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Optimized Distribution of Quantum Circuits

Series: Bangalore Theory Seminars

Speaker: Ranjani G Sundaram, PhD student, Stony Brook University

Date/Time: Mar 01 11:00:00

Location: CSA Seminar Hall (Room No. 254, First Floor)

Abstract:
NISQ-era quantum computers suffer from limited qubit capacity, restricted physical connectivity and are susceptible to noise due to decoherence and gate operations. Error-correcting codes used to reduce noise often lead to a blow-up in the number of qubits further exacerbating the capacity crisis. In this talk, we discuss a workaround that allows large-scale quantum computations to be performed on small quantum computers by distributing the computations over a quantum network. The main design issue in this approach is the expensive communication between quantum processors. We present several algorithms over various circuit and network models that efficiently distribute quantum circuits while minimizing the communication cost incurred due to entanglements. Further, we outline possibilities for efficient estimation of ground and excited state Hamiltonians using iterative quantum circuit simulations.


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We are grateful to the Kirani family for generously supporting the theory seminar series

Hosts: Manisha Padala, Rameesh Paul, Rahul Madhavan, Rachana Gusain, KVN Sreenivas