Thermal entanglement of superconducting qubits for arbitrary interaction strength
arXiv:2211.00417 · doi:10.1016/j.physc.2021.1353977
Abstract
We investigate the thermal entanglement in two superconducting qubits for arbitrary interaction strength and ground state frequencies. We calculate the concurrence of the system to quantify the thermal entanglement. We suggest a scheme, where an external tunable coupler qubit sandwich between two superconducting qubits generates entanglement. The behavior of concurrence is analyzed for three different cases, in which we consider the effects of the temperature, the qubit-qubit effective coupling strength, and the qubit frequencies on the thermal entanglement. What deserves mentioning here is that to achieve maximally entangled states, it is better to use two superconducting qubits with the same frequencies. We also note that for a given temperature, the thermal entanglement can be tuned by qubit internal capacitance and inductance.
References in corpus (23)
- Entanglement of Formation of an Arbitrary State of Two Qubits
- Quantum Computing
- Charge insensitive qubit design derived from the Cooper pair box
- Entanglement of a Pair of Quantum Bits
- Probing many-body dynamics on a 51-atom quantum simulator
- Atomic physics and quantum optics using superconducting circuits
- Observation of a Many-Body Dynamical Phase Transition with a 53-Qubit Quantum Simulator
- State preservation by repetitive error detection in a superconducting quantum circuit
- Natural Thermal and Magnetic Entanglement in 1D Heisenberg Model
- Coherent Josephson qubit suitable for scalable quantum integrated circuits
- Quantum information processing with circuit quantum electrodynamics
- The Flux Qubit Revisited to Enhance Coherence and Reproducibility
- Schrieffer-Wolff transformation for quantum many-body systems
- 10-qubit entanglement and parallel logic operations with a superconducting circuit
- A tunable coupling scheme for implementing high-fidelity two-qubit gates
- Low-decoherence flux qubit
- Thermal entanglement in a two-qubit Heisenberg XXZ spin chain under an inhomogeneous magnetic field
- I-concurrence and tangle for isotropic states
- Tunable coupling of superconducting qubits
- High coherence hybrid superconducting qubit
- Using models to improve optimizers for variational quantum algorithms
- Entanglement dynamics of qubits in a common environment
- Entanglement witnesses for systems and new classes of entangled qudit states