We propose and analyze an all-magnetic scheme to perform a Young's double slit experiment with a micron-sized superconducting sphere of mass amu. We show that i…
An optomechanical elevator: Transport of a Bloch oscillating Bose-Einstein condensate up and down an optical lattice by cavity sideband amplification and cooling
B. Prasanna Venkatesh, D. H. J. O'Dell, J. Goldwin
We analyze the optomechanics of an atomic Bose-Einstein condensate interacting with the optical lattice inside a laser-pumped optical cavity and subject to a uniform bias force suc…
Emergent Universality in Nonequilibrium Processes of Critical Systems
Danh-Tai Hoang, B. Prasanna Venkatesh, Seungju Han +3
We examine the Jarzynski equality for a quenching process across the critical point of second-order phase transitions, where absolute irreversibility and the effect of finite-sampl…
Backaction-Driven Transport of Bloch Oscillating Atoms in Ring Cavities
J. Goldwin, B. Prasanna Venkatesh, D. H. J. O'Dell
We predict that an atomic Bose-Einstein condensate strongly coupled to an intracavity optical lattice can undergo resonant tunneling and directed transport when a constant and unif…
Quantum fluctuation theorems and generalized measurements during the force protocol
Gentaro Watanabe, B. Prasanna Venkatesh, Peter Talkner +2
Generalized measurements of an observable performed on a quantum system during a force protocol are investigated and conditions that guarantee the validity of the Jarzynski equalit…
Transient quantum fluctuation theorems and generalized measurements
B. Prasanna Venkatesh, Gentaro Watanabe, Peter Talkner
The transient quantum fluctuation theorems of Crooks and Jarzynski restrict and relate the statistics of work performed in forward and backward forcing protocols. So far these theo…
Bloch Oscillations of Cold Atoms in a Cavity: Effects of Quantum Noise
B. Prasanna Venkatesh, D. H. J. O'Dell
We extend our theory of Bloch oscillations of cold atoms inside an optical cavity [ Venkatesh et al. Phys. Rev. A 80 063834 (2009)] to include the effects of quantum noise arising…
Band structure loops and multistability in cavity-QED
B. Prasanna Venkatesh, J. Larson, D. H. J. O'Dell
We calculate the band structure of ultracold atoms located inside a laser-driven optical cavity. For parameters where the atom-cavity system exhibits bistability, the atomic band s…