83 citations · 362 across the 20 of their papers we have counts for
20 papers
Even Odd Splitting of the Gaussian Quantum Fisher Information: From Symplectic Geometry to Metrology
Kaustav Chatterjee, Tanmoy Pandit, Varinder Singh +2
We introduce a canonical decomposition of the quantum Fisher information (QFI) for centered multimode Gaussian states into two additive pieces: an even part that captures changes i…
Violation of kinetic uncertainty relation in maser heat engines: Role of spontaneous emission
Varinder Singh, Euijoon Kwon, Jae Sung Lee
We investigate the kinetic uncertainty relation (KUR)-a fundamental trade-off between dynamical activity and current fluctuations-in two configurations of a maser heat engine. We f…
Relativistic Quantum Otto Engine: Generalized efficiency bounds and frictional effects
Vahid Shaghaghi, Pritam Chattopadhyay, Vijit V. Nautiyal +3
This work investigates a relativistic quantum Otto engine with a harmonic oscillator as its working medium, analyzing how relativistic motion and nonadiabatic driving affect its pe…
Relativistic Quantum Thermal Machine: Harnessing Relativistic Effects to Surpass Carnot Efficiency
Tanmoy Pandit, Pritam Chattopadhyay, Kaustav Chatterjee +1
We investigate a three-level maser quantum thermal machine in which the system-reservoir interaction is modeled via Unruh-DeWitt type coupling, with one or both reservoirs undergoi…
Quantum Thermodynamics on a limit cycle
Varinder Singh, Euijoon Kwon, G J Milburn
We consider a periodic quantum clock based on cooperative resonance fluorescence at zero temperature. In the quantum case, this system has an exact steady state and the limit cycle…
Asymmetric Quantum Harmonic Otto Engine Under Hot Squeezed Thermal Reservoir
Monika, Kirandeep Kaur, Varinder Singh +1
We study a quantum harmonic Otto engine under a hot squeezed thermal reservoir with asymmetry between the two adiabatic branches introduced by considering different speeds of the d…
The asymmetric Otto engine: frictional effects on performance bounds and operational modes
Varinder Singh, Vahid Shaghaghi, Tanmoy Pandit +3
We present a detailed study of an asymmetrically driven quantum Otto engine with a time-dependent harmonic oscillator as its working medium. We obtain analytic expressions for the…
Steady-state Quantum Thermodynamics with Synthetic Negative Temperatures
Mohit Lal Bera, Tanmoy Pandit, Kaustav Chatterjee +4
A bath with a negative temperature is a subject of intense debate in recent times. It raises fundamental questions not only on our understanding of negative temperature of a bath i…
Lossy Micromaser Battery: Almost Pure States in the Jaynes-Cummings Regime
Vahid Shaghaghi, Varinder Singh, Matteo Carrega +2
We consider a micromaser model of a quantum battery, where the battery is a single mode of the electromagnetic field in a cavity, charged via repeated interactions with a stream of…
Thermodynamic uncertainty relation in nondegenerate and degenerate maser heat engines
Varinder Singh, Vahid Shaghaghi, Özgür E. Müstecaplıoğlu +1
We investigate the thermodynamic uncertainty relation (TUR), \textit{i.e.} a trade-off between entropy production rate and relative power fluctuations, for nondegenerate three-leve…
Performance analysis of quantum harmonic Otto engine and refrigerator under a trade-off figure of merit
Kirandeep Kaur, Shishram Rebari, Varinder Singh
We investigate the optimal performance of quantum Otto engine and refrigeration cycles of a time-dependent harmonic oscillator under a trade-off figure of merit for both adiabatic…
Micromasers as Quantum Batteries
Vahid Shaghaghi, Varinder Singh, Giuliano Benenti +1
We show that a micromaser is an excellent model of quantum battery. A highly excited, pure, and effectively steady state of the cavity mode, charged by coherent qubits, can be achi…
Unified trade-off optimization of quantum harmonic Otto engine and refrigerator
Varinder Singh, Satnam Singh, Obinna Abah +1
We investigate quantum Otto engine and refrigeration cycles of a time-dependent harmonic oscillator operating under the conditions of maximum -function, a trade-off objective fu…
Unified trade-off optimization of a three-level quantum refrigerator
Kirandeep Kaur, Varinder Singh, Jatin Ghai +2
We study the optimal performance of a three-level quantum refrigerator using a trade-off objective function, function, which represents a compromise between the energy benefits…
Performance bounds of non-adiabatic quantum harmonic Otto engine and refrigerator under a squeezed thermal reservoir
Varinder Singh, Özgür E. Müstecaplıoğlu
We analyze the performance of a quantum Otto cycle, employing time-dependent harmonic oscillator as the working fluid undergoing sudden expansion and compression strokes during the…
Optimal operation of a three-level quantum heat engine and universal nature of efficiency
Varinder Singh
We present a detailed study of a three-level quantum heat engine operating at maximum efficient power function, a trade-off objective function defined by the product of the efficie…
Optimal Performance of a Three-level Quantum Refrigerator
Varinder Singh, Tanmoy Pandit, Ramandeep S. Johal
We study the optimal performance of a three-level quantum refrigerator using two different objective functions: cooling power and -function. For both cases, we obtain general ex…
Three-level laser heat engine at optimal performance with ecological function
Varinder Singh, Ramandeep S. Johal
Although classical and quantum heat engines work on entirely different fundamental principles, there is an underlying similarity. For instance, the form of efficiency at optimal pe…
Low-dissipation Carnot-like heat engines at maximum efficient power
Varinder Singh, Ramandeep S. Johal
We study the optimal performance of Carnot-like heat engines working in low dissipation regime using the product of the efficiency and the power output, also known as the efficient…
Feynman-Smoluchowski engine at high temperatures and the role of constraints
Varinder Singh, Ramandeep S. Johal
Feynman's ratchet and pawl is a paradigmatic model for energy conversion using thermal fluctuations in the mesoscopic regime. Here, we optimize the power output of the ratchet as a…