15 citations · 41 across the 27 of their papers we have counts for
8 papers · 1 filter
Optimal Resource Scaling for Early Fault Tolerant Iterative Quantum Phase Estimation under Cost Error Tradeoffs
Mrudula A Mahindrakar, Avhishek Chatterjee
The iterative quantum phase estimation algorithm (IPEA) is better suited for NISQ and early fault-tolerant hardware compared to the original algorithm, which requires the inverse q…
Maximizing Qubit Throughput under Buffer Decoherence and Variability in Generation
Padma Priyanka, Avhishek Chatterjee, Sheetal Kalyani
Quantum communication networks require transmission of high-fidelity, uncoded qubits for applications such as entanglement distribution and quantum key distribution. However, curre…
Expander qLDPC Codes against Long-range Correlated Errors in Memory
Yash Deepak Kashtikar, Pranay Mathur, Sudharsan Senthil +1
Fault-tolerance using constant space-overhead against long-range correlated errors is an important practical question. In the pioneering works [Terhal and Burkard, PRA 2005], [Alif…
Limited Parallelization in Gate Operations Leads to Higher Space Overhead and Lower Noise Threshold
Sai Sanjay Narayanan, Smita Bagewadi, Avhishek Chatterjee
In a modern error corrected quantum memory or circuit, parallelization of gate operations is severely restricted due to issues like cross-talk. Hence, there are enough idle qubits…
Effect of Correlated Errors on Quantum Memory
Smita Bagewadi, Avhishek Chatterjee
Recent results on constant overhead LDPC code-based fault-tolerance against i.i.d. errors naturally lead to the question of fault-tolerance against errors with long-range correlati…
Limits of Fault-Tolerance on Resource-Constrained Quantum Circuits for Classical Problems
Uthirakalyani. G, Anuj K. Nayak, Avhishek Chatterjee +1
Existing lower bounds on redundancy in fault-tolerant quantum circuits are applicable when both the input and the intended output are quantum states. These bounds may not necessari…
A Converse for Fault-tolerant Quantum Computation
Uthirakalyani G, Anuj K. Nayak, Avhishek Chatterjee
As techniques for fault-tolerant quantum computation keep improving, it is natural to ask: what is the fundamental lower bound on redundancy? In this paper, we obtain a lower bound…
Unital Qubit Queue-channels: Classical Capacity and Product Decoding
Vikesh Siddhu, Avhishek Chatterjee, Krishna Jagannathan +2
Quantum queue-channels arise naturally in the context of buffering in quantum networks, wherein the noise suffered by the quantum states depends on the time spent waiting in the bu…