Zobrazeno 1 - 10
of 396
pro vyhledávání: '"Terhal P"'
The simulation of time-dynamics and thermal states of free fermions on $N = 2^n$ modes are known to require at most poly($2^n$) computational classical resources. We present several such free fermion problems that can be solved by a quantum algorithm
Externí odkaz:
http://arxiv.org/abs/2409.04550
Autor:
Shaw, Mackenzie H., Terhal, Barbara M.
Recently, Bravyi et al. [1] proposed a set of small quantum Bivariate Bicycle (BB) codes that achieve a similar circuit-level error rate to the surface code but with an improved encoding rate. In this work, we generalise a novel parity-check circuit
Externí odkaz:
http://arxiv.org/abs/2407.16336
Autor:
Ali, Hany, Marques, Jorge, Crawford, Ophelia, Majaniemi, Joonas, Serra-Peralta, Marc, Byfield, David, Varbanov, Boris, Terhal, Barbara M., DiCarlo, Leonardo, Campbell, Earl T.
Quantum error correction enables the preservation of logical qubits with a lower logical error rate than the physical error rate, with performance depending on the decoding method. Traditional error decoding approaches, relying on the binarization (`
Externí odkaz:
http://arxiv.org/abs/2403.00706
During the last 30 years, stimulated by the quest to build superconducting quantum processors, a theory of quantum electrical circuits has emerged and this theory goes under the name of circuit quantum electrodynamics or circuit-QED. The goal of the
Externí odkaz:
http://arxiv.org/abs/2312.05329
We construct local fermionic Hamiltonians with no low-energy trivial states (NLTS), providing a fermionic counterpart to the NLTS theorem. Distinctly from the qubit case, we define trivial states via finite-depth $\textit{fermionic}$ quantum circuits
Externí odkaz:
http://arxiv.org/abs/2307.13730
Neural-network decoders can achieve a lower logical error rate compared to conventional decoders, like minimum-weight perfect matching, when decoding the surface code. Furthermore, these decoders require no prior information about the physical error
Externí odkaz:
http://arxiv.org/abs/2307.03280
We formally define homological quantum rotor codes which use multiple quantum rotors to encode logical information. These codes generalize homological or CSS quantum codes for qubits or qudits, as well as linear oscillator codes which encode logical
Externí odkaz:
http://arxiv.org/abs/2303.13723
Autor:
Marques, J. F., Ali, H., Varbanov, B. M., Finkel, M., Veen, H. M., van der Meer, S. L. M., Valles-Sanclemente, S., Muthusubramanian, N., Beekman, M., Haider, N., Terhal, B. M., DiCarlo, L.
Publikováno v:
Phys. Rev. Lett. 130, 250602 (2023)
Minimizing leakage from computational states is a challenge when using many-level systems like superconducting quantum circuits as qubits. We realize and extend the quantum-hardware-efficient, all-microwave leakage reduction unit (LRU) for transmons
Externí odkaz:
http://arxiv.org/abs/2302.09876
Publikováno v:
Quantum 7, 1081 (2023)
We consider the problem of approximating the ground state energy of a fermionic Hamiltonian using a Gaussian state. In sharp contrast to the dense case, we prove that strictly $q$-local $\rm {\textit {sparse}}$ fermionic Hamiltonians have a constant
Externí odkaz:
http://arxiv.org/abs/2211.16518
Autor:
Ciani, Alessandro, Varbanov, Boris M., Jolly, Nicolas, Andersen, Christian K., Terhal, Barbara M.
We propose and analyze two types of microwave-activated gates between a fluxonium and a transmon qubit, namely a cross-resonance (CR) and a CPHASE gate. The large frequency difference between a transmon and a fluxonium makes the realization of a two-
Externí odkaz:
http://arxiv.org/abs/2206.06203