Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Magann, Alicia B"'
We investigate the quantum Zeno effect as a framework for designing and analyzing quantum algorithms for Hamiltonian simulation. We show that frequent projective measurements of an ancilla qubit register can be used to simulate quantum dynamics on a
Externí odkaz:
http://arxiv.org/abs/2405.13589
We introduce a constructive method for mapping non-unitary dynamics to a weighted set of unitary operations. We utilize this construction to derive a new correspondence between real and imaginary time, which we term Imaginary Time Quantum Dynamical E
Externí odkaz:
http://arxiv.org/abs/2403.03350
Autor:
Pathak, Shivesh, Russo, Antonio E., Seritan, Stefan, Magann, Alicia B., Bobrow, Eric, Landahl, Andrew J., Baczewski, Andrew D.
Density matrix downfolding (DMD) is a technique for regressing low-energy effective Hamiltonians from quantum many-body Hamiltonians. One limiting factor in the accuracy of classical implementations of DMD is the presence of difficult-to-quantify sys
Externí odkaz:
http://arxiv.org/abs/2403.01043
Publikováno v:
Phys. Rev. Research 6, 023128 (2024)
We present an expression for the spectral gap, opening up new possibilities for performing and accelerating spectral calculations of quantum many-body systems. We develop and demonstrate one such possibility in the context of tensor network simulatio
Externí odkaz:
http://arxiv.org/abs/2401.14368
Autor:
Sawaya, Nicolas PD, Marti-Dafcik, Daniel, Ho, Yang, Tabor, Daniel P, Neira, David E Bernal, Magann, Alicia B, Premaratne, Shavindra, Dubey, Pradeep, Matsuura, Anne, Bishop, Nathan, de Jong, Wibe A, Benjamin, Simon, Parekh, Ojas, Tubman, Norm, Klymko, Katherine, Camps, Daan
In order to characterize and benchmark computational hardware, software, and algorithms, it is essential to have many problem instances on-hand. This is no less true for quantum computation, where a large collection of real-world problem instances wo
Externí odkaz:
http://arxiv.org/abs/2306.13126
The ground state properties of quantum many-body systems are a subject of interest across chemistry, materials science, and physics. Thus, algorithms for finding ground states can have broad impacts. Variational quantum algorithms are one class of gr
Externí odkaz:
http://arxiv.org/abs/2303.02917
The spectral gap occupies a role of central importance in many open problems in physics. We present an approach for evaluating the spectral gap of a Hamiltonian from a simple ratio of two expectation values, both of which are evaluated using a quantu
Externí odkaz:
http://arxiv.org/abs/2303.02124
Publikováno v:
Phys. Rev. A 108, 033106 (2023)
The goal of quantum tracking control is to identify shaped fields to steer observable expectation values along designated time-dependent tracks. The fields are determined via an iteration-free procedure, which is based on inverting the underlying dyn
Externí odkaz:
http://arxiv.org/abs/2301.04255
Publikováno v:
Phys. Rev. Research 5, 033227 (2023)
We develop an adaptive method for quantum state preparation that utilizes randomness as an essential component and that does not require classical optimization. Instead, a cost function is minimized to prepare a desired quantum state through an adapt
Externí odkaz:
http://arxiv.org/abs/2301.04201
Autor:
Kovalsky, Lucas K., Calderon-Vargas, Fernando A., Grace, Matthew D., Magann, Alicia B., Larsen, James B., Baczewski, Andrew D., Sarovar, Mohan
Publikováno v:
Phys. Rev. Lett. 131, 060602 (2023)
Adiabatic time evolution can be used to prepare a complicated quantum many-body state from one that is easier to synthesize and Trotterization can be used to implement such an evolution digitally. The complex interplay between non-adiabaticity and di
Externí odkaz:
http://arxiv.org/abs/2209.06242