4 papers · 1 filter
Entanglement and magic transitions in an all-to-all non-Hermitian spin model
Sasanka Dowarah, Michael Kolodrubetz
The long-time state of a non-Hermitian system is determined by the eigenvalue with the largest imaginary part. In interacting many-body systems this eigenvalue usually cannot be tr…
Mitigating Noise-Induced Barren Plateaus Using a Non-Unitary Ansatz: Application to Molecular Electronic Transport
Sasanka Dowarah, Abeda Sultana Shamma, Yazdan Maghsoud +2
Variational quantum algorithms (VQAs) offer a promising route toward simulating many-body quantum systems on noisy intermediate-scale quantum (NISQ) hardware. However, their scalab…
Spectral statistics and energy-gap scaling in local spin Hamiltonians
Sasanka Dowarah
We investigate the spectral properties of all-to-all interacting spin Hamiltonians acting on exactly spins, whose coupling coefficients are drawn from a normal distribution wit…
Phases and phase transition in Grover's algorithm with systematic noise
Sasanka Dowarah, Chuanwei Zhang, Vedika Khemani +1
While limitations on quantum computation by Markovian environmental noise are well-understood in generality, their behavior for different quantum circuits and noise realizations ca…