33 citations · 95 across the 8 of their papers we have counts for
8 papers
Density Operator Expectation Maximization
Adit Vishnu, Abhay Shastry, Dhruva Kashyap +1
Machine learning with density operators, the mathematical foundation of quantum mechanics, is gaining prominence with rapid advances in quantum computing. Generative models based o…
Shot-frugal and Robust quantum kernel classifiers
Abhay Shastry, Abhijith Jayakumar, Apoorva Patel +1
Quantum kernel methods are a candidate for quantum speed-ups in supervised machine learning. The number of quantum measurements N required for a reasonable kernel estimate is a cri…
Quantum flicker noise in atomic and molecular junctions
Ofir Shein-Lumbroso, Junjie Liu, Abhay Shastry +2
We report on a quantum form of electronic flicker noise in nanoscale conductors that contains valuable information on quantum transport. This noise is experimentally identified in…
The third law of thermodynamics in open quantum systems
Abhay Shastry, Yiheng Xu, Charles A. Stafford
We consider open quantum systems consisting of a finite system of independent fermions with arbitrary Hamiltonian coupled to one or more equilibrium fermion reservoirs (which need…
Scanning Tunneling Thermometry
Abhay Shastry, Sosuke Inui, Charles A. Stafford
Temperature imaging of nanoscale systems is a fundamental problem which has myriad potential technological applications. For example, nanoscopic cold spots can be used for spot coo…
Local entropy of a nonequilibrium fermion system
Charles A. Stafford, Abhay Shastry
The local entropy of a nonequilibrium system of independent fermions is investigated, and analyzed in the context of the laws of thermodynamics. It is shown that the local temperat…
Temperature and voltage measurement in quantum systems far from equilibrium
Abhay Shastry, Charles A. Stafford
We show that a local measurement of temperature and voltage for a quantum system in steady state, arbitrarily far from equilibrium, with arbitrary interactions within the system, i…
Cold spots in quantum systems far from equilibrium: local entropies and temperatures near absolute zero
Abhay Shastry, Charles A. Stafford
We consider a question motivated by the third law of thermodynamics: can there be a local temperature arbitrarily close to absolute zero in a nonequilibrium quantum system? We cons…