Spontaneous decay of artificial atoms in a multi-qubit system
- URL: http://arxiv.org/abs/2104.04927v1
- Date: Sun, 11 Apr 2021 05:50:50 GMT
- Title: Spontaneous decay of artificial atoms in a multi-qubit system
- Authors: Ya. S. Greenberg, A. A. Shtygashev, and A. G. Moiseev
- Abstract summary: We study the evolution of qubits amplitudes if the only qubit in the chain was initially excited.
We show that the temporal dynamics of qubits amplitudes crucially depend on the value of kd.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We consider a one-dimensional chain of N equidistantly spaced noninteracting
qubits embedded in an open waveguide. In the frame of single-excitation
subspace, we systematically study the evolution of qubits amplitudes if the
only qubit in the chain was initially excited. We show that the temporal
dynamics of qubits amplitudes crucially depend on the value of kd, where k is
the wave vector, d is a distance between neighbor qubits. If kd is equal to an
integer multiple of $\pi$, then the qubits are excited to a stationary level
which scales as SN^{-1}S. We show that in this case, it is the dark states
which prevent qubits from decaying to zero even though they do not contribute
to the output spectrum of photon emission. For other values of kd the
excitations of qubits have the form of damping oscillations, which represent
the vacuum Rabi oscillations in a multi-qubit system. In this case, the output
spectrum of photon radiation is defined by a subradiant state with the smallest
width.
Related papers
- Single-photon scattering on a two-qubit system. Spatio-temporal
structure of the scattered field [0.0]
We study the photon electric field produced by the scattering of a single photon narrow pulse from a system of two identical qubits coupled to modes in a one-dimensional (1D) open waveguide.
We show that as the time after the event of scattering tends to infinity, the steady state photon the field is being formed in the whole one-dimensional space.
arXiv Detail & Related papers (2023-10-28T14:57:08Z) - Qubit readouts enabled by qubit cloaking [49.1574468325115]
Time-dependent drives play a crucial role in quantum computing efforts.
They enable single-qubit control, entangling logical operations, as well as qubit readout.
Qubit cloaking was introduced in Lled'o, Dassonneville, et al.
arXiv Detail & Related papers (2023-05-01T15:58:25Z) - Resolving Fock states near the Kerr-free point of a superconducting
resonator [51.03394077656548]
We have designed a tunable nonlinear resonator terminated by a SNAIL (Superconducting Asymmetric Inductive eLement)
We have excited photons near this Kerr-free point and characterized the device using a transmon qubit.
arXiv Detail & Related papers (2022-10-18T09:55:58Z) - Quantum vibrational mode in a cavity confining a massless spinor field [91.3755431537592]
We analyse the reaction of a massless (1+1)-dimensional spinor field to the harmonic motion of one cavity wall.
We demonstrate that the system is able to convert bosons into fermion pairs at the lowest perturbative order.
arXiv Detail & Related papers (2022-09-12T08:21:12Z) - Oscillating bound states in non-Markovian photonic lattices [0.0]
We perform exact calculations for the oscillating BICs in a 1D photonic lattice coupled to "giant atom" at multiple points.
We show that the bound states outside the energy band are detrimental to the oscillating BIC phenomenon.
Our work can be experimentally implemented on current photonic waveguide array platforms.
arXiv Detail & Related papers (2022-08-23T17:16:13Z) - Cavity-QED of a quantum metamaterial with tunable disorder [0.0]
We explore a quantum metamaterial based on a superconducting chip with 25 frequency-tunable transmon qubits coupled to a common coplanar resonator.
The collective bright and dark modes are probed via the microwave response, i.e., by measuring the transmission amplitude of an external microwave signal.
arXiv Detail & Related papers (2021-07-03T12:24:56Z) - Spontaneous decay of artificial atoms in a three-qubit system [0.0]
We study the evolution of qubits amplitudes in a one-dimensional chain consisting of three equidistantly spaced noninteracting qubits embedded in an open waveguide.
We show that the dynamics of qubits amplitudes crucially depend on the value of $kd$.
arXiv Detail & Related papers (2021-06-25T06:18:36Z) - Tunable Anderson Localization of Dark States [146.2730735143614]
We experimentally study Anderson localization in a superconducting waveguide quantum electrodynamics system.
We observe an exponential suppression of the transmission coefficient in the vicinity of its subradiant dark modes.
The experiment opens the door to the study of various localization phenomena on a new platform.
arXiv Detail & Related papers (2021-05-25T07:52:52Z) - Single-qubit remote manipulation by magnetic solitons [62.997667081978825]
Magnetic solitons can constitute a means for manipulating qubits from a distance.
When a suitable soliton passes by, the coupled qubit undergoes nontrivial operations.
arXiv Detail & Related papers (2021-04-07T08:28:49Z) - Waveguide bandgap N-qubit array with a tunable transparency resonance [0.0]
We study a single photon transmission through 1D N- qubit chain.
The qubits are supposed to be identical with equal distance between neighbors.
We show that for odd N the tuning of the excitation frequency of a central qubit gives rise to the appearance within a bandgap of a narrow resonance with a full transmission.
arXiv Detail & Related papers (2020-07-29T13:02:15Z) - Zitterbewegung and Klein-tunneling phenomena for transient quantum waves [77.34726150561087]
We show that the Zitterbewegung effect manifests itself as a series of quantum beats of the particle density in the long-time limit.
We also find a time-domain where the particle density of the point source is governed by the propagation of a main wavefront.
The relative positions of these wavefronts are used to investigate the time-delay of quantum waves in the Klein-tunneling regime.
arXiv Detail & Related papers (2020-03-09T21:27:02Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.