Efficient transfer of an arbitrary qutrit state in circuit quantum electrodynamics

Liu, Tong; Xiong, Shao-Jie; Cao, Xiao-Zhi; Su, Qi-Ping; Yang, Chui‐Ping

doi:10.1364/ol.40.005602

Cited by 16 publications

(11 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, quantum information processing and tomography of nanoscale semiconductor devices were studied [41,42]. In [43,44], schemes for quantum state transfer of a qutrit in circuit QED were proposed.…”

Section: Introductionmentioning

confidence: 99%

Protocol of a quantum walk in circuit QED

Zhou

Cai

et al. 2019

Phys. Rev. A

Self Cite

View full text Add to dashboard Cite

Implementation of discrete-time quantum walk (DTQW) with superconducting qubits is difficult since on-chip superconducting qubits cannot hop between lattice sites. We propose an efficient protocol for the implementation of DTQW in circuit quantum electrodynamics (QED), in which only N +1 qutrits and N assistant cavities are needed for an N -step DTQW. The operation of each DTQW step is very quick because only resonant processes are adopted. The numerical simulations show that high-similarity DTQW with the number of step up to 20 is feasible with present-day circuit QED technique. This protocol can help to study properties and applications of large-step DTQW in experiments, which is important for the development of quantum computation and quantum simulation in circuit QED.

show abstract

Section: Introductionmentioning

confidence: 99%

Protocol of a quantum walk in circuit QED

Zhou

Cai

et al. 2019

Phys. Rev. A

Self Cite

View full text Add to dashboard Cite

show abstract

“…Superconducting resonator (SR) has been studied for completing basic tasks in QIP because of its highquality factor and large zero-point electric fields, such as implementing quantum algorithms [29,30], coupling superconducting qubits [31][32][33], entangling remote qubits [34][35][36][37][38], and detecting the motion of a mechanical oscillator near the ground state [39]. In these studies, the SR is fixed with static boundaries, which makes the dynamic of the resonator behaves like a harmonic oscillator.…”

Section: Introductionmentioning

confidence: 99%

Entangling two high-Q microwave resonators assisted by a resonator terminated with SQUIDs

2019

View full text Add to dashboard Cite

We propose a superconducting circuit for quantum information processing (QIP) on high-quality (high-Q) superconducting resonators (SRs). In the circuit, two high-Q SRs are coupled to a highfrequency SR (acts as a quantum bus) assisted by superconducting quantum interference devices (SQUIDs) terminate in both ends of the high-frequency resonator. Each coupling strength between each high-Q resonator and the high-frequency resonator can be tuned independently from zero to the strong-coupling regime via the external flux threading through the SQUID. In the circuit, the frequencies of the two high-Q resonators are far detuned from the high-frequency resonator. That is, quantum information stored in high-Q resonators cannot be populated in the high-frequency resonator, which lets the bus can be designed to link lots of high-Q resonators for the large-scale QIP. To show the circuit can be used to achieve the QIP, we present a high-fidelity scheme to generate Bell state on the two high-Q resonators. The scheme shows that, to achieve the entanglement operation on high-Q resonators, fast tuning on the coupling is no longer mandatory and the coupling strengths are not required to be turned on or off simultaneously. = = = = , where subscripts l and r label the left SQUID and the right SQUID respectively. The characteristic capacitance and inductance of resonator C are treated as constants (c c (y)=c 0 and l c (y)=l 0 ). The flux across each junction of the SQUID is Ji F b (β=l, r and i=1, 2). The external flux can be written as l J l J l ext 1 2

show abstract

“…In addition, probabilistic transfer of high-dimensional quantum states between particles via a spin chain has been studied [56]. Moreover, a method has been proposed for transferring quantum states between two superconducting transmon qutrits via an adjustable inductive coupling [57], and an approach has been presented for transferring quantum states between two superconducting flux qutrits coupled to two resonators or cavities [58]. Here, qutrit refer to a three-level quantum system or a qudit for d = 3.…”

Section: Introductionmentioning

confidence: 99%

“…Note that Refs. [57,58] only work for QST between two qutrits and Ref. [58] requires the use of two resonators or cavities coupled to each qutrit.…”

Section: Introductionmentioning

confidence: 99%

Transferring arbitrary d-dimensional quantum states of a superconducting transmon qudit in circuit QED

Liu

Yang

et al. 2017

Sci Rep

Self Cite

View full text Add to dashboard Cite

A qudit (d-level quantum system) has a large Hilbert space and thus can be used to achieve many quantum information and communication tasks. Here, we propose a method to transfer arbitrary d-dimensional quantum states (known or unknown) between two superconducting transmon qudits coupled to a single cavity. The state transfer can be performed by employing resonant interactions only. In addition, quantum states can be deterministically transferred without measurement. Numerical simulations show that high-fidelity transfer of quantum states between two superconducting transmon qudits (d ≤ 5) is feasible with current circuit QED technology. This proposal is quite general and can be applied to accomplish the same task with natural or artificial atoms of a ladder-type level structure coupled to a cavity or resonator.

show abstract

Efficient transfer of an arbitrary qutrit state in circuit quantum electrodynamics

Cited by 16 publications

References 34 publications

Protocol of a quantum walk in circuit QED

Protocol of a quantum walk in circuit QED

Entangling two high-Q microwave resonators assisted by a resonator terminated with SQUIDs

Transferring arbitrary d-dimensional quantum states of a superconducting transmon qudit in circuit QED

Contact Info

Product

Resources

About