Analogue Non-Causal Null Curves and Chronology Protection in a dc-SQUID Array
We propose an analogue quantum simulator of a 1 + 1D spacetime containing non-causal curves, in particular null geodesics going back in time, by means of a dc-SQUID array embedded on an open superconducting transmission line. This is achieved by mimicking the spatial dependence of the metric with th...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-08-01
|
| Series: | Universe |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2218-1997/8/9/452 |
| _version_ | 1797481709038469120 |
|---|---|
| author | Carlos Sabín |
| author_facet | Carlos Sabín |
| author_sort | Carlos Sabín |
| collection | DOAJ |
| description | We propose an analogue quantum simulator of a 1 + 1D spacetime containing non-causal curves, in particular null geodesics going back in time, by means of a dc-SQUID array embedded on an open superconducting transmission line. This is achieved by mimicking the spatial dependence of the metric with the propagation speed of the electromagnetic field in the simulator, which can be modulated by an external magnetic flux. We show that it is possible to simulate a spacetime region containing non-causal null geodesics, but not a full spacetime containing a chronological horizon separating regions with non-causal null geodesics and regions without them. This is in agreement with a recent suggestion of an analogue-gravity chronology protection mechanism by Barceló et al. |
| first_indexed | 2024-03-09T22:18:26Z |
| format | Article |
| id | doaj.art-a539def7b7d9459daccfb4c46527bc3b |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-03-09T22:18:26Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-a539def7b7d9459daccfb4c46527bc3b2023-11-23T19:18:45ZengMDPI AGUniverse2218-19972022-08-018945210.3390/universe8090452Analogue Non-Causal Null Curves and Chronology Protection in a dc-SQUID ArrayCarlos Sabín0Departamento de Física Teórica, Universidad Autónoma de Madrid, 28049 Madrid, SpainWe propose an analogue quantum simulator of a 1 + 1D spacetime containing non-causal curves, in particular null geodesics going back in time, by means of a dc-SQUID array embedded on an open superconducting transmission line. This is achieved by mimicking the spatial dependence of the metric with the propagation speed of the electromagnetic field in the simulator, which can be modulated by an external magnetic flux. We show that it is possible to simulate a spacetime region containing non-causal null geodesics, but not a full spacetime containing a chronological horizon separating regions with non-causal null geodesics and regions without them. This is in agreement with a recent suggestion of an analogue-gravity chronology protection mechanism by Barceló et al.https://www.mdpi.com/2218-1997/8/9/452quantum simulationsuperconducting circuitsquantum field theory in curved spacetime |
| spellingShingle | Carlos Sabín Analogue Non-Causal Null Curves and Chronology Protection in a dc-SQUID Array Universe quantum simulation superconducting circuits quantum field theory in curved spacetime |
| title | Analogue Non-Causal Null Curves and Chronology Protection in a dc-SQUID Array |
| title_full | Analogue Non-Causal Null Curves and Chronology Protection in a dc-SQUID Array |
| title_fullStr | Analogue Non-Causal Null Curves and Chronology Protection in a dc-SQUID Array |
| title_full_unstemmed | Analogue Non-Causal Null Curves and Chronology Protection in a dc-SQUID Array |
| title_short | Analogue Non-Causal Null Curves and Chronology Protection in a dc-SQUID Array |
| title_sort | analogue non causal null curves and chronology protection in a dc squid array |
| topic | quantum simulation superconducting circuits quantum field theory in curved spacetime |
| url | https://www.mdpi.com/2218-1997/8/9/452 |
| work_keys_str_mv | AT carlossabin analoguenoncausalnullcurvesandchronologyprotectioninadcsquidarray |